Found an old study from 1990 from the American Journal of Clinical Nutrition. This is a perception can be a competitor prepping for a contest where kcalories are controlled and restricted in a sense to induce lipolysis or change body fat composition. There was no difference in body fat mass loss between subjects who exercised at a high 80-90% peak VO2 and the other group who exercised at a lower intensity of 40-50% peak VO2.
Exercise intensity does not affect the composition of diet- and exercise-induced body mass loss
DL Ballor, JP McCarthy and EJ Wilterdink
Department of Physical Education and Dance, University of Wisconsin- Madison 53706.
The effect of caloric restriction (1200 kcal/d intake) in combination with high (High) (80-90% of peak VO2) or low (Low) (40-50% of peak VO2) exercise work rates on the composition of lost body mass was determined in 27 obese women (percent fat, 36.7 +/- 4.2%; mean +/- SD). All subjects trained 3 d/wk for 8 wk, with the High (n = 14) and Low (n = 13) groups exercising for 25 and 50 min/d, respectively. After posttesting there were no differences between the groups with respect to pre- to posttest changes (mean of combined groups) in body mass (- 7%), fat-free mass (-10%), fat mass (-16%), percent fat (-10%), and sum of five skinfold-thickness measurements (-16%). This study suggests that with regard to conservation of fat-free mass, the selection of an exercise intensity for a diet and exercise regimen may be left to the preference of the clinician and/or dieter.
American Journal of Clinical Nutrition, Vol 51, 142-146, Copyright © 1990 by The American Society for Clinical Nutrition, Inc