The Effect of Sleep Deprivation and Moderate Intermittent Exercise on Maximal Aerobic Capacity.
NAVAL HEALTH RESEARCH CENTER SAN DIEGO CA
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The purpose of this study was to determine the effects of moderate intermittent work IW, partial sleep deprivation PSD and 8 hrs. of recovery sleep RS on maximal oxygen uptake VO2max. The IW consisted of two 20 hr. periods separated by a 3 hr. nap. Thirty male subjects with the following mean characteristics age 21.2 yrs., height 176.6 cm., and weight 74.9 kg. were randomly assigned to a non-exercising group C, or an exercising group E. Subjects were further randomly assigned to Noon N or Midnight M start times. Comparisons of low L and high H fitness levels based on baseline VO2max were also made. All groups underwent PSD with E walking on a treadmill at 30 of VO2max for 30 minshr. VO2-max, maximum heart rate HRmax and maximal treadmill walk times WT were measured three times baseline T1, after IW T2 and after RS T3. The L and H means for VO2max were 45.7 and 54.3 mlkgmin, respectively, while all other group means were within 2 mlkgmin of 50 mlkgmin, STPD. Following PSD VO2max dropped 3.5 in C and increased 2.5 in E P 0.05. The HRmax means were within 5 btsmin of 197min for all groups, and the means WTs were between 12.0 and 12.8 mins. with only the H and M groups demonstrating with means of 13.4 and 13.3 mins., respectively. The changes in C and E following PSD support the hypothesis that moderate IW counteracts PSD C and E following PSD induced decrements in VO2max. Neither fitness level nor start time altered the effects of PSD on VO2max. Keywords Physical fitness.
- Anatomy and Physiology
- Stress Physiology