Essentials of Nutrition for Sports

Muscle biopsies were analyzed for glycogen immediately after
exercise, at 1.5 hours, and at 4 hours post exercise.

No differences could be observe

d between carbohydrate-protein

and carbohydrate trials.

Figure 10. Van Hall et al. JAP 88(5) 1631. 2000. Leg muscle glycogen concentration and muscle glycogen resynthesis rate during recovery from intense exercise. Muscle glycogen content (A

) and muscle glycogen resynthesis rate (

B) in vastus lateralis muscle

during 4 h of recovery from intense cycle exercise. Values are means ± SE of 5 subjects. #Significant differences from CHO/protein trial,

P<0.05.

§Significant differences from CHO trial,

P<0.05.

No Effect of Additional

Protein and Amino Acids

Jentjens et al, JAP, 2001

15

Eight cyclists performed two experimental trials.

Figure 11. Jentjens et al. JAP 92(2) 839. Mean muscle glycogen contents and synthesis rates postexercise. No difference was found in the rate of muscle glycogen synthesis between carbohydrate and carbohydrate-protein trials.

Subjects received (a) 1.2 grams carbohydrate per kilogram per

hour and 0.4 grams protein per kilogram or (b) 1.2 grams carbohydrate per kilogram per hour.

Muscle biopsies were obtained immediately, 1 hour and 3 hours

after exercise.

No differences were found in the rate of muscle glycogen

synthesis.

The results of the study are illustrated in

Figure 11

.

(^)
15 Jentjens, RLPG., et al. (2001). Addition of protein and amino acids to carbohydrates does not enhance
postexercise muscle glycogen synthesis. Journal of Applied Physiology. 91(839). http://jap.physiology.org/cgi/reprint/91/2/839?maxtoshow=&HITS=10&hits=10&RESULTFORMAT=&author1=jentjens&andorex
actfulltext=and&searchid=110134597
2822_9517&stored_search=&FIRSTIN
DEX=0&sortspec=relevance&resourcet
ype=1. Accessed 11-25-2004.
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