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To evaluate safety and the effects of a unsupervised physical activity program (USPAP) over blood pressure (BP), physical fitness (PF) and quality of life (QL) of elderly hypertensive patients.
The present study was approved by the Human and Animal Ethics Committee of the institution and the participants were only randomized to participate after having signed the informed consent form.
A population of elderly hypertensive patients registered at a reference center for hypertension treatment was selected. The sample size was calculated considering a test power of 80% with significance level of 5% and estimating a difference to be observed within the BP values of 7 mmHg for systolic blood pressure (SBP) and 4 mmHg for diastolic blood pressure (DBP). The sample calculated was 25 participants in each group being selected 20% more in case of losses.
An electronic chart was created with numbers for the patients that were randomized into control (CG) and intervention groups (IG).
The IG was included in an USPAP and the control group was kept under the usual care of the service that includes orientation to perform PA according to the World Health Organization recommendations.
Before the beginning of the protocol clinical and laboratorial data collected included: weight, height, waist circumference, fasting glucose, hemoglobin A1C and lipid profile.
In addition to that health-related quality of life was assessed with the Short Form 36-item Health Survey (SF-36). The SF-36 Questionnaire includes one multi-item scale that assesses eight health concepts: 1) functional capacity; 2) physical aspects; 3) pain; 4) general health status; 5) vitality; 6) social aspects; 7) emotional aspects; and 8) mental health. The score of each health concept ranges from 0 to 100, in which zero means the worst general health state and one hundred the best health state.
All patients underwent physical tests to evaluate their physical fitness: cardiorespiratory fitness test (Cooper Test) and abdominal resistance test. Patients were classified according to the Physical Aptitude Classification Tables for Users of Public Parks.
The BP was assessed with office BP measurements using OMRON - HEM 705 CP® semi-automatic devices according to the VI Brazilian Hypertension Guidelines (BHG). Home blood pressure was also performed following the same technics of office measurements and according to the III Brazilian Guidelines of Home Blood Pressure Monitoring with 3 measurements in the morning fasting and 3 at night before dinner in four consecutive days.
The physical activity prescriptions were individualized so that the patients would have no doubts regarding execution when performing the exercise without the presence of the prescribing professional. The prescribed physical activity was aerobic and walking was the chosen one. The activity was prescribed in a planned, structured and repetitive way aiming to maintain or improve one or more components of physical fitness. To achieve those goals patients attended to 2 supervised sessions that took place in a one week period in non-consecutive days. They were instructed to perform training at least 3 times a week during 30 minutes or more with a moderate intensity of 40 to 60% of their reserve heart rate which mean walking slightly breathless but being able to pronounce complete phrases according to the VI BHG recommendations. The total number of sessions prescribed was 36 throughout the 12 weeks. The minimum of 30 sessions was needed so the results could be validated.
Health educational strategies were used simultaneously to data collection to improve adherence of both groups. Motivational actions were used specific for the IG. Weekly phone calls were carried out to the IG in order to know about the number of sessions performed that week, the duration of the practice and the total number of steps of each session. All participants received a pedometer and a diary to register activities.
Safety was assessed considering: need to interrupt training due to lesions, falls, incapacitating pain or acute events related to training that would require medical assistance.
After 12 weeks all participants were reevaluated and all procedures were repeated to evaluate the effects of the intervention.
Data collected was analyzed with software Statistical Package of Social Science, version 23.0, Chicago, USA. Qualitative variables were presented in absolute numbers and percentages with the comparison between them being made with Qui Square Test or Exact Fisher Test. Proportion comparison in the groups was performed applying Wilcoxon Test. Quantitative variables were initially analyzed in terms of its distribution with Shapiro-Wilk test. Mean variables comparison was performed with T-Student test for paired and unpaired samples. The results were presented as mean values and standard deviation and p value < 0,05 was considered significant.
Allocation: Randomized, Intervention Model: Parallel Assignment, Masking: Single Blind (Subject), Primary Purpose: Treatment
Unsupervised exercise program, Physical fitness and quality of life
Universidade Federal de Goias
Published on BioPortfolio: 2016-11-30T15:45:26-0500
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Physical activity which is usually regular and done with the intention of improving or maintaining PHYSICAL FITNESS or HEALTH. Contrast with PHYSICAL EXERTION which is concerned largely with the physiologic and metabolic response to energy expenditure.
A generic concept reflecting concern with the modification and enhancement of life attributes, e.g., physical, political, moral and social environment; the overall condition of a human life.
A measure of human size, shape, proportion, composition, maturation, and gross function; in relation to body movement, physical exercise, fitness, and performance.
Controlled physical activity, more strenuous than at rest, which is performed in order to allow assessment of physiological functions, particularly cardiovascular and pulmonary, but also aerobic capacity. Maximal (most intense) exercise is usually required but submaximal exercise is also used. The intensity of exercise is often graded, using criteria such as rate of work done, oxygen consumption, and heart rate.
Alternating sets of exercise that work out different muscle groups and that also alternate between aerobic and anaerobic exercises, which, when combined together, offer an overall program to improve strength, stamina, balance, or functioning.