Hamstring Strain in Sprinting Athletes: Biomechanics, Risk Factors, and Injury Prevention Strategies
Bibliographic record
Abstract
Hamstring–related injuries, primarily hamstring strain, frequently affect both recreational and professional athletes, especially in sports that involve running, jumping, kicking, and sudden directional changes. This study presents a comprehensive analysis of HSIs, covering anatomical and biomechanical factors, kinematics, diagnostic methods, and strategies for prevention and treatment. Although the exact mechanism of HSIs during sprinting remains uncertain, no specific phase of the running cycle has been identified as presenting the highest risk. Stretch-induced HSIs, often triggered by excessive hip flexion and knee hyperextension, place significant stress on the proximal tendon and musculotendinous junction, particularly affecting the semimembranosus muscle. Risk factors for HSIs are categorized as non-modifiable (age, previous injuries, playing position) and modifiable (muscle weakness, fatigue, imbalances, limited flexibility, and poor neuromuscular control). Physiotherapy approaches that emphasize eccentric strength training—progressing through flexibility, stabilization, and specific strength phases—reduce injury rates, especially when integrated with concentric training in sprinting related sports
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".