Brock Exercise And Supplement Trials

Healthy Clinical Trial

— BEAST  

Official title:

Effects of Greek Yogurt and Exercise on Muscle Size, Body Composition and Bone Health in Untrained, University-aged Males

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03196856
• Other study ID #: REB16-295
• Status: Completed
• Phase: N/A
• Start date: July 1, 2017
• Est. completion date: May 30, 2019

Study information

• Verified date: September 2019
• Source: Brock University
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

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.

Description:

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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 30
• Est. completion date: May 30, 2019
• Est. primary completion date: August 30, 2018
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Male
• Age group: 18 Years to 25 Years

Eligibility

Inclusion Criteria:

• Male

• 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

Related Conditions & MeSH terms

• Healthy
• Untrained

Intervention

Behavioral:
• Resistance and Plyometric Exercise
12 weeks of Resistance (twice weekly) and Plyometric (once weekly) training

Dietary Supplement:
• Greek Yogurt (0% Plain)
200g 3x/day for 12 weeks.
• Placebo - Study Designed Supplement
Iso-energetic to yogurt. 3x/day for 12 weeks.

Locations

Country	Name	City	State
Canada	Brock University	St. Catharines	Ontario

Sponsors (1)

Lead Sponsor	Collaborator
Brock University

Country where clinical trial is conducted

Canada, 

References & Publications (1)

Bridge A, Brown J, Snider H, Nasato M, Ward WE, Roy BD, Josse AR. Greek Yogurt and 12 Weeks of Exercise Training on Strength, Muscle Thickness and Body Composition in Lean, Untrained, University-Aged Males. Front Nutr. 2019 Apr 30;6:55. doi: 10.3389/fnut. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Muscular Strength	1 Repetition Maximum of bench press, seated row, quad extension and hamstring curl	Change from Baseline to 12 weeks
Primary	Muscle Size	Muscle Size determined by ultrasound at various sites.	Change from Baseline to 12 weeks
Primary	Body Composition	Body Fat % measured via BodPod and BodyMetrix	Change from Baseline to 12 weeks
Secondary	Bone cell activity	Bone markers measured in serum.	Change from Baseline to 12 weeks
Secondary	Vertical Jump Height	measured via chalk-on-wall technique	Change from Baseline to 12 weeks

External Links

•   Published Manuscript