Perspectives and Impact of a Parent-Child Intervention on Dietary Intake and Physical Activity Behaviours, Parental Motivation, and Parental Body Composition: A Randomized Controlled Trial.

Adults and children in Canada are not meeting physical activity guidelines nor consuming sufficient nutrient-rich foods. High engagement in these unhealthy behaviours can lead to obesity and its associated diseases. Parent-child interventions aimed at obesity prevention/treatment have assisted families with making positive changes to their nutrition and physical activity behaviours. Given that the home environment shapes early health behaviours, it is important to target both parents and children when addressing diet and physical activity. One method that has been shown to improve health outcomes is co-active coaching. The current study explored the impact of a three-month co-active coaching and/or health education intervention on the dietary intake and physical activity behaviours of parents with overweight/obesity and their children (ages 2.5-10; of any weight). Body composition (i.e., body mass index [BMI] and waist circumference), changes in parental motivation with respect to physical activity and dietary behaviours, and parental perceptions of program improvements were collected. A concurrent mixed methods study comprised of a randomized controlled trial and a descriptive qualitative design was utilized. Fifty parent-child dyads were recruited and randomly assigned to the control (n = 25) or intervention (n = 25) group. Assessments were completed at baseline, mid-intervention (six weeks), post-intervention (three months), and six-month follow-up. A linear mixed effects model was utilized for quantitative analysis. Inductive content analysis was used to extract themes from parent interviews. No significant results were observed over time for the dependent measures. Parents in both control and intervention groups reported varied program experiences, including developing changes in perspective, increased awareness of habits, and heightened accountability for making positive changes in themselves, and consequently, their families. Parents also shared barriers they faced when implementing changes (e.g., time, weather, stress). Qualitatively, both groups reported benefitting from this program, with the intervention group describing salient benefits from engaging in coaching. This research expands on the utility of coaching as a method for behaviour change, when compared to education only, in parents with overweight/obesity and their children.

Are we missing the target? Are we aiming too low? What are the aerobic exercise prescriptions and their effects on markers of cardiovascular health and systemic inflammation in patients with knee osteoarthritis? A systematic review and meta-analysis.

OBJECTIVES: We systemically reviewed published studies that evaluated aerobic exercise interventions in patients with knee osteoarthritis (OA) to: (1) report the frequency, intensity, type and time (FITT) of exercise prescriptions and (2) quantify the changes in markers of cardiovascular health and systemic inflammation. DATA SOURCES: PubMed, CINAHL, Scopus; inception to January 2019. ELIGIBILITY CRITERIA: Randomised clinical trials (RCT), cohort studies, case series. DESIGN: We summarised exercise prescriptions for all studies and calculated effect sizes with 95% CIs for between-group (RCTs that compared exercise and control groups) and within-group (pre-post exercise) differences in aerobic capacity (VO2), heart rate (HR), systolic blood pressure (SBP), diastolic blood pressure (DBP) and inflammatory markers (interleukin-6 (IL-6), tumour necrosis factor-alpha). We pooled results where possible using random effects models. RESULTS: Interventions from 49 studies were summarised; 8% (4/49) met all FITT guidelines; 16% (8/49) met all or most FITT guidelines. Fourteen studies (10 RCTs) reported at least one marker of cardiovascular health or systemic inflammation. Mean differences (95% CI) indicated a small to moderate increase in VO2 (0.84 mL/min/kg; 95% CI 0.37 to 1.31), decrease in HR (-3.56 beats per minute; 95% CI -5.60 to -1.52) and DBP (-4.10 mm Hg; 95% CI -4.82 to -3.38) and no change in SBP (-0.36 mm Hg; 95% CI -3.88 to 3.16) and IL-6 (0.37 pg/mL; 95% CI -0.11 to 0.85). Within-group differences were also small to moderate. CONCLUSIONS: In studies of aerobic exercise in patients with knee OA, very few interventions met guideline-recommended dose; there were small to moderate changes in markers of cardiovascular health and no decrease in markers of systemic inflammation. These findings question whether aerobic exercise is being used to its full potential in patients with knee OA. PROSPERO REGISTRATION NUMBER: CRD42018087859.

Who Uses Mobile Phone Health Apps and Does Use Matter? A Secondary Data Analytics Approach.

BACKGROUND: Mobile phone use and the adoption of healthy lifestyle software apps ("health apps") are rapidly proliferating. There is limited information on the users of health apps in terms of their social demographic and health characteristics, intentions to change, and actual health behaviors. OBJECTIVE: The objectives of our study were to (1) to describe the sociodemographic characteristics associated with health app use in a recent US nationally representative sample; (2) to assess the attitudinal and behavioral predictors of the use of health apps for health promotion; and (3) to examine the association between the use of health-related apps and meeting the recommended guidelines for fruit and vegetable intake and physical activity. METHODS: Data on users of mobile devices and health apps were analyzed from the National Cancer Institute's 2015 Health Information National Trends Survey (HINTS), which was designed to provide nationally representative estimates for health information in the United States and is publicly available on the Internet. We used multivariable logistic regression models to assess sociodemographic predictors of mobile device and health app use and examine the associations between app use, intentions to change behavior, and actual behavioral change for fruit and vegetable consumption, physical activity, and weight loss. RESULTS: From the 3677 total HINTS respondents, older individuals (45-64 years, odds ratio, OR 0.56, 95% CI 0.47-68; 65+ years, OR 0.19, 95% CI 0.14-0.24), males (OR 0.80, 95% CI 0.66-0.94), and having degree (OR 2.83, 95% CI 2.18-3.70) or less than high school education (OR 0.43, 95% CI 0.24-0.72) were all significantly associated with a reduced likelihood of having adopted health apps. Similarly, both age and education were significant variables for predicting whether a person had adopted a mobile device, especially if that person was a college graduate (OR 3.30). Individuals with apps were significantly more likely to report intentions to improve fruit (63.8% with apps vs 58.5% without apps, P=.01) and vegetable (74.9% vs 64.3%, P<.01) consumption, physical activity (83.0% vs 65.4%, P<.01), and weight loss (83.4% vs 71.8%, P<.01). Individuals with apps were also more likely to meet recommendations for physical activity compared with those without a device or health apps (56.2% with apps vs 47.8% without apps, P<.01). CONCLUSIONS: The main users of health apps were individuals who were younger, had more education, reported excellent health, and had a higher income. Although differences persist for gender, age, and educational attainment, many individual sociodemographic factors are becoming less potent in influencing engagement with mobile devices and health app use. App use was associated with intentions to change diet and physical activity and meeting physical activity recommendations.

HealtheSteps™ Study Protocol: a pragmatic randomized controlled trial promoting active living and healthy lifestyles in at-risk Canadian adults delivered in primary care and community-based clinics.

BACKGROUND: Physical inactivity is one of the leading causes of chronic disease in Canadian adults. With less than 50% of Canadian adults reaching the recommended amount of daily physical activity, there is an urgent need for effective programs targeting this risk factor. HealtheSteps™ is a healthy lifestyle prescription program, developed from an extensive research base to address risk factors for chronic disease such as physical inactivity, sedentary behaviour and poor eating habits. HealtheSteps™ participants are provided with in-person lifestyle coaching and access to eHealth technologies delivered in community-based primary care clinics and health care organizations. METHOD/DESIGN: To determine the effectiveness of Healthesteps™, we will conduct a 6-month pragmatic randomized controlled trial with integrated process and economic evaluations of HealtheSteps™ in 5 clinic settings in Southwestern Ontario. 110 participants will be individually randomized (1:1; stratified by site) to either the intervention (HealtheSteps™ program) or comparator (Wait-list control). There are 3 phases of the HealtheSteps™ program, lasting 6 months each. The active phase consists of bi-monthly in-person coaching with access to a full suite of eHealth technology supports. During the maintenance phase I, the in-person coaching will be removed, but participants will still have access to the full suite of eHealth technology supports. In the final stage, maintenance phase II, access to the full suite of eHealth technology supports is removed and participants only have access to publicly available resources and tools. DISCUSSION: This trial aims to determine the effectiveness of the program in increasing physical activity levels and improving other health behaviours and indicators, the acceptability of the HealtheSteps™ program, and the direct cost for each person participating in the program as well as the costs associated with delivering the program at the different community sites. These results will inform future optimization and scaling up of the program into additional community-based primary care sites. TRIAL REGISTRATION: NCT02413385 (Clinicaltrials.gov). Date Registered: April 6, 2015.

Hockey Fans in Training (Hockey FIT) pilot study protocol: a gender-sensitized weight loss and healthy lifestyle program for overweight and obese male hockey fans.

BACKGROUND: Effective approaches that engage men in weight loss and lifestyle change are important because of worldwide increases, including in Canada, in obesity and chronic diseases. Football Fans in Training (FFIT), developed in Scotland, successfully tackled these problems by engaging overweight/obese male football fans in sustained weight loss and positive health behaviours, through program deliveries at professional football stadia. METHODS: Aims: 1) Adapt FFIT to hockey within the Canadian context and integrate with HealtheSteps™ (evidence-based lifestyle program) to develop Hockey Fans in Training (Hockey FIT); 2) Explore potential for Hockey FIT to help overweight/obese men lose weight and improve other outcomes by 12 weeks, and retain these improvements to 12 months; 3) Evaluate feasibility of recruiting and retaining overweight/obese men; 4) Evaluate acceptability of Hockey FIT; and 5) Conduct program optimization via a process evaluation. We conducted a two-arm pilot pragmatic randomized controlled trial (pRCT) whereby 80 overweight/obese male hockey fans (35-65 years; body-mass index ≥28 kg/m2) were recruited through their connection to two junior A hockey teams (London and Sarnia, ON) and randomized to Intervention (Hockey FIT) or Comparator (Wait-List Control). Hockey FIT includes a 12-week Active Phase (classroom instruction and exercise sessions delivered weekly by trained coaches) and a 40-week Maintenance Phase. Data collected at baseline and 12 weeks (both groups), and 12 months (Intervention only), will inform evaluation of the potential of Hockey FIT to help men lose weight and improve other health outcomes. Feasibility and acceptability will be assessed using data from self-reports at screening and baseline, program fidelity (program observations and coach reflections), participant focus group discussions, coach interviews, as well as program questionnaires and interviews with participants. This information will be analyzed to inform program optimization. DISCUSSION: Hockey FIT is a gender-sensitive program designed to engage overweight/obese male hockey fans to improve physical activity and healthy eating choices, thereby leading to weight loss and other positive changes in health outcomes. We expect this study to provide evidence for a full-scale confirmatory pRCT. TRIAL REGISTRATION: NCT02396524 (Clinicaltrials.gov). Date of registration: Feb 26, 2015.

Engaging Men in Chronic Disease Prevention and Management Programs: A Scoping Review.

Chronic disease has become one of the largest health burdens facing the developed world. Men are at a higher risk of being diagnosed with chronic disease than women. Although lifestyle interventions have been shown to reduce the risk of chronic disease in participants, men are often underrepresented in such programs. The purpose of this study was to explore the individual-level and program-specific factors that affect male participation rates in chronic disease prevention and management (CDPM) programs. A scoping review methodology was selected, and 25 studies met the criteria for inclusion in the review. Results showed that traditional group-based programs that focused on topics such as nutrition and physical activity were often seen by men as inherently feminine, which served as a barrier for participation. Program-specific factors that attracted men to participate in interventions included a group component with like-minded men, the use of humor in the delivery of health information, the inclusion of both nutrition and physical activity components, and the presence of some manner of competition. A past negative health event, personal concern for health status, and motivation to improve physical appearance were cited by men as facilitators to CDPM program participation. Gaps in the research are identified, and results of this study can be used to inform the development of CDPM programs that will improve the engagement and participation of men.

The 2011 Canadian Hypertension Education Program recommendations for the management of hypertension: blood pressure measurement, diagnosis, assessment of risk, and therapy.

We updated the evidence-based recommendations for the diagnosis, assessment, prevention, and treatment of hypertension in adults for 2011. The major guideline changes this year are: (1) a recommendation was made for using comparative risk analogies when communicating a patient's cardiovascular risk; (2) diagnostic testing issues for renal artery stenosis were discussed; (3) recommendations were added for the management of hypertension during the acute phase of stroke; (4) people with hypertension and diabetes are now considered high risk for cardiovascular events if they have elevated urinary albumin excretion, overt kidney disease, cardiovascular disease, or the presence of other cardiovascular risk factors; (5) the combination of an angiotensin-converting enzyme (ACE) inhibitor and a dihydropyridine calcium channel blocker (CCB) is preferred over the combination of an ACE inhibitor and a thiazide diuretic in persons with diabetes and hypertension; and (6) a recommendation was made to coordinate with pharmacists to improve antihypertensive medication adherence. We also discussed the recent analyses that examined the association between angiotensin II receptor blockers (ARBs) and cancer.

Efficacy of a family practice-based lifestyle intervention program to increase physical activity and reduce clinical and physiological markers of vascular health in patients with high normal blood pressure and/or high normal blood glucose (SNAC): study protocol for a randomized controlled trial.

BACKGROUND: Previous interventions to increase physical activity and reduce cardiovascular risk factors have been targeted at individuals with established disease; less attention has been given to intervention among individuals with high risk for disease nor has there been determination of the influence of setting in which the intervention is provided. In particular, family practice represents an ideal setting for the provision and long-term maintenance of lifestyle interventions for patients at risk (ie high-normal blood pressure or impaired glucose tolerance). METHODS/DESIGN: The Staged Nutrition and Activity Counseling (SNAC) study is a randomized clustered design clinical trial that will investigate the effectiveness and efficacy of a multi-component lifestyle intervention on cardiovascular disease risk factors and vascular function in patients at risk in primary care. Patients will be randomized by practice to either a standard of care lifestyle intervention or a behaviourally-based, matched prescriptive physical activity and diet change program. The primary goal is to increase physical activity and improve dietary intake according to Canada's Guides to Physical Activity Healthy Eating over 24 months. The primary intention to treat analysis will compare behavioral, physiological and metabolic outcomes at 6, 12 and 24 months post-randomization including estimation of incident hypertension and/or diabetes. DISCUSSION: The design features of our trial, and the practical problems (and solutions) associated with implementing these design features, particularly those that result in potential delay between recruitment, baseline data collection, randomization, intervention, and assessment will be discussed. Results of the SNAC trial will provide scientific rationale for the implementation of this lifestyle intervention in primary care. TRIAL REGISTRATION: ISRCTN: ISRCTN:42921300.

Longitudinal changes in central artery stiffness with lifestyle modification, washout, and drug treatment in individuals at risk for cardiovascular disease.

We assessed 17 middle-aged and older individuals (58.0 +/- 7.9 years, 7 females) at risk for cardiovascular disease regarding: (1) Whether carotid artery stiffness (cAS) would be reduced with a 1-year lifestyle modification program, (2) to what degree cAS would return following washout (mean of 26.9 +/- 4.0 months) from the active intervention, and (3) whether a 24-week telmisartan treatment would reduce cAS more than our lifestyle modification program. cAS by Doppler ultrasound, cardiovascular disease risk factors, and exercise capacity were assessed at three points: Following the 1-year lifestyle modification, following the washout period, and following a 24-week telmisartan treatment. Following telmisartan, systolic blood pressure (SBP) was significantly decreased (114.8 +/- 12.3 mmHg) compared to baseline (127.9 +/- 12.7 mmHg) and following the washout period (126.1 +/- 14.9 mmHg). Similarly, diastolic blood pressure (DBP) was significantly lower following telmisaratn than following the washout period. Exercise capacity was increased following lifestyle modification but returned to the baseline level following the washout period. Following the lifestyle modification program, cAS was significantly reduced, and this reduction was maintained following the washout period. Conversely, the subsequent telmisartan treatment did not change cAS despite a significant blood pressure reduction. These results suggest that the reduced cAS achieved with lifestyle modification may not necessarily disappear following a cessation of the active program, indicating a possible role that family physicians can play in their clinical practice, and also providing a further rationale to promote lifestyle modification as an initial therapy for this population. In contrast, no additional benefit of telmisartan beyond our lifestyle intervention was observed in this study.

Choices, persistence and adherence to antihypertensive agents: evidence from RAMQ data.

BACKGROUND: Most treatment recommendations for hypertension are based on criteria that consider efficacy, safety and cost. Given the need for long-term use of antihypertensive agents, treatment compliance should also be taken into consideration in the selection process. OBJECTIVE: The purpose of the present study was to estimate persistence and adherence to antihypertensive agents in a real-life setting. METHODS: Persistence and adherence to treatment were estimated using data from the Regie de l'assurance maladie du Quebec. RESULTS: Data from a random sample of 4561 subjects with a diagnosis of hypertension covered by the Regie de l'assurance maladie du Quebec drug plan and using one of the antihypertensive agents reimbursed by the drug plan for the first time between January 2000 and December 2001 were analyzed. The persistence rate observed after a two-year period with diuretics was significantly lower (52.8%) than with any other classes of antihypertensive agent (P<0.01). Persistence rates for beta-blockers, calcium channel blockers, angiotensin-II receptor blockers and angiotensin-I converting enzyme inhibitors were 69.3%, 64.3%, 60.9% and 58.9%, respectively. After two years, the proportion of patients who were 80% adherent to their treatment was 64.9% for angiotensin-I converting enzyme inhibitors, 65.0% for angiotensin-II receptor blockers, 64.2% for calcium channel blockers, 60.3% for beta-blockers and 50.9% for diuretics. The proportion of patients who were 80% adherent to their treatment was significantly lower for diuretics than with any other antihypertensive agents (P<0.01). CONCLUSION: Persistence and adherence to treatment are essential to treatment success. Results of the present study indicate that, in a real-life setting, patients are significantly less compliant to diuretics than to any other antihypertensive agents.

Improvement in aerobic fitness during rehabilitation after hip fracture.

OBJECTIVE: To evaluate the effect of an upper-body exercise program on cardiorespiratory fitness in older adults with hip fracture during inpatient rehabilitation. DESIGN: Randomized controlled trial using a convenience sample. SETTING: An inpatient rehabilitation unit. PARTICIPANTS: Twenty older patients (age, 81.3+/-7.2y; 14 women). INTERVENTION: Patients were randomly assigned to a control group (n=10) or a training group (n=10). Both groups attended physical and occupational therapy sessions 5 times a week during rehabilitation (mean length of stay, 32.9+/-5.3d). Patients in the training program used an arm crank ergometer 3 times a week for 4 weeks. MAIN OUTCOME MEASURE: Peak oxygen consumption (Vo(2)peak). RESULTS: Vo(2)peak increased significantly in the training group (8.9+/-1.4 to 10.8+/-1.7mL x kg(-1) x min(-1)) and did not change in the control group (8.9+/-1.2 to 8.8+/-1.6mL x kg(-1).min(-1)). At discharge, both groups were significantly improved in all functional outcome measures (Timed Up & Go [TUG] test, Berg Balance Scale [BBS], FIM instrument, two-minute walk test [2MWT], and ten-minute walk test [10MWT]). The training group performed significantly better in mobility (TUG, 2MWT, 10MWT) and balance (BBS) compared with the control group. There was a significant correlation between Vo(2)peak and the 2MWT (r=.81) and 10MWT (r=.85) in the training group at discharge. CONCLUSIONS: The upper-body exercise program had a significant effect on aerobic power. Our results suggest that aerobic endurance exercise should be integrated into standard rehabilitation to enhance patients' aerobic fitness and mobility after hip fracture surgery.

Prevalence and treatment of dyslipidemia in Canadian primary care: a retrospective cohort analysis.

BACKGROUND: Dyslipidemia is an important modifiable risk factor for cardiovascular disease (CVD). Studies suggest that dyslipidemia is underdiagnosed and undertreated in Canada. OBJECTIVE: The objective of this study was to describe dyslipidemia prevalence, patient characteristics, and lipid-lowering treatment (LLT) patterns in a cohort representing Canadian primary care practice. METHODS: In this retrospective cohort analysis, the Southwestern Ontario database (which comprises data from >150,000 adult patients in rural and urban primary care practices) was used as the data source. Male and female patients with data available from 4 physician visits were included; data were captured quarterly between April 2000 and December 2003 and included demographic and lifestyle information, CVD risk factors, and cardiovascular drug treatments. Data gathered included clinical diagnoses at each visit, symptoms corroborating the diagnoses, clinical data (eg, blood pressure, smoking status, height, weight, fitness level), medications (including name, dose, duration, and quantity prescribed), and diagnostic test results and laboratory analyses. For the purposes of this study, a patient was considered to have dyslipidemia if >/=1 of the following conditions was met: (1) physician-diagnosed hyperlipidemia or hypercholes terolemia; (2) at least 1 measurement of low-density lipoprotein cholesterol (LDL-C) or total cholesterol: high-density lipoprotein cholesterol (TC:HDL-C) ratio greater than the recommended targets based on 10-year coronary artery disease (CAD) risk; and/or (3) at least 1 prescription for a lipid-lowering drug. RESULTS: A total of 49,667 patients were included in the study cohort. Dyslipidemia was identified in 6961 (14.0%) patients. Of patients with dyslipidemia, more were untreated (63.2%) than treated (36.7%) with LLTs, with women receiving treatment less often than men (P < 0.001). Of those treated, 47.2% had disease that was not adequately controlled, with fewer treated women having controlled disease than treated men (P < 0.017). Patients with dyslipidemia fell mostly into very-high-risk (45.7%) or low-risk (31.1 %) categories for CAD. A total of 73.0% of treated patients were prescribed monotherapy with a 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitor (statin); of starin prescriptions, most were for atorvastatin (51.8%) or simvastatin (29.4%). Initial LDL-C levels and initial TC:HDL-C ratios were statistically similar between patients prescribed atorvastatin and those prescribed simvastatin. CONCLUSION: Based on the results of this retrospective cohort analysis, dyslipidemia prevalence in Canadian primary care is high, and despite clinical evidence and treatment guidelines, dyslipidemia is largely untreated in family practice, suggesting a gap in care.

Improving management of musculoskeletal disorders in primary care: the Joint Adventures Program.

Musculoskeletal disorders represent a large and growing clinical challenge to primary care clinicians. Unfortunately, there appears to be a gap in current training and continuing education to meet this challenge. We used script concordance within a continuing medical education program entitled "Joint Adventures" to assist family physicians to acquire the knowledge, skills, and tools they need to improve their management of musculoskeletal disorders. Program workshops were coordinated through a national continuing education program of the College of Family Physicians of Canada. A group of 54 experts in musculoskeletal disorders including family physicians, rheumatologists, and orthopedists developed cases for six areas of management that were identified by family physicians during a needs survey delivered at a national scientific congress in primary care. Script concordance methodology was used in the Joint Adventures workshop to address knowledge gaps or lack of group consensus in the six areas including (1) diagnosis of osteoarthritis, (2) treatment and management of osteoarthritis, (3) treatment and management of rheumatoid arthritis, (4) diagnosis and treatment of back pain, (5) diagnosis and treatment of fibromyalgia and diagnosis, and (6) treatment of shoulder pain. Each workshop session included 5-30 family physicians, a specialist expert, and a family physician facilitator. Before each session, a group needs assessment was conducted to identify which one or two of the six cases would be used. Perceived knowledge and skill acquisition, self-assessed change in practice, and satisfaction with the program were measured at the conclusion of each session and again at 3 months post program. All programs were delivered from March 2003 to September 2005. Six hundred and fifty family physicians from across Canada completed the program. In general, participants reached concordance with each case. Measures of knowledge and skill acquisition and self-assessed change in practice were significantly improved with high rates of program satisfaction. The Joint Adventures program provided family physicians with knowledge and skills that changed their care of musculoskeletal disorders. This was achieved using consensus that was sensitive to local needs. Further use should be evaluated in other areas of medical practice as well.

Awareness and misconception of hypertension in Canada: results of a national survey.

BACKGROUND: The Canadian Heart Health Surveys were the last Canadian population-based physical measures surveys (conducted between 1988 and 1992) that determined that hypertension in Canada was poorly managed. Hypertension was undetected in almost one-half of all hypertensive Canadians surveyed, and only 13% of those with hypertension were treated and controlled to recommended blood pressure targets. The reasons for poor control are likely multifactorial; however, a lack of public awareness and understanding of hypertension may contribute to the epidemic of uncontrolled hypertension in Canada. METHODS: A national telephone survey was conducted comprising 1001 randomly selected men and women older than 40 years of age to determine the level of public awareness, understanding and misconception of hypertension in Canada. The survey was balanced for region, age and sex. RESULTS: Thirty-four per cent of respondents had been diagnosed with high blood pressure or hypertension by a health care professional, but only 58% of respondents had ever discussed their blood pressure with a physician, and only 44% were able to identify their own blood pressure or differentiate blood pressure levels considered to be above or below recommended targets. Overall, respondents had a poor understanding of the consequences of high blood pressure or hypertension. The majority were unaware of the association between hypertension and heart disease (80%), heart attack (66%), kidney disease (98%), damage to blood vessels (95%) and premature death (74%). Respondents also had limited knowledge of lifestyle issues affecting hypertension, despite 44% indicating that they were overweight and 18% identifying themselves as smokers. Almost two-thirds (63%) thought hypertension had clearly identifiable signs or symptoms, although they believed that hypertension was not a serious medical condition. Most respondents (59%) falsely believed that they would not develop hypertension and 38% thought that they would be able to control hypertension without the aid of a physician if they did have hypertension. CONCLUSIONS: While hypertension-related complications are preventable, lack of public awareness and misconceptions about hypertension and hypertensive complications are common and may, in part, be associated with ongoing inadequate Canadian awareness, treatment and control rates for hypertension. Increasing public awareness of hypertension using public education and health provider strategies should be a high national health priority.

Muscle fiber number in the biceps brachii muscle of young and old men.

We have compared the number of muscle fibers in the biceps brachii muscle (BB) of six old men (82.3 +/- 4.3 years) and six young men (21.2 +/- 1.9 years). Muscle fiber number was estimated by dividing the maximal area of the BB, determined with magnetic resonance imaging, by the mean fiber area of the BB determined in a muscle biopsy. The percentage of type II fibers in the BB ( approximately 60%) and the type I fiber area were not different between the groups. The BB area (-26%), type II fiber area (-24%), mean fiber area (-20%), and maximal voluntary contraction strength (MVC) of the elbow flexor muscles (-27%) were lower in the old than young group. However, the estimated number of muscle fibers was not significantly different between the young (253000) and old (234000) men. Consequently, the smaller BB area of the old men could be explained primarily by a smaller type II fiber size. These findings suggest that old age is not associated with a reduced number of muscle fibers in the BB. The relative contribution of a reduction in fiber number to age-related muscle atrophy may be muscle-dependent.

Lifestyle interventions for type 2 diabetes. Relevance for clinical practice.

OBJECTIVE: To review evidence from literature on type 2 diabetes pertinent to physical activity and diet and lifestyle modification, and to determine the relevance of this evidence to clinical practice. QUALITY OF EVIDENCE: Direct (level I) evidence supports interventions for physical activity and diet modification for primary prevention and management of type 2 diabetes. Few studies examine the effectiveness of primary health care providers' making such interventions. MAIN MESSAGE: Family physicians have an important role in identifying people at risk of developing type 2 diabetes and managing those diagnosed with the disease, yet they struggle to deliver practice-based interventions that promote sustainable behaviour change among their patients. CONCLUSION: It is evident that supporting patients to make changes in their physical activity and dietary habits can prevent onset of type 2 diabetes. Translating this finding into effective recommendations for clinical practice requires further effort and evaluation.