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The Effects of Lifting Light or Heavy Weights on Muscle Growth and Strength in Trained Young Men

NCT02139865 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 50

Last updated 2018-03-19

No results posted yet for this study

Summary

When practicing weightlifting regularly the body makes new proteins within the muscle.

These new proteins can increase the size of the cells within the muscle to make them larger, a process called hypertrophy. The common convention surrounding gains in skeletal muscle size and strength is that heavy weights are needed. In contrast, lifting lighter weights are thought to be required to induce muscular endurance and not to promote growth. However, it has previously been shown in untrained men that lifting lighter weights results in similar gains in muscle mass and strength as lifting heavier weights. The purpose of this study is to examine how performing resistance training of different intensities (light or heavy weights) affects the degree of muscle growth and strength gain in individuals who are already resistance training.

This information will be valuable when designing exercise protocols for increasing muscle size and strength at all ages, or in individuals returning from injury, as a way to stimulate muscle growth and promote strength gains without the need to lift heavy weights.

Conditions

  • Skeletal Muscle Hypertrophy
  • Muscle Weakness

Interventions

BEHAVIORAL

30% 1RM

Participant exercises using a protocol tailored at 30% of their 1RM

BEHAVIORAL

80% 1RM

Participant exercises using a protocol tailored at 80% of their 1RM

Sponsors & Collaborators

Principal Investigators

  • Stuart Phillips, Ph.D. · McMaster University

Study Design

Allocation
RANDOMIZED
Purpose
OTHER
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
30 Years
Sex
MALE
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2014-05-31
Primary Completion
2015-12-31
Completion
2016-03-31

Countries

  • Canada

Study Locations

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Entities

Companies

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT02139865 on ClinicalTrials.gov