<Originals>Administration of Royal Jelly Protein during a Period of Exercise Training Produces an Additive Effect on Endurance Performance in Young Male Rats

概要

論文の詳細を見る
To examine the effects of the administration of Royal Jelly Protein (RJP) on runtime to exhaustion and muscle oxidative enzyme activity, 30 male rats (aged 6 weeks) were divided into control (CON), RJP administration (30% RJP/casein protein) (RP), treadmill exercise (30m/minute, 60 minutes/day) (EX), and RP+EX groups. After an experimental period of 10 weeks, we tested whether RJP administration would improve run-time to exhaustion in trained rats (EX and RP+EX groups) on the day before the dissection. The running time and distance to exhaustion were significantly higher in the RP+EX group than in the EX group (p<0.05). Immediately after exhaustive exercise, the blood lactic acid concentration was significantly lower in the RP+EX group than in the EX group (p<0.05). Citrate synthase activity in the soleus muscles was significantly higher in the RP group than in the CON group (P<0.05) and significantly higher in the RP+EX group than in the EX group (p<0.05). A significant correlation between CS activity in the soleus muscle and running time to exhaustion was observed in the RP+EX group (r=0.88, p<0.01), but not in the EX group. These results may suggest that RJP administration in exercise-trained rats increases the muscle oxidative capacity and promotes improvement in endurance exercise performance.