adductors

Hamstring and Thigh Rehabilitation: 50 Evidence-Based Biomechanics Analyses is an open educational collection from the MMSx Authority Applied Biomechanics Lab (MMSx Authority Institute for Movement Mechanics & Biomechanics Research, Inc.). It contains 50 articles covering hamstring strain, quadriceps and groin injury, return to sprinting and thigh load. Each article pairs a biomechanical analysis of three movements (four 1080 × 1350 analysis slides) with verified research data, a three-step decision pathway (modify, load, track), cautions on when to seek assessment, and APA 7 references with DOIs. Biomechanics is treated as a mechanical decision science: force, direction, dose and tissue tolerance. Files: the full collection as one PDF; all 200 slides with the DOI on each slide; the website edition (HTML articles). Online edition: https://mmsxauthority.org/edu/analysis/hamstring-thigh/ The figures are educational estimates made from illustrated reference figures; they are not measurements of a patient and are not a diagnosis or a substitute for individual clinical assessment. Articles01. Hamstring strain: why it is the most common injury in running sports02. Hamstring pain when sprinting: what happens in the late swing phase03. Pulled hamstring: grade 1, 2 or 3, and what each means for recovery04. Hamstring tear: when a tendon injury needs a surgical opinion05. Proximal hamstring tendinopathy: pain at the sitting bone06. Pain when sitting: when the hamstring tendon is the source07. Hamstring re-injury: why it comes back and how to lower the risk08. Nordic hamstring curl: what the injury-prevention evidence shows09. Eccentric hamstring strength: why lengthening control matters10. Tight hamstrings: stiffness, protective tension or nerve sensitivity?11. Hamstring stretching: does it prevent injury or just change tolerance?12. Return to running after a hamstring strain: criteria, not calendar days13. Hamstring injury in footballers: high-speed running and fatigue14. Hip extension versus knee flexion exercises: training both hamstring roles15. Romanian deadlift for hamstrings: loading the hip hinge safely16. Hamstring pain behind the knee: tendon, nerve or knee joint?17. Sciatic nerve sensitivity: when "tight hamstrings" is a nerve sign18. Slump and straight-leg raise tests: what they tell you about the nerve19. Hamstring cramps: fatigue, hydration and what the evidence supports20. Hamstring muscle bruise versus strain: telling them apart21. Quadriceps strain: the kicking and sprinting injury22. Rectus femoris injury: why the two-joint quadriceps is vulnerable23. Thigh bruise (dead leg): recovery and when it can calcify24. Myositis ossificans: when a thigh bruise turns to bone25. Quadriceps weakness after knee injury: why it lingers26. Quadriceps tendinopathy: pain above the kneecap27. Front-of-thigh pain when squatting: load, depth and knee position28. Groin strain: adductor injury in change-of-direction sports29. Adductor longus pain: the most commonly injured groin muscle30. Copenhagen adduction exercise: preventing groin injury31. Inner thigh pain: muscle, tendon, hip joint or hernia?32. IT band pain: why stretching the band rarely fixes it33. Outer thigh pain: gluteal tendon, IT band or referred pain?34. Meralgia paraesthetica: burning outer-thigh pain from a nerve35. Thigh muscle imbalance: what the hamstring-to-quadriceps ratio means36. Hamstring-to-quadriceps ratio and ACL risk: what is proven37. Single-leg strength differences: when thigh asymmetry matters38. Thigh muscle loss with age: sarcopenia, strength and falls39. Thigh pain in runners: stress reaction, strain or overload?40. Femoral stress fracture: deep thigh pain that should not be ignored41. Thigh pain after a long run: soreness or injury?42. DOMS in the thighs: why eccentric work hurts days later43. Sprinting technique and hamstring load: posture, stride and pelvis44. Pelvic tilt and hamstring strain: does the pelvis matter?45. Glute weakness and hamstring overload: the shared hip-extension job46. Hamstring injuries in older athletes: masters sport and tendon health47. Thigh compartment syndrome: severe swelling after impact or exertion48. Deep vein thrombosis: calf or thigh pain that is not a muscle injury49. Thigh red flags: when thigh pain needs urgent medical care50. Returning to sport after a thigh injury: strength, speed and confidence tests

matched text: “adductor”

Introduction This study examined changes in lower-extremity thermal asymmetry following simulated match-play in U17 female handball players and evaluated their relationships with global rating of perceived exertion (RPE) and self-reported hand preference. Software-defined thermal alert categories were summarized descriptively. Methods A single-group pretest-posttest quasi-experimental design was used. Thirty-five U17 female national-team handball players completed a 50-min match simulation consisting of five 10-min blocks. Bilateral thermal asymmetry in six lower-extremity regions was assessed before the simulation and after a standardized 10-min post-simulation recovery period using infrared thermography and automated region-of-interest segmentation in ai4sports. Global RPE was recorded using the Borg CR10 scale. Holm-adjusted p values were calculated within each family of multiple comparisons. Results After Holm correction, thermal asymmetry increased significantly in the rectus femoris (mean change = 0.134 °C, adjusted p < 0.001, dz = 0.75), vastus group (mean change = 0.163 °C, adjusted p = 0.027, dz = 0.49), and gastrocnemius (mean change = 0.246 °C, adjusted p = 0.018, dz = 0.53). Changes in the hamstrings, hip adductors, and tibialis anterior were not significant after adjustment. RPE increased from 2.23 ± 0.49 to 6.03 ± 1.25 ( p < 0.001, Rosenthal r = 0.88; rank-biserial r = 1.00). No statistically detectable association was observed between post-simulation RPE and thermal-asymmetry changes; confidence intervals were compatible with effects in both directions. No hand-preference comparison remained significant after Holm correction. Descriptively, 12 of 35 athletes (34.3%) showed at least one region in the software-defined Caution or Urgent category. Conclusion Global perceived exertion increased substantially, while regional thermal-asymmetry responses varied across anatomical regions. No statistically detectable association between RPE and regional thermal changes was observed in this sample, although moderate associations cannot be excluded because of limited precision. Automated thermal image analysis may standardize region-of-interest extraction, but the observed asymmetries and software-defined alert categories should not be interpreted as diagnostic or injury-prediction measures.

matched text: “adductors”