ArticleJournal of functional morphology and kinesiology2025
Impact of Hamstring Tightness on Muscle Activation in Healthy Young Adults.
Article in Journal of functional morphology and kinesiology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Effects of instrument assisted and functional soft tissue mobilization on hamstring flexibility and skinfold thickness in sedentary adults.Scientific reports · 2026Trial
- Age Associations with Hamstring Tightness, Trunk Flexibility, and Lumbar Lordosis in Sedentary Adult Females: A Cross-Sectional Study.Journal of musculoskeletal & neuronal interactions · 2026Article
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Authors and funding
10 authors.
Funding
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Abstract
backgroundHamstring tightness is highly prevalent in young adults and may negatively affect neuromuscular performance. Despite growing interest in the biomechanical and neuromuscular consequences of reduced flexibility, few studies have examined its effect on muscle activation in healthy individuals. This study aimed to compare thigh muscle activation during functional tasks in healthy young males with and without hamstring tightness.
methodsThirty healthy male participants (18-26 years) were assigned to two groups based on the Active Knee Extension test: normal flexibility (<20°) and hamstring tightness (≥20°). Surface electromyography (sEMG) was used to assess the activation (%MVIC) of the biceps femoris and semitendinosus muscles during four functional exercises: unilateral standing knee flexion, unilateral bridge, elastic-band knee flexion, and Nordic curl. Independent
resultsParticipants with hamstring tightness showed significantly lower activation of the semitendinosus during the unilateral bridge (
conclusionsHamstring tightness is associated with reduced activation of key posterior thigh muscles during exercises that require high eccentric or isometric demands. These neuromuscular alterations may impair performance and increase the risk of injury in functional tasks. Clinically, assessing and addressing hamstring flexibility may support muscle recruitment efficiency and injury prevention strategies in young physically active populations.
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