在胃肠功能,基质氧化和耐力运动表现的标志物上,具有不同营养密度的重复养挑战
Isabel G Martinez1, Jessica R Biesiekierski1,2, Christopher E Rauch1
1Department of Nutrition, Dietetics and Food, Monash University, Notting Hill, VIC, Australia.
International journal of sport nutrition and exercise metabolism
|February 6, 2025
概括
用脂肪或碳水化合物补充剂重复食挑战并没有显著改变肠道传输时间或基质氧化. 脂肪和碳水化合物养的挑战同样减少了运动期间的胃肠道症状.
科学领域:
- 运动科学 运动科学 运动科学
- 人体生理学 人体生理学
- 胃肠病学 胃肠病学
背景情况:
- 肠道训练可以提高胃肠道的耐受性,葡萄糖的可用性和运动表现.
- 研究替代养策略对于优化耐力运动员营养至关重要.
研究的目的:
- 为了比较7天重复的脂肪与碳水化合物养挑战对胃肠功能,葡萄糖可用性和运动表现的影响.
- 评估基于脂肪的养挑战是否改善或损害与基于碳水化合物的挑战相比的结果.
主要方法:
- 44名耐力运动员接受了高碳水化合物负载的干预前肠道挑战 (T1).
- 参与者被随机分配到7天的脂肪养挑战 (FFC) 或碳水化合物养挑战 (CFC) 组.
- 干预后的肠道挑战 (T2) 评估了胃肠道症状,传输时间,基质氧化和性能.
主要成果:
- 没有观察到FFC和CFC之间在休息时的口腔过渡时间,食耐受性或基质氧化方面存在显著差异.
- 这两组从T1到T2显示出总体和上部胃肠道症状严重程度的类似减少.
- 峰值呼吸在FFC组的T2处较低,这表明潜在的改变了肠道发酵.
结论:
- 与碳水化合物反复养挑战相比,使用脂肪的反复养挑战不会改善或恶化胃肠道和燃料的结果.
- 脂肪和碳水化合物养策略似乎有效地减少运动引起的胃肠道疾病.
- 进一步的研究可能会探索特定的脂肪成分及其对耐力表现的影响.
相关概念视频
01:27Exercise and Muscle Performance
1.3K
Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
1.3K
01:24Muscle Recovery and Fatigue
1.9K
Muscle fatigue refers to the decline in a muscle's ability to maintain the force of contraction after prolonged activity. It primarily stems from changes within muscle fibers. Even before experiencing muscle fatigue, one may feel tired and have the urge to stop the activity. This response, known as central fatigue, occurs due to changes in the central nervous system, namely the brain and spinal cord. While there is no single mechanism that induces fatigue, it may serve as a protective...
1.9K