Vitamin D, Strength, and Bone Density in Collegiate Athletes
试验速览
- 阶段
- 早期 1 期
- 状态
- 已完成
- 入组人数
- 68
- 试验地点
- 1
- 主要终点
- Strength
研究概览
简要总结
The goal of this study is to determine whether Vitamin D supplementation improves strength and bone density, and reduces the risk of injury in collegiate athletes.
详细描述
Vitamin D is a hormone that is important for bone and muscle health. As such, not having enough vitamin D in your body is associated with increased risk of injury and reduced health and athletic performance. It is often recommended that individuals who have low levels of vitamin D take vitamin D supplements. However, the effects of vitamin D supplementation on health and strength gains in collegiate athletes are not known. The goal of this study is to determine whether vitamin D supplementation increases strength and bone density, while reducing the risk of injury in collegiate athletes. Fasting vitamin D concentrations will be measured and athletes will be supplemented daily with Vitamin D for 8-12 weeks. The amount of supplementation will depend on whether the athlete is categorized as sufficient (>30ng/ml), insufficient (20-35ng/ml), or deficient (<20ng/ml). Vitamin D concentrations, strength, bone density, and injury risk will be assessed before and after the intervention period.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Parallel
- 主要目的
- Prevention
- 盲法
- Triple (Participant, Investigator, Outcomes Assessor)
盲法说明
Any individuals involved in study measures will also be masked.
入排标准
- 年龄范围
- 18 Years 至 30 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •athlete for a sanctioned Virginia Tech sport
排除标准
- •pregnant or trying to become pregnant, currently taking vitamin D (>600IU/day), calcium (>1000mg/dl), taking any performance enhancing supplements (example, creatine), or any other medication or nutritional supplements that might influence the study variables, cardiac or thyroid problems, have diabetes, or epilepsy
研究组 & 干预措施
Vitamin D - 10000IU
These individuals have been categorized as Vitamin D deficient and will receive 10000IU of Vitamin D per day.
干预措施: Vitamin D 10000 UNT (Drug)
Vitamin D - 5000IU
These individuals have been categorized as Vitamin D insufficient and will receive 5000IU of Vitamin D per day.
干预措施: Vitamin D 5000 UNT (Drug)
结局指标
主要结局
Strength
时间窗: Up to 12 weeks
Overall strength assessed via maximal strength testing. The specific tests may include the following, 1) one repetition max bench press (lbs) -, 2) one repetition max squat (lbs), 3) vertical jump test (feet), 4) broad jump test (feet), 5) dead lifts (lbs and repetition), 6) pull ups (repetition), 7) dips (repetition), and 8) shuttle time (test involving repeated sprints to and from marked points or lines - minutes/ seconds).
次要结局
- Injury Occurence(Every week for up to 12 weeks)
- Femur Bone Density(Up to 12 weeks)
- Spine Bone Density(Up to 12 weeks)