Carbohydrate-Protein Drink Improves Time to Exhaustion after Recovery from Endurance Exercise
ERIC S. NILES, TONY LACHOWETZ, JOHN GARFI, WILLIAM SULLIVAN, JOHN C. SMITH, BRIAN P. LEYH, AND SAMUEL A. HEADLEY. Allied Health Sciences Center, Springfield College, Springfield, MA
Ten endurance trained males were studied to investigate the ergogenic effects of isocaloric carbohydrate (CHO, 152.7 g) and carbohydrate-protein (CHO-PRO, 112 g CHO with 40.7 g PRO) drinks ingested after a glycogen lowering diet and exercise bout.
Treatments were administered in a double-blind and counterbalanced fashion. After a glycogen lowering diet and run, two dosages of a drink were administered with a 60 min interval between dosages. The CHO-PRO trial resulted in higher serum insulin levels (60.84 vs 30.1 mU/ml) 90 min into recovery than the CHO only trail (p<0.05). Furthermore, the time to run to exhaustion was longer during the CHO-PRO trial (540.7±91.56 sec) than the CHO only trial (446.1±97.09 sec, p<0.05).
In conclusion, a CHO-PRO drink following glycogen depleting exercise may facilitate a greater rate of muscle glycogen resynthesis than a CHO only beverage, hasten the recovery process, and improve exercise endurance during a second bout of exercise performed on the same day.
The entire article can be found in Volume 4 Number 1 January 2001 of the Journal of Exercise Physiology - online