- ICH GCP
- Registro degli studi clinici negli Stati Uniti
- Sperimentazione clinica NCT02179307
Individual Response to Different Volumes of Resistance Training
Determinants of Intra-individual Variation in Adaptability to Resistance Training of Different Volumes
The literature is not clear as to which training volume to employ during initial phases of resistance training programs to ensure optimal muscular adaptations. The purpose of this study is therefore to compare effects of strength training with low versus moderate volume on muscular function and hypertrophy in previously untrained, healthy individuals. Furthermore, the investigators will relate individual variation in responses to proxy markers of individual training state, such as baseline muscular function and muscle fiber type.
The study will include 25 women and 25 men and will consist of a 12-week resistance training protocol. Each study participant will act as their own control, performing both the low- (1-set) and the moderate-volume (3-sets) protocol, allocated to either the dominant or non-dominant leg, in a stratified and randomized fashion.
Primary outcome measures are thigh muscle cross section area and unilateral knee extension strength. Additionally, muscle fiber type composition will be evaluated as well as additional parameters of muscular function.
The primary hypothesis is that low-volume protocols will be beneficial for individuals with glycolytic muscle phenotypes, whereas the opposite will be true for individuals with more aerobic phenotypes.
Panoramica dello studio
Stato
Condizioni
Intervento / Trattamento
Tipo di studio
Iscrizione (Effettivo)
Fase
- Non applicabile
Contatti e Sedi
Luoghi di studio
-
-
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Lillehammer, Norvegia
- Lillehammer University College
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Criteri di partecipazione
Criteri di ammissibilità
Età idonea allo studio
Accetta volontari sani
Sessi ammissibili allo studio
Descrizione
Inclusion Criteria:
- Healthy
- Non-smoking
- Able to tolerate resistance exercise training
Exclusion Criteria:
- Presence or history of cardiovascular, metabolic, endocrine or neuromuscular disease
- Diagnosed mental health disorder
- Intolerance to local anesthetic
- No experience with exercise training
- Performing regular resistance training (more than 1 session per week during last 12 months)
- Impaired strength/ neuromuscular function due to previous injury
- Recurrent pain in lower back, knee or shoulders
- Taking prescribed medication that may affect outcome of training intervention
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Scienza basilare
- Assegnazione: N / A
- Modello interventistico: Assegnazione di gruppo singolo
- Mascheramento: Nessuno (etichetta aperta)
Armi e interventi
Gruppo di partecipanti / Arm |
Intervento / Trattamento |
|---|---|
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Sperimentale: Arm label 1-Set, 3-Set
12-week progressive strength training protocol of different volumes
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Every study participant will complete 12 weeks of progressive strength training with one leg performing 1-set per exercise per session and the contralateral leg performing 3-sets per exercise per session.
Allocation of dominant/non-dominant leg to either 1- or 3-set protocol will be done in a stratified, randomized fashion (stratified with regard to sex and baseline strength).
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Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Thigh muscle cross-sectional area
Lasso di tempo: Week 0 (baseline) and 12 (post training intervention)
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Changes in muscle cross sectional area of each thigh from baseline to post intervention, assessed by MRI.
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Week 0 (baseline) and 12 (post training intervention)
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Unilateral knee-extension isometric strength
Lasso di tempo: Week 0 (baseline), 2, 5, 9 (during intervention) and 12 (after training intervention)
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Time course changes in maximum knee extensor, isometric strength evaluated at 120° knee angle (180° fully extended).
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Week 0 (baseline), 2, 5, 9 (during intervention) and 12 (after training intervention)
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Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Muscle strength
Lasso di tempo: Week 0 (baseline), 2, 5, 9 (during intervention) and 12 (after training intervention)
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Time course changes in maximum isoinertial strength defined by one-repetition maximum in leg press, knee extension, knee flexion, and bench press.
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Week 0 (baseline), 2, 5, 9 (during intervention) and 12 (after training intervention)
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Knee extensors and flexors force-velocity relationship
Lasso di tempo: Week 0 (baseline), 2, 5, 9 (during intervention) and 12 (after training intervention)
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Time course changes in torque measured during maximal voluntary isokinetic contraction at 60°, 120° and 240° ∙ sec-1.
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Week 0 (baseline), 2, 5, 9 (during intervention) and 12 (after training intervention)
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Blood hormonal profiles
Lasso di tempo: Week 0 (baseline), 2 and 12 (post training intervention)
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Resting (week 0, 2 and 12) and acutely exercise-induced (week 2) hormonal profiles (testosterone, insulin-like growth factor 1, growth hormone and cortisol) determined in serum from venous blood samples.
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Week 0 (baseline), 2 and 12 (post training intervention)
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Muscle fiber cross-sectional area
Lasso di tempo: Week 0 (baseline), 2 and 12 (post training intervention)
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Changes in muscle fiber cross-sectional area assessed by immunohistochemistry from muscle biopsy.
Determined from muscle biopsy samples (Vastus lateralis).
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Week 0 (baseline), 2 and 12 (post training intervention)
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Protein expression
Lasso di tempo: Week 0 (baseline), 2 and 12 (post training intervention)
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Changes in relative abundance of contractile protein isoforms (myosin heavy chain).
Modification of proteins related to muscle hypertrophy in relation to an acute exercise session (assessed during week 2 of the intervention).
Determined from muscle biopsy samples (Vastus lateralis).
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Week 0 (baseline), 2 and 12 (post training intervention)
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Gene expression
Lasso di tempo: Week 0 (baseline), 2 and 12 (post training intervention)
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Changes in gene expression related to skeletal muscle hypertrophy and structural phenotype measured in steady state conditions (biopsy sampled in resting conditions, week 0, 2 and 12) and in relation to acute exercise (biopsy sampled 1-h after strength exercise, week 2).
Determined from muscle biopsy samples (Vastus lateralis).
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Week 0 (baseline), 2 and 12 (post training intervention)
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Altre misure di risultato
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Body composition changes
Lasso di tempo: Week 0 (baseline) and 12 (post training intervention)
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Changes in body compositions (lean mass and fat mass) from prior intervention to after intervention assessed by dual x-ray absorptiometry scan.
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Week 0 (baseline) and 12 (post training intervention)
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Habitual physical activity
Lasso di tempo: Week 0
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Self-reported prior habitual physical activity assessed by questionnaire and interview before training intervention
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Week 0
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Daily nutrient intake
Lasso di tempo: Week 6
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Daily nutrient intake assessed by a 4-day food intake registration.
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Week 6
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Collaboratori e investigatori
Investigatori
- Investigatore principale: Stian Ellefsen, PhD, Inland Norway University of Applied Sciences
Studiare le date dei record
Studia le date principali
Inizio studio
Completamento primario (Effettivo)
Completamento dello studio (Effettivo)
Date di iscrizione allo studio
Primo inviato
Primo inviato che soddisfa i criteri di controllo qualità
Primo Inserito (Stima)
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Stima)
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Parole chiave
Altri numeri di identificazione dello studio
- Trainsome 2014#002
Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .