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1.
Adv Exp Med Biol ; 1232: 223-229, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31893414

RESUMO

The aim of this study was to compare muscle O2 dynamics during exercise between aerobic capacity-matched overweight and normal-weight adults. Overweight women (OW, n = 9) and normal-weight women (NW, n = 14) performed graded treadmill exercise until exhaustion. Muscle O2 saturation (SmO2) and relative changes from rest in deoxygenated hemoglobin concentration (∆deoxy-Hb) and total hemoglobin concentration (∆total-Hb) were monitored continuously at gastrocnemius medialis muscle by near infrared spatial resolved spectroscopy. Significantly higher SmO2 and lower ∆deoxy-Hb and ∆total-Hb were observed in OW compared with NW. Pulmonary O2 uptake (VO2) normalized by fat-free mass was matched between groups. In both groups, peak VO2 was significantly correlated with change in SmO2 and ∆deoxy-Hb. Our findings suggest that both muscle blood volume and deoxygenation were lower in overweight adults, compared to aerobic capacity-matched normal-weight adults. Moreover, lowered muscle O2 extraction was related to peak VO2 in overweight adults, as well as in normal-weight adults.


Assuntos
Exercício , Músculo Esquelético , Sobrepeso , Consumo de Oxigênio , Adulto , Teste de Esforço , Feminino , Hemoglobinas , Humanos , Músculo Esquelético/metabolismo , Sobrepeso/metabolismo
2.
Adv Exp Med Biol ; 1232: 231-237, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31893415

RESUMO

Near-infrared spectroscopy (NIRS) during cardiopulmonary exercise test (CPX) has shown a correlation between prefrontal cortex (PFC) oxygenated hemoglobin (O2Hb) level and negative affective responses. We hypothesized that O2Hb changes differ between the PFC and motor-related areas. This study investigated changes in hemoglobin levels in the PFC and motor-related areas during CPX. Twelve young healthy adults participated in this study. They performed a CPX after 4 min of rest and 4 min of warming up. Cortical O2Hb, deoxygenated hemoglobin (HHb), and total hemoglobin (THb) levels were measured with NIRS during CPX. Regions of interest (ROI) were the PFC, premotor area (PMA), supplementary motor area (SMA), and primary motor cortex (M1). The anaerobic threshold (AT), respiratory compensation (RC), and peak oxygen uptake (Peak) points were determined. The rest, AT, RC and Peak points of O2Hb, HHb, and THb were averaged over 5 s; hemoglobin slopes, from RC to the Peak points, were calculated to compare functional changes in cortical oxygenation. Average values of O2Hb, HHb, and THb in each ROI were compared among the rest, AT, RC, and Peak points. Average values of hemoglobin slopes, from RC to Peak points, were compared among ROIs using Bonferroni multiple comparisons. The HHb of all ROIs significantly increased at Peak point, compared with at the AT point. THb of the PFC, PMA, and SMA significantly increased at the RC or Peak points, compared with at the rest point. Hemoglobin slopes, from RC to Peak, showed no significant differences among ROIs. Each ROI exhibited similar changes, regardless of cortical function.


Assuntos
Córtex Motor , Oxigênio , Córtex Pré-Frontal , Espectroscopia de Luz Próxima ao Infravermelho , Adulto , Teste de Esforço , Feminino , Humanos , Masculino , Córtex Motor/metabolismo , Oxigênio/metabolismo , Consumo de Oxigênio , Oxiemoglobinas/metabolismo , Córtex Pré-Frontal/metabolismo , Adulto Jovem
3.
Adv Exp Med Biol ; 1232: 239-244, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31893416

RESUMO

Near-infrared time-resolved spectroscopy (NIRTRS) can quantitatively evaluate mean optical path length (MPL). Since an increase in optical absorbers in the NIR region (e.g. an increase in deoxygenated hemoglobin during exercise) would shorten the MPL, the NIRS measurement area may vary depending on physical and physiological characteristics of the measurement region and/or the exercise intensity. The aim of this study was to examine the changes in MPL measured by NIRTRS during ramp cycling exercise between fat layer thickness-matched subjects with different aerobic capacities. Healthy control (CON, n = 8) and endurance-trained males (TR, n = 8) performed ramp cycling exercise until exhaustion. Deoxygenated hemoglobin concentration (Deoxy-Hb), total hemoglobin concentration (Total-Hb) and oxygenated hemoglobin concentration (Oxy-Hb) were evaluated by a three-wavelength NIRTRS system. MPL in each wavelength (MPL760, MPL800 and MPL830) was monitored continuously. With increasing exercise intensity, Total- and Deoxy-Hb significantly increased and Oxy-Hb decreased in both groups. Total- and Oxy-Hb during exercise were significantly higher in TR than CON (P < 0.05, P < 0.01, respectively). Furthermore, Deoxy-Hb also tended to be higher in TR than CON (P = 0.07). In addition, MPL at all wavelengths significantly shortened with an increase in exercise intensity, with no differences between CON and TR. In particular, MPL760 at peak exercise shortened more than 10% compared to the start of exercise in both groups, even though MPL830 decreased only a few per cent. These findings suggest that the NIRS measurement area may be reduced during ramp cycling exercise due to shortened MPL. Additionally, the changes in MPL may be especially greater at 760 nm than at the other wavelengths due to greater changes in Deoxy-Hb during exercise. Furthermore, this study indicates that the measurements of muscle deoxygenation using continuous-wave NIRS can be less accurate since they are significantly affected by changes in the optical path length.


Assuntos
Exercício , Consumo de Oxigênio , Músculo Quadríceps , Adolescente , Adulto , Estudos de Casos e Controles , Teste de Esforço , Humanos , Masculino , Oxigênio/metabolismo , Oxiemoglobinas/metabolismo , Músculo Quadríceps/metabolismo , Espectroscopia de Luz Próxima ao Infravermelho , Adulto Jovem
5.
Sports Biomech ; 19(1): 1-25, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-29781788

RESUMO

The use of isometric strength testing, particularly the isometric mid-thigh pull (IMTP) has increased dramatically over the last decade. The IMTP and isometric squat (ISqT) provide one aspect of performance monitoring with variables such as peak force and rate of force development being derived from the force-time curve. The reliability of some of these variables is conflicting in the literature, and the reporting of the reliability is not standardised across the research. The majority of research only reports intraclass correlation coefficients with very few studies reporting coefficient of variation and 90% confidence intervals. Additionally, methods used to calculate variables from the force-time curve differ across studies. An aim of muscle strength testing is to provide normative values for specific sports, allowing coaches to distinguish between performance levels or evaluate the effects of training on performance. This narrative review aims to evaluate studies that have researched the reliability and/or reported normative data for both tests. Additionally, the testing protocols and the force-time curve analysis techniques utilised are discussed, concluding with practical applications for coaches on the uses and limitations of these tests. Results demonstrate that peak force is the most reliable measure and can be used to determine maximum strength capabilities.


Assuntos
Teste de Esforço/métodos , Força Muscular/fisiologia , Coxa da Perna/fisiologia , Levantamento de Peso , Fenômenos Biomecânicos , Humanos , Contração Isométrica/fisiologia , Valores de Referência , Reprodutibilidade dos Testes , Esportes/fisiologia
6.
Kardiologiia ; 59(11): 39-47, 2019 Dec 13.
Artigo em Russo | MEDLINE | ID: mdl-31849298

RESUMO

PURPOSE: To: 1) optimize algorithm of stress echocardiography (s-Echo) with intravenous adenosine triphosphate (ATP) infusion taking into account pharmacokinetics and pharmacodynamics of ATP in human body, 2) test new algorithm in patients with coronary and other heart diseases. MATERIALS AND METHODS: In order to determine spectrum of factors influencing the results of stress test with ATP we inspected main scientific data bases and found 48 publications on ATP application for diagnostic purposes. Analysis of these publications allowed us to optimize algorithm of ATP s-Echo. Optimized algorithm was tested on 26 subjects, who underwent ATP 4D strain-stress-echocardiography of the left ventricle. RESULTS AND DISCUSSION: Optimized algorithm has three stages: registration of Echo data sets before, at the time of ATP infusion, and after 5 min of ATP infusion termination. Registration of Echo parameters at the second stage must begin not earlier than 3 min after the onset of ATP infusion and only in the presence of signs of coronary vasodilation. We think that the main indirect criterion of submaximal coronary vasodilation is 5 mm Hg or more decrease in systolic blood pressure (SBP), but not below SBP level of 90 mm Hg. Initial dose of ATP is 140 µg/kg/min. If after 2 min of infusion SBP do not diminish we increase the infusion rate at first to 175 and then to 210 µg/kg/min. While testing new algorithm in all cases we have achieved criteria of effective vasodilation. Mean SBP decrease was 16.4±13.7 mm Hg, heart rate increase - 12.7±8.1 bpm. In all patients we obtained interpretable 4D LV Echo data sets for visual analysis of local contractility and automatic strain analysis. CONCLUSION: Optimization of ATP s-Echo algorithm was performed. Safety and efficacy of optimized algorythm for registration of echo data was demonstrated. New ATP infusion algorithm can also be recommended for testing with other cardiac imaging modalities in evaluation of myocardial perfusion and contractility (SPECT, CT, MRI, PET).


Assuntos
Teste de Esforço , Trifosfato de Adenosina , Algoritmos , Angiografia Coronária , Ecocardiografia , Humanos
7.
Zhongguo Ying Yong Sheng Li Xue Za Zhi ; 35(4): 331-335, 2019 Jul 28.
Artigo em Chinês | MEDLINE | ID: mdl-31701717

RESUMO

OBJECTIVE: To investigate the feasibility of applying the measure of energy cost, utilized widely in cyclic sports, in table tennis multi-ball practice. METHODS: Eleven collegiate table tennis players volunteered (18±1 yrs, 177±2 cm, 71±3 kg, approximately 10 yrs' training experience) to participate in one graded exercise test on treadmill, and two step tests (forehand and backhand, 3 min × 6, 35~85 stroke/min). A portable spirometric system and heart rate monitor were utilized for the three trials. Earlobe blood samples were collected and analyzed prior to and post the test. Energy cost was calculated for one stroke at each stroke frequency. RESULTS: The energy cost of loop drive multi-ball practice was decreased with increased stroke frequency (P<0.05). The energy cost of forehand loop drive was higher than backhand, with the difference significant at 35, 45, 55, 65, and 85 stroke·min-1 (P<0.05). The function between energy cost and frequency were y=166.4x-0.731 (R2=0.9731), and y=33.21x-0.392 (R2=0.8423), respectively, where y was energy cost, and x was stroke frequency. CONCLUSION: The measure of energy cost utilized in cyclic sports could be applied to evaluate the energy expenditure in table tennis multi-ball practice of single technique, and indicate the stroke efficiency of table tennis muti-ball practice with different stroke frequencies.


Assuntos
Metabolismo Energético , Tênis/fisiologia , Adolescente , Teste de Esforço , Humanos , Adulto Jovem
8.
Medicine (Baltimore) ; 98(45): e17880, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31702659

RESUMO

BACKGROUND: Osteoarthritis (OA) is a degenerative disease that not only causes knee pain in older adults, but also has an adverse effect on walking. Therefore, intervention for older patients with OA is important. To investigate the immediate effects of kinesiology taping (KT) on the pain and gait function of the older adults with knee OA. METHODS: This study enrolled 10 older adults individuals living in the community who were diagnosed with knee OA. All participants were assessed for knee pain, walking ability, and balance before and after application of knee KT. Knee pain was assessed in resting and walking conditions using the visual analog scale. Walking and balance were assessed using a 10-m walking test and a timed up and go test. RESULTS: In the present study, KT significantly improved gait and balance with reduction in knee pain during walking than non-KT (P < .05). CONCLUSIONS: This study demonstrated that knee KT has a positive effect on pain reduction and walking and balance ability of the older adults with OA. Therefore, this study suggests that KT can be used as an intervention to relieve knee pain and aid walking and balance ability in the older adult.


Assuntos
Fita Atlética , Marcha/fisiologia , Osteoartrite do Joelho/terapia , Manejo da Dor/métodos , Idoso , Estudos Controlados Antes e Depois , Teste de Esforço/métodos , Humanos , Pessoa de Meia-Idade , Equilíbrio Postural/fisiologia , Resultado do Tratamento , Escala Visual Analógica
9.
Medicine (Baltimore) ; 98(38): e17076, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31567943

RESUMO

Although accumulated epidemiological evidence indicates that a good physical fitness level may prevent the development of sporadic colorectal cancer (CRC), few studies have examined the effect of physical fitness level on familial adenomatous polyposis (FAP). This cross-sectional study aimed to examine the relationship between physical fitness and CRC development in patients with FAP.A total of 119 patients (54 male; 65 female) with FAP, aged 17 to 73 years, underwent a step test to induce exercise stress. Predicted maximal oxygen uptake (VO2max) was calculated for each patient by using heart rate as an index of physical fitness. The association of VO2max with the presence or absence of CRC and polyp diameter was examined. Patients with FAP were divided into 3 categories according to their VO2max (high, medium, and low). The association between maximum polyp size and VO2max among the patients with FAP without a history of colectomy was examined.The risk of CRC was significantly higher in the low VO2max group than in the high VO2max group (odds ratio = 4.07; 95% confidence interval, 1.02-16.26). The maximum polyp diameter was significantly negatively correlated with the VO2max among the patients with FAP without a history of colectomy (r = -.44, P = .01). In the multiple linear regression analysis, maximum polyp diameter was independently correlated with VO2max.Our results suggest a preventive association between physical fitness and CRC development or colorectal adenoma growth exists in patients with FAP.


Assuntos
Adenoma/prevenção & controle , Polipose Adenomatosa do Colo/complicações , Neoplasias Colorretais/prevenção & controle , Aptidão Física , Adenoma/etiologia , Adolescente , Adulto , Idoso , Neoplasias Colorretais/etiologia , Estudos Transversais , Teste de Esforço , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Fatores de Risco , Adulto Jovem
10.
Anticancer Res ; 39(10): 5551-5557, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31570449

RESUMO

BACKGROUND/AIM: Digestive system cancers are the leading cause of cancer mortality and have poor survival particularly in men. The study aimed to assess the association between pre-diagnosis cardiorespiratory fitness (CRF) and cancer mortality in a pilot sample of men who developed digestive system cancers. PATIENTS AND METHODS: Pre-diagnosis CRF (treadmill exercise test) was assessed in 342 men (68.9±21.8 years) who developed digestive system cancers during 6.7±5 years from baseline evaluation. Cox multivariable hazard models were analyzed for total cancer mortality. RESULTS: During 7.2±5 years follow-up from baseline, 120 participants died from cancer. Compared to low CRF, moderate and high CRF levels were associated with 57% [0.43, 95%CI=0.24-0.74] and 73% [0.27, 95%CI=0.12-0.59] reduced risks for cancer mortality, respectively (p trend=0.002). Survival time from baseline was longer among those with moderate [13.5 (range=12.1-14.9) years] and high [16.1 (range=14.0-18.2) years] compared to low CRF [7.9 (range=5.7-10.1) years]. CONCLUSION: Higher pre-diagnosis CRF is independently associated with lower risk of cancer mortality and longer survival in men who later developed digestive system cancers.


Assuntos
Aptidão Cardiorrespiratória/fisiologia , Neoplasias do Sistema Digestório/mortalidade , Neoplasias do Sistema Digestório/fisiopatologia , Idoso , Índice de Massa Corporal , Teste de Esforço/métodos , Humanos , Masculino , Projetos Piloto , Modelos de Riscos Proporcionais , Estudos Prospectivos , Fatores de Risco
11.
Kardiologiia ; 59(10): 23-30, 2019 Oct 14.
Artigo em Russo | MEDLINE | ID: mdl-31615385

RESUMO

AIM: to compare diagnostic accuracy of exercise treadmill testing and stress echocardiography in the diagnosis of stable coronary artery disease (CAD) in patients aged >70 years. MATERIALS AND METHODS: The study included 390 patients aged >70 years with suspected stable ischemic heart disease, who underwent elective coronary artery angiography (CAG). Exercise treadmill testing (ETT) according to the modified Bruce protocol was carried out in 189 patients (48 %), bicycle stress echocardiography - in 179 patients (46 %). Initially we determined the prevalence of angiographically significant CAD according to the gender and chest pain character, and identified persons in whom stress testing was appropriate. After that diagnostic accuracy of both tests was evaluated in patients with atypical angina and non-anginal chest pain. RESULTS: Among 72 patients with atypical angina and non-anginal pain who underwent ETT and had unequivocal results, 38 (53 %) had obstructive CAD. ETT for detection of obstructive CAD had sensitivity 79 %, specificity 82 %, positive likelihood ratio (LR+) 4.4, and negative likelihood ratio (LR-) 0.3. Positive result increased probability of obstructive CAD from 53 % to 83 %, negative result reduced probability of obstructive CAD to 25 %. Among 111 patients with atypical angina and non-anginal pain who underwent stress echocardiography and had unequivocal results, 69 (62 %) had obstructive CAD. Sensitivity, specificity, LR+, and LR- of stress echocardiography were equal to 89 %, 95 %, 17.8, and 0.1, respectively. Positive result increased probability of obstructive CAD from 62 % to 95 %, negative result reduced probability of obstructive CAD to 16 %. CONCLUSION: bicycle stress echocardiography was found to be more accurate than ETT to rule in or rule out obstructive CAD in patients aged ≥ 70 years with atypical angina and non-anginal pain.


Assuntos
Doença da Artéria Coronariana , Ecocardiografia sob Estresse , Idoso , Angina Pectoris , Angiografia Coronária , Teste de Esforço , Humanos
12.
Medicine (Baltimore) ; 98(39): e17105, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31574809

RESUMO

We aimed to determine the accuracy and failure of OAK device, an automated screening, for the assessment of fall risk in a prospective cohort of healthy adults aged over 65 years. The algorithm for fall risk assessment of the centers for disease control and prevention (CDC) was used as reference standard. Of the 183 individuals recruited, the CDC algorithm classified 80 as being at moderate/high risk and 103 at low risk of falling. OAK device failure incidence was 4.9% (confidence interval [CI] upper limit 7.7%), below the preset threshold for futility-early termination of the study (i.e., not above 15%). The OAK device showed a sensitivity of 84% and a specificity of 67% (receiver operating characteristic [ROC] area 82%; 95% confidence interval [CI] 76-88%), not reaching the preplanned target sensitivity (not lower than 85%). Diagnostic accuracy was not far from the sensitivity levels similar to those obtained with other fall risk assessment. However, some limitations can be considered.ClinicalTrials.gov identifier: NCT02655796.


Assuntos
Acidentes por Quedas , Teste de Esforço/métodos , Programas de Rastreamento/métodos , Medição de Risco/métodos , Idoso , Desenho de Equipamento , Falha de Equipamento , Teste de Esforço/instrumentação , Feminino , Humanos , Masculino , Programas de Rastreamento/instrumentação , Estudos Prospectivos , Curva ROC , Sensibilidade e Especificidade
13.
Medicine (Baltimore) ; 98(39): e17195, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31574826

RESUMO

The aim of this study was to evaluate comparative clinical outcomes of discordant electrocardiographic (ECG) and echocardiographic (Echo) findings compared with concordant findings during treadmill exercise echocardiography in patients with chest pain and no history of coronary artery disease (CAD).A total of 1725 consecutive patients who underwent treadmill echocardiography with chest pain and no history of CAD were screened. The patients were classified into 4 groups: ECG-/Echo- (negative ECG and Echo), ECG+/Echo- (positive ECG and negative Echo), ECG-/Echo+, and ECG+/Echo+. Concomitant CAD was determined using coronary angiography or coronary computed tomography. Major adverse cardiac events (MACEs) were defined as a composite of coronary revascularization, acute myocardial infarction, and death.MACEs were similar between ECG-/Echo- and ECG+/Echo- groups. Compared with ECG+/Echo- group, ECG-/Echo+ group had more MACEs (adjusted hazard ratio [HR] adjusted by clinical risk factors [95% confidence interval {CI}], 3.57 [1.75-7.29], P < .001). Compared with ECG+/Echo+ group, ECG-/Echo+ group had lower prevalence of concomitant CAD and fewer MACEs (HR, 0.49 [0.29-0.81], P = .006).Positive exercise Echo alone during treadmill exercise echocardiography had worse clinical outcomes than positive ECG alone, and the latter had similar outcomes to both negative ECG and Echo. Positive exercise Echo alone also had better clinical outcomes than both positive ECG and Echo. Therefore, exercise Echo findings might be superior for predicting clinical outcomes compared with exercise ECG findings. Additional consideration of ECG findings on positive exercise Echo will also facilitate better prediction of clinical outcomes.


Assuntos
Dor no Peito/fisiopatologia , Doença da Artéria Coronariana/fisiopatologia , Ecocardiografia/estatística & dados numéricos , Eletrocardiografia/estatística & dados numéricos , Infarto do Miocárdio/fisiopatologia , Adulto , Idoso , Dor no Peito/complicações , Angiografia Coronária , Doença da Artéria Coronariana/etiologia , Exercício/fisiologia , Teste de Esforço , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Infarto do Miocárdio/etiologia , Prognóstico , Modelos de Riscos Proporcionais , Reprodutibilidade dos Testes , Fatores de Risco , Tomografia Computadorizada por Raios X
14.
Int J Sports Physiol Perform ; 14(9): 1159-1169, 2019 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-31575820

RESUMO

PURPOSE: Despite the volume of available literature focusing on marathon running and the prediction of performance, no single prediction equations exists that is accurate for all runners of varying experiences and abilities. Indeed the relative merits and utility of the existing equations remain unclear. Thus, the aim of this study was to collate, characterize, compare, and contrast all available marathon prediction equations. METHODS: A systematic review was conducted to identify observational research studies outlining any kind of prediction algorithm for marathon performance. RESULTS: Thirty-six studies with 114 equations were identified. Sixty-one equations were based on training and anthropometric variables, whereas 53 equations included variables that required laboratory tests and equipment. The accuracy of these equations was denoted via a variety of metrics; r2 values were provided for 68 equations (r2 = .10-.99), and an SEE was provided for 19 equations (SEE 0.27-27.4 min). CONCLUSION: Heterogeneity of the data precludes the identification of a single "best" equation. Important variables such as course gradient, sex, and expected weather conditions were often not included, and some widely used equations did not report the r2 value. Runners should therefore be wary of relying on a single equation to predict their performance.


Assuntos
Algoritmos , Desempenho Atlético , Comportamento Competitivo , Corrida , Antropometria , Atletas , Teste de Esforço , Humanos , Estudos Observacionais como Assunto , Condicionamento Físico Humano
15.
Medicine (Baltimore) ; 98(42): e17509, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31626108

RESUMO

To research the possible role of Tai Chi in preventing cardiovascular disease and improving cardiopulmonary function in adults with obesity aged 50 years and older.Between 2007 and 2012, 120 adults with obesity, aged 50 years and older, were divided into a Tai Chi group and a control group, with 60 participants in each group. The 2 groups were evaluated for weight, waist circumference, hip circumference, blood pressure (BP), body mass index, and incidence of chronic disease during follow-up monitoring.Two- and 6-year follow-up showed that the average BP in the Tai Chi group along with either the systolic or diastolic pressure decreased significantly compared to those in the control group (P < .001). Waist and hip circumference, weight, and body mass index in the Tai Chi group were significantly reduced compared to those in the control group (P < .001). The cardiopulmonary function of the control group and the Tai Chi group changed, with the cardiac index significantly higher in the Tai Chi group than in the control group (P < .05). The Tai Chi group had significantly higher levels of lung function, including vital capacity, maximal oxygen uptake, and total expiratory time, than the control group. The total incidence of complications and mortality in the Tai Chi group were much lower than those in the control group (P < .001). The incidence of cardiovascular and cerebrovascular disease in the Tai Chi group (16.67%) was lower than that in the control group (38.33%).Tai Chi is not only a suitable exercise for elderly people with obesity, but it can also help to regulate BP, improve heart and lung function in these individuals, as well as reduce the incidence of cardiovascular disease and other chronic diseases, helping to improve their quality of life.


Assuntos
Doenças Cardiovasculares/prevenção & controle , Obesidade/fisiopatologia , Tai Ji/métodos , Idoso , Pressão Sanguínea , Composição Corporal/fisiologia , Índice de Massa Corporal , Exercício/fisiologia , Teste de Esforço , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Obesidade/complicações , Fatores de Tempo , Resultado do Tratamento
16.
J Strength Cond Res ; 33(11): 3151-3161, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31658212

RESUMO

Bycura, DK, Dmitrieva, NO, Santos, AC, Waugh, KL, and Ritchey, KM. Efficacy of a Goal Setting and Implementation Planning Intervention on Firefighters' Cardiorespiratory Fitness. J Strength Cond Res 33(11): 3151-3161, 2019-The purpose of this study was to assess the effectiveness of a goal setting and implementation planning (GSIP) intervention on cardiorespiratory fitness among firefighters. Male career firefighters (N = 20) from a large municipal fire department were assigned to an intervention arm (n = 12) or passive control arm (n = 8) of a 14-week study involving cardiorespiratory exercise. The intervention consisted of GSIP coaching at baseline and support throughout the study. Cardiorespiratory fitness was assessed through a standardized physical protocol for firefighters (Candidate Physical Ability Test) at baseline, at 6 weeks, and at 14 weeks time points, using the Cosmed K4b portable metabolic system to measure physiological variables. Using intention-to-treat principles, we employed a 2-level multilevel model to examine the effect of intervention group on intercept and change over time on primary outcomes of interest: oxygen transport and utilization (VO2), heart rate (HR), and respiratory exchange ratio (R). Results demonstrated that the intervention and control groups both exhibited a significant increase in VO2 (B = 0.143, SE = 0.025, p < 0.001) and a decline in R (B = -0.003. SE = 0.001, p < 0.01) over the course of the study. Although both groups exhibited improvements on 2 of the 3 cardiorespiratory outcomes, subjects assigned to the intervention did not exhibit superior outcomes when compared to the control group. Given the improvements we observed in 2 out of 3 outcomes across both conditions, future research may consider testing effectiveness of interventions consisting of functional training exercises that closely translate to firefighting tasks over time periods sufficient to elicit aerobic metabolic adaptations.


Assuntos
Aptidão Cardiorrespiratória , Bombeiros , Metas , Adaptação Fisiológica , Adulto , Exercício , Teste de Esforço , Frequência Cardíaca/fisiologia , Humanos , Masculino , Pessoa de Meia-Idade , Consumo de Oxigênio
18.
Prensa méd. argent ; 105(9 especial): 601-606, oct 2019. tab
Artigo em Inglês | LILACS, BINACIS | ID: biblio-1046763

RESUMO

Adult and young highly skilled Greco-Roman wrestlers are trained using the same training program. The use of the standard models of testing loads and research methods for adult and young highly skilled wrestlers allowed to reveal significant differences in the level of their general and special training. A comparative analysis of the test data obtained from adult and young highly skilled wrestlers in adapting the cardiovascular system to the cycloergometric load and analyzer systems to the special power load has not yet been conducted for these athletes. The purpose of the study is to determine the informative value of diagnostic methods for determining the training of highly skilled Greco-Roman wrestlers of different age. The main results of the study are the substantiation of the informative value of tests and research methods, which most fully describe special training of wrestlers from different age groups. A lower level of strength performance and coordination abilities, increased fatigue of the central and neuromuscular systems, as well as intensity of the circulatory system adaptation during the adaptation to the testing load on the cycle ergometer were determined in the surveyed contingent of young athletes, compared with adult wrestlers. The used set of tests and research methods is informative for determining the training level of highly skilled wrestlers of different age. Conclusion. The use of complex diagnostics of cardiovascular and analyzer systems allows to determine the physical and functional body reserves of young and adult wrestlers and factors that limit performance, and necessitates the development of individual training programs for juniors in their sports improvement.


Assuntos
Humanos , Adolescente , Adulto , Exercício , Avaliação de Programas e Projetos de Saúde , Técnicas e Procedimentos Diagnósticos , Adaptação , Teste de Esforço , Esforço Físico , Atletas
20.
Int J Sports Med ; 40(12): 774-778, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31476784

RESUMO

We compared results of Special Judo Fitness Test (SJFT) performance of young athletes of two different age categories after correcting body mass (BM) variations by allometric scales. Thirty young judokas (14.2±3.6 years) belonging to two age categories underwent an SJFT: under 15 (U15) years old (12.1±2.4 years; 46.5±15.6 kg; 152.4±11.2 cm) and under 21 years old (U21) (18.2±0.8 years; 77.1±23.5 kg; 174.2±8.9 cm). Allometric exponents of -0.33 and 0.67 were used to correct the influence of BM variations on SJFT performance results. After correction using the -0.33 exponent, U21 showed a higher number of throws (TNT) than U15 (85.5±9.9 and 68.8±12.0, p<0.05, respectively), although the SJFT index had been similar between these groups (67.3±10.1 and 61.7±8.1, p>0.05, respectively). In contrast, TNT normalized by the 0.67 exponent was higher in U15 than U21 (1.55±0.29 and 1.17 ± 0.25, p<0.05, respectively). Likewise, the SJFT index was higher in U15 than in U21 when using the same exponent (1.55±0.29 and 1.17±0.25, p<0.05, respectively). In conclusion, the -0.33 exponent may be useful to remove the influence of BM variations, thus discriminating SJFT performance results in U15 and U21 judokas. Moreover, the 0.67 exponent may overestimate SJFT indices in low-age judokas.


Assuntos
Desempenho Atlético/fisiologia , Índice de Massa Corporal , Teste de Esforço/métodos , Artes Marciais/fisiologia , Aptidão Física/fisiologia , Adolescente , Criança , Feminino , Humanos , Masculino , Adulto Jovem
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