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Vol. 83, Issue 6, 2055-2063, December 1997
1 Department of Kinesiology,
Received 13 March 1997; accepted in final form 30 July 1997.
Vandenberghe, K., M. Goris, P. Van Hecke, M. Van Leemputte,
L. Vangerven, and P. Hespel. Long-term creatine intake is
beneficial to muscle performance during resistance training. J. Appl. Physiol. 83(6):
2055-2063, 1997.
phosphorus-31-nuclear magnetic resonance; ergogenics; diet; intermittent exercise
The effects of oral creatine supplementation on
muscle phosphocreatine (PCr) concentration, muscle strength, and body
composition were investigated in young female volunteers
(n = 19) during 10 wk of
resistance training (3 h/wk). Compared with placebo, 4 days of
high-dose creatine intake (20 g/day) increased
(P < 0.05) muscle PCr concentration by 6%. Thereafter, this increase was maintained during 10 wk of training associated with low-dose creatine intake (5 g/day).
Compared with placebo, maximal strength of the muscle groups trained,
maximal intermittent exercise capacity of the arm flexors, and fat-free mass were increased 20-25, 10-25, and 60% more
(P < 0.05), respectively, during
creatine supplementation. Muscle PCr and strength, intermittent exercise capacity, and fat-free mass subsequently remained at a higher
level in the creatine group than in the placebo group during 10 wk of
detraining while low-dose creatine was continued. Finally, on cessation
of creatine intake, muscle PCr in the creatine group returned to normal
within 4 wk. It is concluded that long-term creatine supplementation
enhances the progress of muscle strength during resistance training in
sedentary females.
0161-7567/97 $5.00
Copyright © 1997 the American Physiological Society
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