The Effect of Ketogenic and Carbohydrate, Low-Glycemic Index Diet on Physical and Specific Performance Capacity, and Exercise Metabolism in Crossfit- Trained Athletes
试验速览
- 阶段
- 不适用
- 状态
- 进行中（未招募）
- 发起方
- 入组人数
- 70
- 试验地点
- 2
- 主要终点
- Changes in energy substrates utilization following dietary intervention
研究概览
简要总结
The purpose of the presented study was to assess the influence of Ketogenic (KD) and a carbohydrate diet with a low glycemic index (CHO-LGI) of a 4-week diet on physical and specific performance capacity, exercise metabolism, as well as concentrations of the selected biochemical blood markers in Crossfit- trained athletes, in a randomised and parallel trial.
详细描述
The impact of various dietary strategies, including the alternative ketogenic diet - recently popular among strength athletes, has not been unequivocally assessed in the high-intensity sport disciplines that Crossfit belongs to. There is also a lack of data in these disciplines about the potential longer adaptation of athletes to the very low carbohydrate intake resulting from the ketogenic diet and its impact in high-intensity Crossfit training. Therefore, the purpose of this study was the assessment of the influence of a 4-week KD and a CHO-LGI diet on physical and specific performance capacity, exercise metabolism, as well as concentrations of the selected biochemical blood markers in Crossfit- trained athletes, in a randomised and parallel trial.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 40 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •written consent to participate,
- •a current medical clearance to practice sports,
- •training experience: at least 2 years,
- •minimum of 4 workout sessions (Crossfit) a week.
排除标准
- •current injury,
- •any health-related contraindication,
- •declared general feeling of being unwell,
- •unwilling to follow the study protocol,
- •smoking, illicit drug use, alcohol consumption greater than 1-2 drinks/week, dietary supplements use less than 3 weeks before the study,
- •females- being pregnant or planning to become pregnant during the study.
结局指标
主要结局
Changes in energy substrates utilization following dietary intervention
时间窗: Baseline and after 4 weeks
Fats (g/min) and carbohydrates (g/min) oxidation analysis
Changes in aerobic capacity following dietary intervention
时间窗: Baseline and after 4 weeks
Changes in CrossFit-specific performance capacity (Fight Gone Bad test) following dietary intervention
时间窗: Baseline and after 4 weeks
The number of correctly performed repetitions of exercises (reps)
次要结局
- Changes in blood glucose and hemoglobin concentration following dietary intervention(Baseline and after 4 weeks)
- Changes of testosterone, cortisol, urea, lactate and pyruvate concentration in blood following dietary intervention(Baseline and after 4 weeks)
- Changes in fat mass and fat free mass following dietary intervention(Baseline and after 4 weeks)
- Changes of red and white blood cell concentration in blood following dietary intervention(Baseline and after 4 weeks)
- Changes in blood hematocrit levels following dietary intervention(Baseline and after 4 weeks)
- Changes of creatine kinase, lactate dehydrogenase, alanine aminotransferase and aspartate aminotransferase activity in blood after following dietary intervention(Baseline and after 4 weeks)
研究者
Krzysztof Durkalec-Michalski
Associate Professor
Poznan University of Physical Education