Hamstring and quadriceps muscles are essential for the performance of athletes in various sport branches. Hamstring muscles control running activities and stabilize the knee during turns or tackles, while quadriceps muscles play an important role in jumping and kicking. Although hamstring and quadriceps muscle strength in athletes can be accurately measured using isokinetic dynamometry, practic...

Introduction: The slump test is used in athletes with suspected hamstring strains to determine the presence of neural mechanosensitivity. Other than cadaveric investigations, limited evidence exists regarding this test with respect to the neuromuscular system. Aim: To examine the effect of the slump test on local muscular and neural structures in the posterior thigh in athletes with hamstring i...

There is no dispute that acute hamstring injury is a major sports injury, 1–6 particularly in football codes 2 3 5 6 and other sports that demand high-speed running. 1 The purpose of this editorial is to provide the reader with evidence-based tips for optimising hamstring injury prevention. Early return to sport (≤3 weeks) is often proposed for hamstring injuries, 7 even though basic research c...

BACKGROUND Hamstring muscle strains often recur. The authors studied the effect of the grade of initial injury on the subsequent risk of reinjury. HYPOTHESIS No difference in reinjury rate between acute low-grade (grades I and II) and high-grade (III and IV) hamstring muscle strains would be seen. STUDY DESIGN Cohort study (prognosis); Level of evidence, 1. METHODS Between 1999 and 2007, ...

the aim of study was to investigate and compare the concentric torque of quadriceps and hamstring muscles and timed-walking test in two groups. thus, one group of healthy subjects and one group of patients with low grade of tibiofemoral osteoarthritis (oa) were selected. concentric torque of quadriceps and hamstring were measured in both groups. besides, pain measurement, timed-walking test, ra...

The purpose of this study was to characterize the effect of speed and influence of individual muscles on hamstring stretch, loading, and work during the swing phase of sprinting. We measured three-dimensional kinematics and electromyography (EMG) activities of 19 athletes sprinting on a treadmill at speeds ranging from 80% to 100% of maximum speed. We then generated muscle-actuated forward dyna...

Theoretical compensation after anterior cruciate ligament (ACL) tear could cause quadriceps weakness and hamstring activation, preventing anterior tibial subluxation and affecting the expected hamstring-to-quadriceps ratio. Although quadriceps weakness often occurs after ACL tears, it remains unclear whether hamstring strength and hamstring-to-quadriceps ratio increase in ACL deficient knees. T...

The purpose of our investigation was to compare, for the hamstring and quadriceps femoris muscles, peak torque values uncorrected for gravity with the peak torque values corrected for gravity and to determine the effect of making this correction on the hamstring to quadriceps femoris muscle peak torque ratio at slow and fast isokinetic speeds. We measured peak torques isokinetically at 60 degre...

Yoga is believed to be a safe practice; nonetheless, as the number of yoga practitioners has grown, so incidence yoga-related injuries. Overall, lower extremity injuries comprised 64% total injuries; specifically, hip, hamstring, knee, ankle, feet and toe. Although few research studies have quantified hamstring muscle activities in various asanas, evidence correlating it functional anatomy scar...