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
調査の概要
状態
状態
条件
条件
介入・治療
介入・治療
詳細な説明
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.
研究の種類
研究の種類
入学 (実際)
入学
段階
段階
- 適用できない
連絡先と場所
研究場所
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Ontario
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Hamilton、Ontario、カナダ、L8S 4K1
- Exercise Metabolism Research Laboratory, McMaster Univeristy
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参加基準
適格基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
説明
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)
研究計画
研究はどのように設計されていますか?
デザインの詳細
- 主な目的:基礎科学
- 割り当て:ランダム化
- 介入モデル:並列代入
- マスキング:独身
アーム数
武器と介入
参加者グループ / アーム参加者グループ / アーム |
介入・治療介入・治療 |
|---|---|
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実験的: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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実験的: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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この研究は何を測定していますか?
主要な結果の測定
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
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Change in fat-free mass
時間枠: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
時間枠: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
時間枠: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
時間枠: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
時間枠: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
時間枠: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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協力者と研究者
捜査官
捜査官
- 主任研究者:Stuart Phillips, PhD、McMaster University
研究記録日
主要日程の研究
研究開始 (実際)
研究開始
一次修了 (実際)
一次修了
研究の完了 (実際)
研究の完了
試験登録日
最初に提出
最初に提出
QC基準を満たした最初の提出物
QC基準を満たした最初の提出物
最初の投稿 (実際)
最初の投稿
学習記録の更新
投稿された最後の更新 (実際)
投稿された最後の更新
QC基準を満たした最後の更新が送信されました
QC基準を満たした最後の更新が送信されました
最終確認日
最終確認日
詳しくは
本研究に関する用語
追加の関連 MeSH 用語
その他の研究ID番号
その他の研究ID番号
- HIREB 4774
個々の参加者データ (IPD) の計画
個々の参加者データ (IPD) を共有する予定はありますか?
IPD プランの説明
医薬品およびデバイス情報、研究文書
米国FDA規制医薬品の研究
米国FDA規制機器製品の研究
この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。
Unilateral resistance exerciseの臨床試験
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