Author(s): Murphy MH, Hardman AE
This study compared the effects of short and long bouts of brisk walking in sedentary women. Forty seven women aged 44.4 +/- 6.2 yr (mean +/- SD) were randomly assigned to either three 10-min walks per day (short bouts), one 30-min walk per day (long bouts) or no training (control). Brisk walking was done on 5 d x wk(-1), at 70 to 80% of maximal heart rate, typically at speeds between 1.6 and 1.8 m x s(-1) (3.5 and 4.0 mph), for 10 wk. Subjects agreed not to make changes to their diet. Twelve short-bout walkers, 12 long-bout walkers, and 10 controls completed the study. Relative to controls, VO2max (short-bout, +2.3 +/- 0.1 mL x kg(-1) x min(-1); long-bout, +2.4 +/- 0.1 mL x kg(-1) x min(-1); controls, -0.5 +/- 0.1 mL x kg(-1) x min[-1]) and the VO2 at a blood lactate concentration of 2 mmol x L(-1) increased in walkers (both P < 0.05), with no difference in response between walking groups. Neither heart rate during standard, submaximal exercise nor resting systolic blood pressure changed in a different way in walkers and controls. The sum of four skinfold thicknesses decreased in both walking groups (P < 0.05) but body mass (short-bout, -1.7 +/- 1.7 kg; long-bout, -0.9 +/- 2.0 kg; controls, +0.6 +/- 0.7 kg) and waist circumference decreased significantly only in short-bout walkers. Changes in anthropometric variables did not differ between short- and long-bout walkers. Thus short bouts of brisk walking resulted in similar improvements in fitness and were at least as effective in decreasing body fatness as long bouts of the same total duration.
Referred From: https://www.ncbi.nlm.nih.gov/pubmed/9475657
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Author(s): Lee YC
Author(s): Rosenbaum S, Vancampfort D, Steel Z, Newby J, Ward PB, et al.
Author(s): Center for Behavioral Health Statistics and Quality (2015). Behavioral health trends in the United States: Results from the 2014 National Survey on Drug Use and Health
Author(s): Ross CE, Hayes D
Author(s): Stephens T
Author(s): Galper DI, Trivedi MH, Barlow CE, Dunn AL, Kampert JB
Author(s): Lawlor DA, Hopker SW
Author(s): Ann HRM, Collins KA, Fitterling HL
Author(s): Hare BS, Raglin JS
Author(s): Breus MJ, O’Connor PJ
Author(s): Berra K, Rippe J, Manson JE
Author(s): McKenna J, Naylor PJ, McDowell N
Author(s): Daley A
Author(s): Thompson PD, Funk EJ, Carleton RA
Author(s): Siscovick DS, Weiss NS, Fletcher RH
Author(s): Thompson PD, Franklin BA, Balady GJ, Blair SN, Corrado D, et al.
Author(s): Duvivier BMFM, Schaper NC, Bremers MA, Crombrugge G, Menheere PPCA, et al.
Author(s): DeBusk RF, Stenestrand U, Sheehan M, Haskell WL
Author(s): Jakicic JM, Wing RR, Butler BA
Author(s): Osterberg L, Blaschke T
Author(s): Frank E, Breyan J, Elon L
Author(s): Hillsdon M, Thorogood M, White I, Foster C