Conclusions The current evidence , from cross-sectional and prospect i ve cohort studies , supports that physical activity of any bout duration is associated with improved health outcomes , which includes all-cause mortality .
Purpose This study aim ed to conduct a systematic literature review to determine whether physical activity episodes of < 10 min in duration have health-related benefits or , alternatively , if the benefits are only realized when the duration of physical activity episodes is ≥10 min .
The effects of 60 minutes of brisk walking per week, accumulated in two different patterns, on cardiovascular risk.
BACKGROUND Current ACSM guidelines recommend that adults should exercise for 20 - 60 min on 3 - 5 days.week(-1 ) ( M.L. Pollock , et al. , The recommended quantity and quality of exercise for developing and maintaining cardiorespiratory and muscular fitness , and flexibility in healthy adults . Medicine and Science in Sports and Exercise , 30 ( 6 ) ( 1998 ) 975 - 991 . ) . For individuals constrained by a busy lifestyle , an exercise prescription that delivers benefits with the minimum investment of time is attractive . The purpose of the present study , therefore , was to examine the effect of instructing sedentary individuals to undertake 20 min of brisk walking , in two different patterns , 3 days per week , on fitness and other cardiovascular disease ( CVD ) risk factors . METHODS Forty-eight subjects ( 31 women ) mean ( + /-SD ) age 45.7 + /- 9.4 year were r and omly assigned to either one 20-min walk ( single bout ) , two 10-min walks ( accumulated bouts ) 3 days week(-1 ) for 12-week , or no training ( control ) . Oxygen consumption ( VO2 ) , heart rate ( HR ) , and ratings of perceived exertion ( RPE ) were measured during a 4-stage treadmill test at pre- and post-intervention . Body composition , resting blood pressure and fasting lipoproteins were also assessed . Thirty-two subjects completed the study . RESULTS There was a significant difference between single-bout and accumulated-bout walkers in the reduction of HR at stages 2 and 3 of the treadmill test from pre- to post-intervention ( P < 0.05 ) . There were no differences between groups for changes in VO2 or RPE from pre- to post-intervention . There were also no changes in body mass , adiposity , blood pressure , waist and hip circumferences , or lipid/lipoproteins . CONCLUSION Brisk walking for 20 min on 3 days of the week fails to alter cardiovascular disease risk factors in previously sedentary adults
Conclusions The current evidence , from cross-sectional and prospect i ve cohort studies , supports that physical activity of any bout duration is associated with improved health outcomes , which includes all-cause mortality .
Purpose This study aim ed to conduct a systematic literature review to determine whether physical activity episodes of < 10 min in duration have health-related benefits or , alternatively , if the benefits are only realized when the duration of physical activity episodes is ≥10 min .