Int J Sports Med 1991; 12(2): 167-172
DOI: 10.1055/s-2007-1024662
Physiology and Biochemistry

© Georg Thieme Verlag Stuttgart · New York

Effect of Caloric Deficit and Dietary Manipulation on Aerobic and Anaerobic Exercise

R. G. McMurray, C. R. Proctor, W. L. Wilson
  • Exercise Physiology Laboratory, Department of Physical Education, University of North Carolina, Chapel Hill, North Carolina, USA
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Publication History

Publication Date:
14 March 2008 (online)


Twelve competitive wrestlers restricted their caloric intake (92 kJ/kg FFW/day) for 7 days, using a high (HC) or normal (NC) carbohydrate diet to determine the acute effect of caloric deficiency on aerobic and anaerobic exercise performance as well as growth hormone (hGH) and insulin-like growth factor 1 (IGF-1) levels. The subjects were tested while on a eucaloric diet and at the end of the dietary restriction. Neither the dietary restriction nor composition had an effect on the ability to complete an 8-minute run at 85% of maximal capacity, but both produced an increased fat utilization during the run. The responses to the Wingate Anaerobic Test indicated that the NC group had a significant reduction in total and mean power output (-7% & -6%, respectively; p < 0.05), whereas the HC group maintained all power measures. The caloric restriction, regardless of dietary composition, increased the exercise hGH response more for the NC group than the HC group (p < 0.05). IGF-1 levels were significantly lowered by the diet, but the diet composition had no effect. These results indicate that even during caloric restriction, a high carbohydrate diet better maintains anerobic exercise performance. Furthermore, the composition of the diet appears to have no effect on the resting hGH and IGF-1 responses to caloric deficits. However, carbohydrate composition may have an effect on the gGH response to exercise.