Acute Effects of Proprioceptive Neuromuscular Facilitation on Hamstring-to-Quadriceps Strength Ratio (Acute Effects)
Acute Effects of Proprioceptive Neuromuscular Facilitation and Static Stretching on Hamstring-to-Quadriceps Strength Ratio in Healthy Young Men
Studie Overzicht
Toestand
Interventie / Behandeling
Gedetailleerde beschrijving
The present study investigated the acute effects of two commonly used stretching modalities-proprioceptive neuromuscular facilitation (PNF) and static stretching-on isokinetic muscle strength and hamstring-to-quadriceps (H/Q) ratios in physically active healthy young males. The study employed a randomized crossover design with repeated measures, allowing each participant to complete both experimental conditions under standardized laboratory settings.
Participants attended three sessions: a familiarization session followed by two experimental sessions separated by at least 48 hours. Each experimental session included a standardized warm-up, followed by either PNF or static stretching intervention, and subsequent isokinetic strength testing. Peak torque values for quadriceps (concentric) and hamstrings (concentric and eccentric) were measured using an isokinetic dynamometer at 60°/s. Traditional and functional H/Q ratios were calculated.
The primary aim was to determine whether these stretching modalities produce acute alterations in muscle strength and H/Q ratios. The study also examined whether the type of ratio (traditional vs. functional) significantly influences outcomes. Findings contribute to understanding the neuromuscular implications of stretching in warm-up protocols.
Studietype
Inschrijving (Werkelijk)
Fase
- Niet toepasbaar
Contacten en locaties
Studie Locaties
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Trabzon, Ordu, Giresun, Rize, Artvin, Gümüşhane
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Gümüşhane, Trabzon, Ordu, Giresun, Rize, Artvin, Gümüşhane, Turkije (Türkiye), 29600
- Gumushane Univetsity
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Deelname Criteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
- Volwassen
Accepteert gezonde vrijwilligers
Beschrijving
Inclusion Criteria:
- Age between 18 - 25 years, healthy male individuals
- Physically active (≥3 days/week, ≥30 min/day)
Exclusion Criteria:
- Musculoskeletal injury in the last 6 months
- Any neurological or orthopedic disorder
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
- Primair doel: Ander
- Toewijzing: Gerandomiseerd
- Interventioneel model: Crossover-opdracht
- Masker: Geen (open label)
Wapens en interventies
Deelnemersgroep / Arm |
Interventie / Behandeling |
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Experimenteel: PNF Stretching
Participants performed four repetitions of PNF stretching consisting of a 6-second isometric hamstring contraction at approximately 60% of maximal voluntary contraction followed by a 30-second passive stretch.
Rest intervals were standardized.
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Participants performed four repetitions of PNF stretching consisting of a 6-second isometric hamstring contraction at approximately 60% of maximal voluntary contraction followed by a 30-second passive stretch.
Rest intervals were standardized.
Participants performed four repetitions of static hamstring stretching, each lasting 30 seconds, with 30-second rest intervals between repetitions.
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Experimenteel: Static Stretching
Participants performed four repetitions of static hamstring stretching, each lasting 30 seconds, with 30-second rest intervals between repetitions
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Participants performed four repetitions of PNF stretching consisting of a 6-second isometric hamstring contraction at approximately 60% of maximal voluntary contraction followed by a 30-second passive stretch.
Rest intervals were standardized.
Participants performed four repetitions of static hamstring stretching, each lasting 30 seconds, with 30-second rest intervals between repetitions.
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Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
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Hamstring-to-Quadriceps (H/Q) Ratio
Tijdsspanne: Immediately after intervention
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Both traditional (Hcon/Qcon) and functional (Hecc/Qcon) ratios were calculated using isokinetic peak torque values.
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Immediately after intervention
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Secundaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
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Quadriceps Concentric Peak Torque
Tijdsspanne: Immediately post-intervention
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Quadriceps Concentric Peak Torque
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Immediately post-intervention
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Hamstring Concentric Peak Torque
Tijdsspanne: Immediately post-intervention
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Hamstring Concentric Peak Torque
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Immediately post-intervention
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Hamstring Eccentric Peak Torque
Tijdsspanne: Immediately post-intervention
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Hamstring Eccentric Peak Torque
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Immediately post-intervention
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Medewerkers en onderzoekers
Sponsor
Studie record data
Bestudeer belangrijke data
Studie start (Werkelijk)
Primaire voltooiing (Werkelijk)
Studie voltooiing (Werkelijk)
Studieregistratiedata
Eerst ingediend
Eerst ingediend dat voldeed aan de QC-criteria
Eerst geplaatst (Werkelijk)
Updates van studierecords
Laatste update geplaatst (Werkelijk)
Laatste update ingediend die voldeed aan QC-criteria
Laatst geverifieerd
Meer informatie
Termen gerelateerd aan deze studie
Trefwoorden
Aanvullende relevante MeSH-voorwaarden
Andere studie-ID-nummers
- 2025/169
Plan Individuele Deelnemersgegevens (IPD)
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Beschrijving IPD-plan
Informatie over medicijnen en apparaten, studiedocumenten
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