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

This study is ongoing, but not recruiting participants.
Information provided by (Responsible Party):
Stuart M. Phillips, McMaster University
ClinicalTrials.gov Identifier:
First received: January 14, 2013
Last updated: July 20, 2014
Last verified: July 2014

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 Intervention
Body Fat
Dietary Supplement: High Protein
Dietary Supplement: Low Protein

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Single Blind (Subject)
Primary Purpose: Health Services Research
Official Title: Effects of High Protein Intake With Intense Exercise and Energy Deficit

Resource links provided by NLM:

Further study details as provided by McMaster University:

Primary Outcome Measures:
  • Body Composition [ Time Frame: 4 weeks ] [ Designated as safety issue: No ]
    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:
  • Psychological state [ Time Frame: 4 weeks ] [ Designated as safety issue: No ]
    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.

Estimated Enrollment: 40
Study Start Date: February 2013
Estimated Study Completion Date: December 2014
Primary Completion Date: July 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
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


Ages Eligible for Study:   18 Years to 30 Years
Genders 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
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Please refer to this study by its ClinicalTrials.gov identifier: NCT01776359

Canada, Ontario
McMaster University
Hamilton, Ontario, Canada, L8S 4L8
Sponsors and Collaborators
McMaster University
Principal Investigator: Stuart M Phillips, PhD McMaster University
  More Information

Responsible Party: Stuart M. Phillips, PhD, McMaster University
ClinicalTrials.gov Identifier: NCT01776359     History of Changes
Other Study ID Numbers: REB 12-670
Study First Received: January 14, 2013
Last Updated: July 20, 2014
Health Authority: Canada: Hamilton Health Sciences

Keywords provided by McMaster University:

ClinicalTrials.gov processed this record on March 26, 2015