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Effects of High Protein Intake With Intense Exercise and Energy Deficit (RIPPED)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01776359
Recruitment Status : Completed
First Posted : January 28, 2013
Last Update Posted : June 9, 2015
Information provided by (Responsible Party):
Stuart M. Phillips, McMaster University

Brief Summary:
A four week intervention will take place with the participants. They will undergo 6 days a week of high intensity training. They will also be at a 40% energy deficiency. One group will have a normal intake of protein, 1.2g/kg, while the other will have 2.4g/kg. It is our thesis that the participants with the higher protein will retain more lean mass.

Condition or disease Intervention/treatment Phase
Overweight Dietary Supplement: High Protein Dietary Supplement: Low Protein Not Applicable

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 40 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Participant)
Primary Purpose: Basic Science
Official Title: Effects of High Protein Intake With Intense Exercise and Energy Deficit
Study Start Date : February 2013
Actual Primary Completion Date : July 2014
Actual Study Completion Date : December 2014

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Active Comparator: High Protein
High Protein
Dietary Supplement: High Protein
2.4g/kg of protein

Placebo Comparator: Low Protein
Low Protein
Dietary Supplement: Low Protein
1.2g/kg of protein

Primary Outcome Measures :
  1. Body Composition [ Time Frame: 4 weeks ]
    To compare the effect of normal protein intake (1.2 g/kg per day) and increased protein intake (2.4 g/kg per day) on body composition over a 4 week period of energy restriction in young males (18-30), with intense exercise training. Body composition will be measured via DXA, Bod Pod, Bio-impedance, skin folds.

Secondary Outcome Measures :
  1. Psychological state [ Time Frame: 4 weeks ]
    To compare the psychological state of the participants, before, during and after the intervention. To see if the mind will grow with the body as high intensity exercise is performed, or whether the mind will tire and scores will be reduced. Measurement tactics will in include POMS, and PANAS questionnaires for mood, and stroop, isometric hand grip, operation span test, and vigilance task.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 30 Years   (Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • 18-30 males
  • Healthy

Exclusion Criteria:

  • more than 15% body fat
  • 35-50ml/kg/min VO2
  • BMI grater than 27

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01776359

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Canada, Ontario
McMaster University
Hamilton, Ontario, Canada, L8S 4L8
Sponsors and Collaborators
McMaster University
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Principal Investigator: Stuart M Phillips, PhD McMaster University
Publications automatically indexed to this study by Identifier (NCT Number):
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Responsible Party: Stuart M. Phillips, PhD, McMaster University Identifier: NCT01776359    
Other Study ID Numbers: REB 12-670
First Posted: January 28, 2013    Key Record Dates
Last Update Posted: June 9, 2015
Last Verified: June 2015
Keywords provided by Stuart M. Phillips, McMaster University:
Additional relevant MeSH terms:
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Body Weight