Physical activity readiness in patient withdrawals from cardiac rehabilitation.

BACKGROUND: Adherence to cardiac rehabilitation (CR) programmes may be an important element for improving and maintaining physical activity (PA) behaviour in secondary prevention. Little is known about the PA behaviour in patients who have withdrawn from CR programmes. Therefore, a study was carried out to identify the reasons for withdrawal and the stage of PA readiness in those patients previously engaged in a Leeds-based community CR programme. METHODS: A cross-sectional study was conducted using a telephone questionnaire to determine causes of withdrawal. A questionnaire based on the transtheoretical model of change was used to assess changes in PA readiness in these patients. RESULTS: 101 withdrawn patients (mean age = 61 years; 72% male) were identified. It was found that 20 patients had relapsed beyond baseline (preparation phase) into pre-contemplation and contemplation phases and 15 reported they were in the preparation phase. However, the majority of patients remained in the action (18) and maintenance (48) phases of the transtheoretical model. Patients reported the following reasons for withdrawal: joined other facilities (16%); injury or illness (3%); family demands (7%); work demands (14%); lack of motivation (4%); lack of enjoyment (11%); lack of transport (10%); lack of time (10%); too expensive (6%); too crowded (4%). CONCLUSION: 66% of patients who had withdrawn from a phase IV CR programme remained in an advanced stage of PA readiness. Drop-out was due to a combination of financial, physical and lifestyle factors.

What is the relationship between exercise and metabolic abnormalities? A review of the metabolic syndrome.

Prevention of the metabolic syndrome and treatment of its main characteristics are now considered of utmost importance in order to combat the epidemic of type 2 diabetes mellitus and to reduce the increased risk of cardiovascular disease and all-cause mortality. Insulin resistance/hyperinsulinaemia are consistently linked with a clustering of multiple clinical and subclinical metabolic risk factors. It is now widely recognised that obesity (especially abdominal fat accumulation), hyperglycaemia, dyslipidaemia and hypertension are common metabolic traits that, concurrently, constitute the distinctive insulin resistance or metabolic syndrome. Cross-sectional and prospective data provide an emerging picture of associations of both physical activity habits and cardiorespiratory fitness with the metabolic syndrome. The metabolic syndrome, is a disorder that requires aggressive multi-factorial intervention. Recent treatment guidelines have emphasised the clinical utility of diagnosis and an important treatment role for 'therapeutic lifestyle change', incorporating moderate physical activity. Several previous narrative reviews have considered exercise training as an effective treatment for insulin resistance and other components of the syndrome. However, the evidence cited has been less consistent for exercise training effects on several metabolic syndrome variables, unless combined with appropriate dietary modifications to achieve weight loss. Recently published randomised controlled trial data concerning the effects of exercise training on separate metabolic syndrome traits are evaluated within this review. Novel systematic review and meta-analysis evidence is presented indicating that supervised, long-term, moderate to moderately vigorous intensity exercise training, in the absence of therapeutic weight loss, improves the dyslipidaemic profile by raising high density lipoprotein-cholesterol and lowering triglycerides in overweight and obese adults with characteristics of the metabolic syndrome. Lifestyle interventions, including exercise and dietary-induced weight loss may improve insulin resistance and glucose tolerance in obesity states and are highly effective in preventing or delaying the onset of type 2 diabetes in individuals with impaired glucose regulation. Randomised controlled trial evidence also indicates that exercise training decreases blood pressure in overweight/obese individuals with high normal blood pressure and hypertension. These evidence-based findings continue to support recommendations that supervised or partially supervised exercise training is an important initial adjunctive step in the treatment of individuals with the metabolic syndrome. Exercise training should be considered an essential part of 'therapeutic lifestyle change' and may concurrently improve insulin resistance and the entire cluster of metabolic risk factors.