Limits...
The effects of single long and accumulated short bouts of exercise on cardiovascular risks in male Japanese workers: a randomized controlled study.

Eguchi M, Ohta M, Yamato H - Ind Health (2013)

Bottom Line: In the Long-bout group, waist circumference and maximum oxygen uptake (VO2max) significantly improved after 20 wk.The Short-bouts group demonstrated significant increases in VO2max after 10 weeks and in HDL-C after 20 wk.Plasma TBARS significantly decreased after 20 weeks in the Long-bout group and tended to decrease (but not significantly) in the Short-bouts group.

View Article: PubMed Central - PubMed

Affiliation: Department of Health Development, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan.

ABSTRACT
The aim of this study was to determine whether accumulated short bouts of exercise can achieve the same cardiovascular benefits as a single long bout of exercise in sedentary male Japanese workers and to compare the programs' relative effects on oxidative stress. Twenty-three sedentary male workers were randomly assigned into 2 different exercise programs: a Long-bout group, which performed a single period of continuous exercise (Long-bout group: 30 min × 1) 3 d per week, and a Short-bouts group, which performed 3 short bouts of exercise (Short-bouts group: 10 min × 3) 3 d per week. Cardiovascular risk factors, including the plasma thiobarbituric acid-reactive substances (TBARS) level, were examined at baseline and after both 10 and 20 wk. In the Long-bout group, waist circumference and maximum oxygen uptake (VO2max) significantly improved after 20 wk. The Short-bouts group demonstrated significant increases in VO2max after 10 weeks and in HDL-C after 20 wk. Plasma TBARS significantly decreased after 20 weeks in the Long-bout group and tended to decrease (but not significantly) in the Short-bouts group. These results indicate that accumulated short bouts of exercise are an effective option, especially for busy workers, for incorporating exercise into one's lifestyle.

Show MeSH

Related in: MedlinePlus

Flowchart for participants.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4202748&req=5

fig_001: Flowchart for participants.

Mentions: This was a non-blinded randomized controlled study. Twenty-three sedentary male Japaneseworkers with a mean ( ± SD) age of 43.9 ± 11.6 years were recruited through the universitynewsletter. The inclusion criteria specified men who did not participate in any vigorousphysical activity (reported exercising <20 min·d−1 on <3d·wk−1 for the previous 6 months). We also included workers who had somecardiovascular risk factors (e.g., obesity, mild hypertension, controlled diabetes, anddyslipidemia) but not a history of cardiovascular disease or of musculoskeletal problemspreventing the use of a cycle ergometer. All subjects had sedentary jobs. Medicationlevels were not modified during the study period. Workers were randomly assigned usingrandom numbers generated by a personal computer to one of the following exercise programs:the Long-bout group, which performed a single period of continuous exercise for 30 min on3 days per week, or the Short-bouts group, which performed 3 short bouts of exercise,10 min each, on 3 days per week. A flowchart depicting the participant selection is shownin Fig. 1Fig. 1.


The effects of single long and accumulated short bouts of exercise on cardiovascular risks in male Japanese workers: a randomized controlled study.

Eguchi M, Ohta M, Yamato H - Ind Health (2013)

Flowchart for participants.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4202748&req=5

fig_001: Flowchart for participants.
Mentions: This was a non-blinded randomized controlled study. Twenty-three sedentary male Japaneseworkers with a mean ( ± SD) age of 43.9 ± 11.6 years were recruited through the universitynewsletter. The inclusion criteria specified men who did not participate in any vigorousphysical activity (reported exercising <20 min·d−1 on <3d·wk−1 for the previous 6 months). We also included workers who had somecardiovascular risk factors (e.g., obesity, mild hypertension, controlled diabetes, anddyslipidemia) but not a history of cardiovascular disease or of musculoskeletal problemspreventing the use of a cycle ergometer. All subjects had sedentary jobs. Medicationlevels were not modified during the study period. Workers were randomly assigned usingrandom numbers generated by a personal computer to one of the following exercise programs:the Long-bout group, which performed a single period of continuous exercise for 30 min on3 days per week, or the Short-bouts group, which performed 3 short bouts of exercise,10 min each, on 3 days per week. A flowchart depicting the participant selection is shownin Fig. 1Fig. 1.

Bottom Line: In the Long-bout group, waist circumference and maximum oxygen uptake (VO2max) significantly improved after 20 wk.The Short-bouts group demonstrated significant increases in VO2max after 10 weeks and in HDL-C after 20 wk.Plasma TBARS significantly decreased after 20 weeks in the Long-bout group and tended to decrease (but not significantly) in the Short-bouts group.

View Article: PubMed Central - PubMed

Affiliation: Department of Health Development, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan.

ABSTRACT
The aim of this study was to determine whether accumulated short bouts of exercise can achieve the same cardiovascular benefits as a single long bout of exercise in sedentary male Japanese workers and to compare the programs' relative effects on oxidative stress. Twenty-three sedentary male workers were randomly assigned into 2 different exercise programs: a Long-bout group, which performed a single period of continuous exercise (Long-bout group: 30 min × 1) 3 d per week, and a Short-bouts group, which performed 3 short bouts of exercise (Short-bouts group: 10 min × 3) 3 d per week. Cardiovascular risk factors, including the plasma thiobarbituric acid-reactive substances (TBARS) level, were examined at baseline and after both 10 and 20 wk. In the Long-bout group, waist circumference and maximum oxygen uptake (VO2max) significantly improved after 20 wk. The Short-bouts group demonstrated significant increases in VO2max after 10 weeks and in HDL-C after 20 wk. Plasma TBARS significantly decreased after 20 weeks in the Long-bout group and tended to decrease (but not significantly) in the Short-bouts group. These results indicate that accumulated short bouts of exercise are an effective option, especially for busy workers, for incorporating exercise into one's lifestyle.

Show MeSH
Related in: MedlinePlus