Effect of Carbohydrate Consumption on Fatigue and Muscle Damage in Jiu-Jitsu Athletes: A Randomized Clinical Trial
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 14
- 试验地点
- 2
- 主要终点
- change in upper limbs strength
研究概览
简要总结
The study is a randomized, double-blinded, placebo-controlled trial that will include the participation of 14 Jiu-Jitsu athletes between 18 and 33 years. The aim of the study is to evaluate the effects of carbohydrate consumption on fatigue and exercise-induced muscle damage in Jiu-Jitsu athletes.
详细描述
Brazilian Jiu-Jitsu (BJJ) is a sport characterized by intermittent high-intensity efforts separated by periods of low intensity. Muscular strength is considered one of the most important physical components to be developed, especially in the upper limbs through dynamic and static actions. The activities of high intensity (relation effort-pause) carried out by the upper and lower limbs during BJJ can induce muscle fatigue. In order to minimize the glycogen depletion and to guarantee the availability of energy substrate to the athlete during the physical exercise, the carbohydrate intake before moderate intensity exercises should be between 5-7 g / kg of weight / day. The intervention group will receive a 30g maltodextrin beverage and the placebo group a non-carbohydrate drink. There will be 3 combat simulations of 8 min each, with intervals of 10 min between fights. Athletes will be instructed to remain with their usual intake during the study. The outcomes will be: manual grip strength (dynamometer), upper limb strength (KGST), lower limb strength (vertical jump), subjective exertion perception (Borg scale), pain perception (Nilsson scale), blood markers of muscle damage (CK and LDH), lactate, and glycemia.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Diagnostic
- 盲法
- Triple (Participant, Investigator, Outcomes Assessor)
入排标准
- 年龄范围
- 18 Years 至 33 Years（Adult）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •Compete in the categories of weight between 70kg and 88,3kg (weight classification from light to medium heavy, belonging to the bands purple to brown).
- •Age between 18 and 33 years.
- •Be training at least three times a week, minimum of 1,5 hours per day, for at least 3 consecutive months.
- •Have not used anabolic steroids in the last 6 months during the study period.
- •Do not use any type of dietary supplement in the last 3 months.
- •Self-declared healthy individuals.
排除标准
- •Recent muscle injury (within the last 3 months) that compromises and / or impedes the performance of the exercise requested in the study.
- •Be in a time of rapid weight loss (pre-competition).
研究组 & 干预措施
Carbohydrate
30g of carbohydrate (maltodextrin) diluted in 300ml of water. Athletes will drink 100ml before and 100ml in the first and second interval between exercise.
干预措施: Carbohydrate (maltodextrin) (Dietary Supplement)
Placebo
300 ml of a non-caloric drink. Athletes will drink 100ml before and 100ml in the first and second interval between exercise.
干预措施: Placebo (Other)
结局指标
主要结局
change in upper limbs strength
时间窗: Pre-exercise; at 2 intervals during exercise; 24hour and 48hour after exercise
Kimono Grip Strength Test
次要结局
- change in glucose(Pre-exercise; at 2 intervals during exercise; immediatly post-exercise)
- change in creatine kinase(Pre-exercise; immediatly post-exercise; 24hour and 48hour after exercise)
- change in lactate dehydrogenase(Pre-exercise; immediatly post-exercise; 24hour and 48hour after exercise)
- change in lactate(At 2 intervals during exercise; immediatly post-exercise)
- change in lower limbs power(Pre-exercise; at 2 intervals during exercise; 24hour and 48hour after exercise)
- change in hand grip strength(Pre-exercise; at 2 intervals during exercise; 24hour and 48hour after exercise)
研究者
Cláudia Dornelles Schneider
Professor
Federal University of Health Science of Porto Alegre