This study aim to evaluate the effects of 16 weeks of multicomponent training on postural control, cardiovascular and musculoskeletal systems in pre-frail elderly through nonlinear and linear measurements.
Frailty syndrome is described as a clinical state of vulnerability to stress resulting from the decline of resilience and physiological reserves associated with aging. It is also characterized by a reduction of the interaction between systems and that would be reflected by a loss of physiological complexity. Physical exercise, especially the multi-component, is pointed out as a key element in the intervention of frail elderly individuals. However, it is still unclear whether the improvement in functional capacity observed with this type of training would be related to changes in the physiological complexity of these elderly individuals. The aim of this study is to evaluate the effect of multi-component training on the dynamics of the cardiovascular, motor, neuromuscular and physical activity levels of pre-frail elderly. Thirty-six pre-frail elderly individuals will be divided into intervention (IG, n = 18) and control (CG, n = 18) groups at three different moments (pre-intervention, post-intervention, 16 weeks, and follow-up of detraining of 6 Weeks). The complexity will be evaluated by calculating the entropy of the biological signals: a) heart rate, blood pressure (in supine and orthostatic conditions), b) oscillations of the pressure center (in open, closed eyes, after standing in a chair And under dual-task cognitive condition), c) torque oscillations of the knee extensor muscle group.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
40
The intervention program will follow the recommendations of the American College of Sports Medicine (ACSM, 2009), including aerobic, muscle strength, flexibility and balance exercise. The duration of the intervention will be 16 weeks with sessions 60 min performed in three alternate days.
Federal University of São Carlos
São Carlos, São Paulo, Brazil
Linear and nonlinear measurements of postural control
Sample Entropy; Approximate Entropy
Time frame: Change from baseline sample entropy and approximate entropy at 16 weeks of multicomponent training and after 6 weeks of detraining
Linear and nonlinear measurements of cardiovascular system
Heart Rate Variability; Conditional Entropy
Time frame: Change from baseline heart rate variability and conditional entropy at 16 weeks of multicomponent training and after 6 weeks of detraining
Linear and nonlinear measurements of musculoskeletal systems
Knee extensor torque complexity
Time frame: Change from baseline knee extensor torque complexity at 16 weeks of multicomponent training and after 6 weeks of detraining
Cognition Measures
Addenbrooke's Cognitive Examination
Time frame: Change from baseline addenbrooke's cognitive examination at 16 weeks of multicomponent training and after 6 weeks of detraining
Functional Measures
Six-minute Walk Test
Time frame: Change from baseline six-minute walk test at 16 weeks of multicomponent training and after 6 weeks of detraining
Functional Measures
Short Physical Performance Battery
Time frame: Change from baseline short physical performance battery at 16 weeks of multicomponent training and after 6 weeks of detraining
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