Brock Exercise And Supplement Trials

NCT ID: NCT03196856

Last Updated: 2019-09-17

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

30 participants

Study Classification

INTERVENTIONAL

Study Start Date

2017-07-01

Study Completion Date

2019-05-30

Brief Summary

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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.

Detailed Description

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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.

Conditions

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Untrained Healthy

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Randomized Controlled Trial
Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

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.

Study Groups

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Yogurt Group

Group will be consuming 200g of Greek Yogurt (Plain, 0%) 3 times daily for 12 weeks

Group Type EXPERIMENTAL

Resistance and Plyometric Exercise

Intervention Type BEHAVIORAL

12 weeks of Resistance (twice weekly) and Plyometric (once weekly) training

Greek Yogurt (0% Plain)

Intervention Type DIETARY_SUPPLEMENT

200g 3x/day for 12 weeks.

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.

Group Type PLACEBO_COMPARATOR

Resistance and Plyometric Exercise

Intervention Type BEHAVIORAL

12 weeks of Resistance (twice weekly) and Plyometric (once weekly) training

Placebo - Study Designed Supplement

Intervention Type DIETARY_SUPPLEMENT

Iso-energetic to yogurt. 3x/day for 12 weeks.

Interventions

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Resistance and Plyometric Exercise

12 weeks of Resistance (twice weekly) and Plyometric (once weekly) training

Intervention Type BEHAVIORAL

Greek Yogurt (0% Plain)

200g 3x/day for 12 weeks.

Intervention Type DIETARY_SUPPLEMENT

Placebo - Study Designed Supplement

Iso-energetic to yogurt. 3x/day for 12 weeks.

Intervention Type DIETARY_SUPPLEMENT

Eligibility Criteria

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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
Minimum Eligible Age

18 Years

Maximum Eligible Age

25 Years

Eligible Sex

MALE

Accepts Healthy Volunteers

Yes

Sponsors

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Brock University

OTHER

Sponsor Role lead

Responsible Party

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Andrea Josse

Assistant Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Andrea Josse, PhD

Role: PRINCIPAL_INVESTIGATOR

Brock University

Locations

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Brock University

St. Catharines, Ontario, Canada

Site Status

Countries

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Canada

References

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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.2019.00055. eCollection 2019.

Reference Type RESULT
PMID: 31114790 (View on PubMed)

Related Links

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Other Identifiers

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REB16-295

Identifier Type: -

Identifier Source: org_study_id

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