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CompletedNCT01776359RIPPEDUpdated Jun 9, 2015

Effects of High Protein Intake With Intense Exercise and Energy Deficit

An interventional study of High Protein and Low Protein in Overweight, sponsored by McMaster University. Completed at 1 site in Canada. Open to male participants aged 18 Years to 30 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2015-06-09.

Sponsored by McMaster University · Not applicable, Interventional, and Basic science

Phase
Not applicable
Study type
Interventional
Enrollment
40
Allocation
Randomized
Ages
18 Years to 30 Years
Sex
Male
01

Study 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.

02

Conditions studied

  • Overweight

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Keywords

  • Muscle
  • Protein
  • Diet
  • Exercise
03

In context

Overweight

3,670 studies on the registry are indexed under Overweight; 849 are open to participants now.

This study's enrollment of 40 is below the median of 73 across 3,175 interventional studies indexed under Overweight.

Browse Overweight studies →

Lead sponsor

McMaster University is the lead sponsor of 720 studies on the registry; 124 are open to participants now.

Of its 6 completed or terminated interventional studies of FDA-regulated products, 2 (33%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 30 Years
Sexes eligible
Male
Accepts healthy volunteers
Yes

Inclusion criteria

  • 18-30 males
  • Healthy

Exclusion criteria

Exclusion Criteria:

  • more than 15% body fat
  • 35-50ml/kg/min VO2
  • BMI grater than 27
05

Study design

Phase
Not applicable
Primary purpose
Basic science
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Participant)
Enrollment
40 participants (actual)

Study arms

  • Active comparator
    High Protein

    High Protein

    Dietary Supplement: High Protein

  • Placebo comparator
    Low Protein

    Low Protein

    Dietary Supplement: Low Protein

Interventions

  • Dietary supplementHigh Protein

    2.4g/kg of protein

  • Dietary supplementLow Protein

    1.2g/kg of protein

06

What researchers measure

Primary outcomes

  1. Body Composition

    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.

    Time frame: 4 weeks

Secondary outcomes

  1. Psychological state

    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.

    Time frame: 4 weeks

07

Study locations

1 site
  • McMaster University
    Hamilton, Ontario L8S 4L8, Canada
08

References and documents

Publications

  • Mettler S, Mitchell N, Tipton KD. Increased protein intake reduces lean body mass loss during weight loss in athletes. Med Sci Sports Exerc. 2010 Feb;42(2):326-37. doi: 10.1249/MSS.0b013e3181b2ef8e. PubMed 19927027 ↗
  • Demling RH, DeSanti L. Effect of a hypocaloric diet, increased protein intake and resistance training on lean mass gains and fat mass loss in overweight police officers. Ann Nutr Metab. 2000;44(1):21-9. doi: 10.1159/000012817. PubMed 10838463 ↗
  • Butterfield GE, Calloway DH. Physical activity improves protein utilization in young men. Br J Nutr. 1984 Mar;51(2):171-84. doi: 10.1079/bjn19840021. PubMed 6704368 ↗
  • Longland TM, Oikawa SY, Mitchell CJ, Devries MC, Phillips SM. Higher compared with lower dietary protein during an energy deficit combined with intense exercise promotes greater lean mass gain and fat mass loss: a randomized trial. Am J Clin Nutr. 2016 Mar;103(3):738-46. doi: 10.3945/ajcn.115.119339. Epub 2016 Jan 27. PubMed 26817506 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 9, 2015, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT01776359
Lead sponsor
McMaster University
Responsible party
Stuart M. Phillips (PhD, McMaster University) — Principal investigator
First posted
Jan 28, 2013
Start date
Feb 2013
Primary completion
Jul 2014
Completion
Dec 2014
Last update
Jun 9, 2015

Study contacts

Stuart M Phillips, PhD
principal investigator · McMaster University

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Jun 2015. You cannot join it, but the record below documents what was studied.

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