Effects of Resistance Training With Milk Supplementation on Body Composition in Middle School Children
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 150
- 试验地点
- 2
- 主要终点
- Body Composition
研究概览
简要总结
The investigators primary objective is to evaluate the effect of a 6 month (3 days/wk) supervised, progressive RT program with increased daily milk intake in untrained adolescents on measures of body composition and cardiovascular risk factors. The investigators hypothesize that milk supplementation will produce significantly greater favorable changes in all body composition measures compared with RT + carbohydrate and control.
详细描述
We will recruit 150 healthy, adolescent middle school boys and girls (grades 7 through 9), BMI > 50th percentile < 98th percentile, who will participate in 6 months of supervised resistance training (3 days/wk) and will be randomized to one of 3 groups: RT + milk, RT + isocaloric carbohydrate, RT only (control). Both physical activity and diet outside the study protocol will be carefully monitored. Measurements will be completed at baseline 3 months and upon completion of the training protocol at 6 months.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Prevention
- 盲法
- None
入排标准
- 年龄范围
- 12 Years 至 14 Years（Child）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Middle school student (Grades 7-9)
- •BMI > 50th percentile - < 98th percentile
- •No resistance training in the past 6 months.
- •Endurance training (running, cycling, swimming, walking for exercise etc) not more than 3 hr per week, as assessed by screening questionnaire.
- •Weight stable (+/- 4.5kg) for 3 months prior to intake.
- •Willing to be randomized to one of the 3 study groups.
- •Exclusion criteria:
- •Individuals with contraindications based on review of health history by the investigators, including blood pressure, lipid profile, glucose, and insulin, and abnormal values obtained in a 24 item blood panel, such as electrolytes, liver function, etc. These individuals will be referred to their primary care physician for further evaluation and to obtain permission to participate. The following cut-points will be used for cardiovascular and metabolic parameters: dyslipidemia- lipids (cholesterol > 240 mg/L; triglycerides >500 mg/L), hypertension- systolic blood pressure > 140 mmHG or diastolic blood pressure > 90 mmHG, diabetes - fasting glucose from venous plasma fasting glucose > 126 mg/dL.
- •Medications that could affect metabolism such as cardiac drugs, thyroid, steroids, insulin, beta blockers, SSRI's, birth control pills, etc.
- •Current use of smoking/tobacco products or initiation of smoking/tobacco during the study.
- •Eating disorders as determined by screening questionnaire
- •Adherence to specialized diet regimes, vegetarian, macrobiotic, etc.
- •Food allergies, particularly lactose intolerance.
- •Treatment for psychiatric illness of chemical dependency within the previous 6 months.
- •Pregnancy or lactation.
- •Dietary intake of ≤800 mg calcium and ≤1 servings of milk per day as assessed from 3 -24 hr diet recalls (2 week-days, 1 week-end day) conducted at baseline.
排除标准
- 未提供
结局指标
主要结局
Body Composition
时间窗: 6 months
Changes in body composition will be evaluated by measuring the change in percent body fat, total fat mass, and total lean mass by DEXA
次要结局
- Blood lipids, glucose, and insulin(6 months)