Four Weeks of 16/8 Time Restrictive Feeding in Endurance Trained Male Runners Decreases Fat Mass, without Affecting Exercise Performance

Nutrients

Gretchen A. Casazza¹  Ashley P. Tovar²  Christine E. Richardson²  Marta D. Van Loan²  Nancy L. Keim²  Brian A. Davis³ 

[1] Department of Kinesiology, Sacramento State University, Sacramento, CA 95819, USA;Department of Nutrition, University of California, Davis, CA 95616, USA;Physical Medicine and Rehabilitation, University of California Davis Medical Center, Sacramento, CA 95816, USA;

关键词: time restricted feeding;    runners;    sport performance;    16/8 diet;    intermittent fasting;   

DOI  :  10.3390/nu13092941

来源: DOAJ

【 摘 要 】

Background: Time restricted Feeding (TRF) is a dietary pattern utilized by endurance athletes, but there is insufficient data regarding its effects on performance and metabolism in this population. The purpose of this investigation was to examine the effects of a 16/8 TRF dietary pattern on exercise performance in trained male endurance runners. Methods: A 4-week randomized crossover intervention was used to compare an 8-h TRF to a 12-h normal diet (ND) feeding window. Exercise training and dietary intake were similar across interventions. Runners completed a dual-energy X-ray absorptiometry (DXA) scan to assess body composition, a graded treadmill running test to assess substrate utilization, and ran a 10 km time trial to assess performance. Results: There was a significant decrease in fat mass in the TRF intervention (−0.8 ± 1.3 kg with TRF (p = 0.05), vs. +0.1 ± 4.3 kg with ND), with no significant change in fat-free mass. Exercise carbon dioxide production (VCO₂) and blood lactate concentration were significantly lower with the TRF intervention (p ≤ 0.02). No significant changes were seen in exercise respiratory exchange ratio or 10 km time trial performance (−00:20 ± 3:34 min:s TRF vs. −00:36 ± 2:57 min:s ND). Conclusion: This investigation demonstrated that adherence to a 4-week 16/8 TRF dietary intervention decreased fat mass and maintained fat-free mass, while not affecting running performance, in trained male endurance runners.

【 授权许可】

Unknown