Upper Versus Lower Limb Responses to Higher Versus Lower Load Resistance Training in Young Men
Variability in Resistance Training-induced Hypertrophy and Strength Are Independent of Load and Limb Location in Healthy Young Men
연구 개요
상태
상태
정황
정황
개입 / 치료
개입 / 치료
상세 설명
Each participant will come to the Exercise Metabolism Research Laboratory gym three times per week for 10 weeks to perform lower- and upper-body resistance exercise training with both relatively heavy- (~80% one repetition maximum [1RM]) and light- (~40 %1RM) loads. One arm and one leg will be randomized to lift with relatively heavy loads such that the other arm and leg will be randomized to lift with relatively light loads. Each workout will be supervised by a study investigator.
The time commitment of this study is 12 weeks (including pre- and post-study testing). Each workout to take 30 minutes and, with testing days included, the investigators foresee a total time commitment of 41 hours, or just under three and half hours per week.
The pre- and post-study measurements include muscle biopsies, dual x-ray absorptiometry scans, ultrasonography scans, 1RM assessment, and maximum voluntary contraction assessment. The muscle biopsies will be taken from each of the participant's vastus lateralis to assess muscle fibre cross sectional area in both legs during the beginning (four biopsies) and end (four biopsies) of the intervention. The dual x-ray absorptiometry scans are used to assess body composition and will be done pre- and post-intervention. The ultrasonography scans will be used to assess biceps brachii and vastus laterals thickness and cross sectional area. The ultrasound scans will be assessed during the beginning (four scans) and end (four scans) of the intervention. The 1RM assessment will include 1RM testing on a knee extension machine and biceps curl machine and will be done at the beginning and end of the intervention. The maximum voluntary contraction assessment will be performed on a System 3 Biodex Dynamometer (Shirley, NY, USA), which is an immovable machine that the participants contract against to measure their peak force. The maximum voluntary contractions will be recorded three times: twice at the beginning of the intervention and once at the end of the intervention.
연구 유형
연구 유형
등록 (실제)
등록
단계
단계
- 해당 없음
연락처 및 위치
연구 장소
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Ontario
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Hamilton, Ontario, 캐나다, L8S 4K1
- Exercise Metabolism Research Laboratory, McMaster Univeristy
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참여기준
자격 기준
자격 기준
공부할 수 있는 나이
건강한 자원 봉사자를 받아들입니다
연구 대상 성별
설명
Inclusion Criteria:
- Be between the ages of 18-30 years (inclusive)
- Be able to maintain a habitual diet and perform resistance exercise three times per week throughout the trial
- Be in general good health (assessed by Get Active Questionnaire)
- Understand the study procedures and sign this form providing informed consent to participate in the study.
Exclusion Criteria:
- Use of tobacco or related products
- A history of neuromuscular problems or muscle and/or bone wasting diseases
- Any acute or chronic illness; cardiac, pulmonary, liver, or kidney abnormalities; insulin- or non-insulin-dependent diabetes or other metabolic disorders (all ascertained through medical questionnaires)
- Use of medications known to affect protein metabolism (i.e. corticosteroids, non-steroidal anti-inflammatory drugs (prescription use or daily use of over the counter medication), or prescription strength acne medications)
공부 계획
연구는 어떻게 설계됩니까?
디자인 세부사항
- 주 목적: 기초 과학
- 할당: 무작위
- 중재 모델: 병렬 할당
- 마스킹: 하나의
팔의 수
무기와 개입
참가자 그룹 / 팔참가자 그룹 / 팔 |
개입 / 치료개입 / 치료 |
|---|---|
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실험적: Higher Load
One arm and one leg were randomized (based on limb dominance) to perform unilateral biceps curls (arm) and knee extensions (leg) with relatively higher loads (80 % of their one-repetition maximum).
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The participants performed three sets of their unilateral resistance exercise (biceps curls and knee extensions) three times per week for 10 weeks.
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실험적: Lower Load
The other arm and leg were randomized (based on limb dominance) to perform unilateral biceps curls (arm) and knee extensions (leg) with relatively higher loads (80 % of their one-repetition maximum).
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The participants performed three sets of their unilateral resistance exercise (biceps curls and knee extensions) three times per week for 10 weeks.
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연구는 무엇을 측정합니까?
주요 결과 측정
주요 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
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Change in fat-free mass
기간: up to 12 weeks
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Measured by dual x-ray absorptiometry pre- and post-training
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up to 12 weeks
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Change in vastus lateralis thickness
기간: up to 12 weeks
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Measured by ultrasonography pre- and post-training
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up to 12 weeks
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Change in vastus lateralis cross sectional area
기간: up to 12 weeks
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Measured by ultrasonography pre- and post-training
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up to 12 weeks
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Change in biceps brachii thickness
기간: up to 12 weeks
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Measured by ultrasonography pre- and post-training
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up to 12 weeks
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Change in biceps brachii cross sectional area
기간: up to 12 weeks
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Measured by ultrasonography pre- and post-training
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up to 12 weeks
|
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Change in muscle fibre cross sectional area
기간: up to 12 weeks
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Measured by muscle biopsies from the vastus lateralis pre- and post-training
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up to 12 weeks
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공동 작업자 및 조사자
수사관
수사관
- 수석 연구원: Stuart Phillips, PhD, McMaster University
연구 기록 날짜
연구 주요 날짜
연구 시작 (실제)
연구 시작
기본 완료 (실제)
기본 완료
연구 완료 (실제)
연구 완료
연구 등록 날짜
최초 제출
최초 제출
QC 기준을 충족하는 최초 제출
QC 기준을 충족하는 최초 제출
처음 게시됨 (실제)
처음 게시됨
연구 기록 업데이트
마지막 업데이트 게시됨 (실제)
마지막 업데이트 게시됨
QC 기준을 충족하는 마지막 업데이트 제출
QC 기준을 충족하는 마지막 업데이트 제출
마지막으로 확인됨
마지막으로 확인됨
추가 정보
이 연구와 관련된 용어
추가 관련 MeSH 약관
기타 연구 ID 번호
기타 연구 ID 번호
- HIREB 4774
개별 참가자 데이터(IPD) 계획
개별 참가자 데이터(IPD)를 공유할 계획입니까?
IPD 계획 설명
약물 및 장치 정보, 연구 문서
미국 FDA 규제 의약품 연구
미국 FDA 규제 기기 제품 연구
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