This study evaluated gender differences in the magnitude and timing of hamstring and quadriceps activation during activities that are believed to cause anterior cruciate ligament (ACL) injuries. Twelve men (age = 21.0 +/- 1.2 years; body mass = 81.61 +/- 13.3 kg; and jump height = 57.61 +/- 10.15 cm) and 12 women (age = 19.91 +/- 0.9 years; body mass = 64.36 +/- 6.14 kg; and jump height = 43.28...

Children with spastic cerebral palsy (CP) often develop hamstring contractures; however, the mechanism of contracture formation is not known. Contractures represent a resistance of muscle to increased length, but the structural elements responsible for increased stiffness are not known [1]. Previous work showed that single fibers from “contractured” muscle tissue has increased passive stiffness...

Abstract Objectives This study aimed to examine the effect of knee pain perception on muscle strength and endurance among elite female handball players. Methods included 60 players who participated in training competition from January December 2019. Muscle strength, endurance, hamstring/quadriceps ratio were estimated using Computer Sports Medicine, INC (Cybex, HUMAC, USA). The independent samp...

Six subjects between the ages of 18 and 35 years old were examined to compare muscle use. The rectus abdominus, erector spinal, gluteus maximus, quadriceps, hamstring, gastrocnemius, and tibiallis anterior muscles were assessed by electromyogram. Conventional exercise was performed by weight lifting on quadriceps, hamstring, abdominal and back extension machines and then compared to low-impact ...

PURPOSE To examine whether normalized quadriceps and hamstring strength would predict quadriceps and hamstring muscle activation amplitudes and whether these neuromuscular factors would predict knee kinematics and kinetics during a drop jump task. METHODS Thirty-nine females and 39 males were measured for isometric quadriceps and hamstring strength and were instrumented to obtain surface elec...

Br J Sports Med February 2012 Vol 46 No 2 81 Acute hamstring injuries are the most prevalent muscle injuries reported in sport. Despite a thorough and concentrated effort to prevent and rehabilitate hamstring injuries, injury occurrence and re-injury rates have not improved over the last three decades. This failure is most likely due to the following: (1) a lack of studies with high level of ev...

Hamstring muscle injuries are common in athletes and mostly consist of sprains at the myotendinous junction, which often respond well to conservative treatment. Proximal hamstring avulsion injuries, though less common, can be severely debilitating. This injury is often seen in water skiers but has been described in many other sports and in middle-aged patients. Complete avulsions in young and a...

Background. Hamstring injuries continue to affect active individuals and although inadequate muscle extensibility remains a commonly accepted factor, little is known about the most effective method to improve flexibility. Purpose. To determine if an isolated neurodynamic sciatic sliding technique would improve hamstring flexibility to a greater degree than stretching or a placebo intervention i...

Larger hip flexion range of motion with knee extension (hip ROM) and passive stiffness the hamstring is associated greater production isometric concentric torque at longer muscle lengths. Nevertheless, associations among ROM, hamstring, eccentric a length remain unclear. Therefore, we aimed to investigate association angle-torque relationship. Seventeen healthy male college students participate...