Effects of Greek Yogurt and Exercise on Muscle Size, Body Composition and Bone Health in Untrained, University-aged Males
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 30
- 试验地点
- 2
- 主要终点
- Muscle Size
研究概览
简要总结
This study will analyze the effects of Greek yogurt consumption and an 12 week exercise intervention on muscle size, body composition and bone health in untrained, university-aged males.
详细描述
Introduction
Previous research has shown the effectiveness of dairy milk and whey protein on increasing muscle size, optimizing body composition and increasing strength in adult males. However, evidence on the use of high protein/Greek yogurt on muscle size, body composition and bone health is limited in this population. Yogurt contains similar muscle and bone supporting nutrients as milk, yet it offers a host of additional benefits including; increased satiety, probiotic cultures, greater stability, increased variety, more affordable and versatile features such as acting as a vehicle for consumption of other healthful foods. The proposed research will investigate the use of Greek yogurt as an effective post-exercise food to promote healthy body composition and bone health changes in young adult males.
Design: Parallel, randomized controlled trial.
Participants: 30 (n=15 YOG, n=15 PLA) healthy, untrained university-aged males.
Methods: Subjects will undergo a 12-week resistance and plyometric training program (exercising 3 days/week). The YOG group will consume a 200g dose (pro= 20g, carbs= 8 grams, ~110 kcals) of plain 0% Greek yogurt, while the PLA group will consume an isoenergetic, protein-void beverage comprised mainly of maltodextrin (pro= 0g, carbs= 26g, ~110 kcals). Each group will consume 3 doses per day (immediately and 1 hour post-exercise, and bedtime). Markers of bone health (CTx and P1NP) will be taken at baseline, 1 week and 12 weeks to determine acute and total changes. Muscle size, body composition, strength, vertical jump height and nutritional diaries will be measured pre and post intervention and habitual diet maintenance will be encouraged throughout the intervention.
Anticipated Results: It is hypothesized that each group will undergo positive changes in the aforementioned measures, however due to the increase in protein and calcium consumption, the yogurt group is predicted to have significantly greater increases in these variables than the placebo group.
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
盲法说明
Participants will be randomly selected to the yogurt group or a placebo group. Although participants within the yogurt group will be aware that they are consuming yogurt, the placebo group will not be aware of the contents of the placebo supplement.
入排标准
- 年龄范围
- 18 Years 至 25 Years（Adult）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •Age 18-25 years
- •Normal BMI (18.5-24.9) kg/m2
- •Have not participated in a resistance training program (of resistance exercise at least 2x/week or more) in the last 6 months
- •Healthy and not taking any medication affecting muscle or bone
- •Not supplementing with vitamins/ minerals or protein
- •Speak and understand English
- •No dairy allergy or lactose intolerance
排除标准
- 未提供
研究组 & 干预措施
Yogurt Group
Group will be consuming 200g of Greek Yogurt (Plain, 0%) 3 times daily for 12 weeks
干预措施: Resistance and Plyometric Exercise (Behavioral)
Yogurt Group
Group will be consuming 200g of Greek Yogurt (Plain, 0%) 3 times daily for 12 weeks
干预措施: Greek Yogurt (0% Plain) (Dietary Supplement)
Study Designed Supplement Group
Group will consume an isoenergetic, protein void, maltodextrin-based placebo supplement during the same time points for 12 weeks as well. The Placebo contain maltodextrin and pudding powder to mimic the consistency of Greek yogurt.
干预措施: Resistance and Plyometric Exercise (Behavioral)
Study Designed Supplement Group
Group will consume an isoenergetic, protein void, maltodextrin-based placebo supplement during the same time points for 12 weeks as well. The Placebo contain maltodextrin and pudding powder to mimic the consistency of Greek yogurt.
干预措施: Placebo - Study Designed Supplement (Dietary Supplement)
结局指标
主要结局
Muscle Size
时间窗: Change from Baseline to 12 weeks
Muscle Size determined by ultrasound at various sites.
Muscular Strength
时间窗: Change from Baseline to 12 weeks
1 Repetition Maximum of bench press, seated row, quad extension and hamstring curl
Body Composition
时间窗: Change from Baseline to 12 weeks
Body Fat % measured via BodPod and BodyMetrix
次要结局
- Vertical Jump Height(Change from Baseline to 12 weeks)
- Bone cell activity(Change from Baseline to 12 weeks)
研究者
Andrea Josse
Assistant Professor
Brock University