Exercise capacity and XXXX loss during a high or low @entity1735 diet.

@entity1 @entity1568 @entity308 @entity28 @entity4962 @entity1735 @entity4322 @entity165 @entity414
Twelve @entity28 @entity1 completed a maximal and an endurance exercise test (70% peak VO2) during a weight maintenance week. For the next 4 wk, the @entity1 consumed either a high (71%) @entity1735 (HC) or a low (33%) @entity1735 (LC), isonitrogenous very-low-calorie diet (VLCD) of 2,219 kJ (530 kcal).d-1. A supervised exercise session at 60% peak VO2 took place 3 times.wk-1 for 30 to 45 min. Peak VO2 and exercise endurance tests were repeated during the fourth week of the VLCD. One week of a 4,186 kJ (1000 kcal) diet followed the VLCD. The average weekly weight loss was 1.7 +/- 0.1 kg for the HC group and 2.0 +/- 0.2 kg for the LC group. Urinary @entity1568 loss was greater for the LC group early in the VLCD but not different than HC over the entire experimental period. Serum @entity165 and high-density lipoprotein- @entity165 decreased in both groups but the ratio of these lipids improved over the treatment. Serum @entity4322 and @entity414 increased significantly more for the LC than the HC group. Although absolute peak VO2 decreased, @entity4962 relative to body weight was maintained. Time to exhaustion improved by 36% for both groups in the endurance exercise tests. The endurance exercise R ratio was significantly more @entity308 by the LC than the HC treatment. In summary, both supervised treatments were effective in causing substantial weight reduction and improved blood lipid profiles in healthy young @entity1 but caused a net loss of body protein. Neither treatment compromised ability to participate in a thrice weekly exercise program. Although peak aerobic capacity did not increase, aerobic endurance at a fixed sub-maximal exercise load was improved.
