Effects of a Very Low Carbohydrate Ketogenic Diet on Body Composition, Muscle Strength, Muscle Area, Metabolism and Performance in Semi-professional Soccer Players
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 16
- 试验地点
- 2
- 主要终点
- Fat body mass
研究概览
简要总结
A ketogenic diet (KD) is a nutritional approach, usually adopted for weight loss, that restricts daily carbohydrates under 30 g/day. KD showed contradictory results on sport performance, whilst no data are available on team sports. The investigators will investigate the influence of a KD on different parameters in soccer players
详细描述
Sixteen semi-professional soccer players will be randomly assigned to a ketogenic diet (KD n=8) or to a western diet (WD n=8). Diets contain the same amount of protein (1.8g/Kg body weight/day). Body weight and body composition will be measured by dual energy x-ray absorptiometry (DXA) and bioelectrical impedance analysis (BIA). Resting energy expenditure (REE), respiratory exchange ratio (RER), cross sectional area (CSA) and isometric muscle strength of quadriceps, counter movement jump (CMJ) and yoyo intermittent recovery test will be measured.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Basic Science
- 盲法
- Double (Investigator, Outcomes Assessor)
盲法说明
Treatment and control were masked with A and B
入排标准
- 年龄范围
- 18 Years 至 30 Years（Adult）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •semiprofessional soccer players
排除标准
- •body fat percentage over 32%, (determined via dual energy X-ray absorptiometry DEXA),
- •cardiovascular,
- •respiratory, gastrointestinal,
- •thyroid or any other metabolic diseases,
- •weight change more than 2 Kg over the last month,
- •adherence to special diets,
- •use of nutritional supplements (except a daily multivitamin-mineral)
- •use of medication to control blood lipids or glucose and goal-keepers.
研究组 & 干预措施
Ketogenic diet
Ketogenic diet: less than 30 g/day of carbohydrate. Subjects can eat beef, veal, poultry, fish, raw and cooked vegetables without restriction, cold cuts such as dried beef, eggs and seasoned cheese (parmesan), ketogenic pasta (selected with a ketogenic ratio of 4:1), fruits with the lowest glycemic index (blueberry, raspberry), raw nuts and seeds, ghee butter, plant oils and fats from avocado, coconut and olives
干预措施: ketogenic diet (Other)
Western diet
The western diet (WD) is composed mainly of whole cereals (spelt, rye, oat) and pseudo-cereals (buckwheat, quinoa, amaranth), whole grain pasta, potatoes, meet, fish, vegetables, fruit, legumes, olive oil, milk and red wine (at most 1 glass per day). It ensure a constant energy and macronutrient balance: protein 1.8g x Kg-1 x body weight-1 x day-1, (30%), fats 20-25% and carbohydrate 50-55%.
干预措施: Western diet (Other)
结局指标
主要结局
Fat body mass
时间窗: 4 weeks
Body composition with DEXA: we measure body fat mass in grams.
lean body mass
时间窗: 4 weeks
Body composition with DEXA: we measure lean body mass in grams.
Visceral Adipose tissue (VAT)
时间窗: 4 weeks
Body composition with DEXA: VAT in grams
Total body water
时间窗: 4 weeks
We will use a BIA to calculate totally body water and intracellular and extracellular water in liters
次要结局
- resting energy expenditure (REE)(4 weeks)
- respiratory ratio (RR)(4 weeks)
- specific performance(4 weeks)
- lower limb power(4 weeks)
- quadriceps muscle area(4 weeks)
- quadriceps muscle thickness(4 weeks)
- quadriceps strength(4 weeks)
- quadriceps strength per area(4 weeks)
研究者
Antonio Paoli
Professor
University of Padova