Background: Contemporary studies have investigated the effects of bicycle saddle height for optimal performance and injury prevention. A recent review established a dynamic knee flexion angle of 25 ̊-30 ̊ for optimal economy, anaerobic power, and knee tracking (Bini et al., 2011: Sports Medicine, 41, 463-476). Muyor et al, (2011: Journal of Human Kinetics, 29, 15-23), investigated hamstring exten...

The persistence of coxsackievirus B1 in the muscles of mice with coxsackievirus B1-induced chronic myositis was investigated. Neonatal CD1 Swiss mice were inoculated with a myositis-causing variant of coxsackievirus B1 (Tucson strain). Hamstring muscle samples of diseased mice obtained at various times after inoculation were examined for the presence of infectious virus, viral RNA and histologi...

As part of the 2nd Berlin BedRest Study (BBR2-2), we investigated the pattern of muscle atrophy of the postero-lateral hip and hamstring musculature during prolonged inactivity and the effectiveness of two exercise countermeasures. Twenty-four male subjects underwent 60 days of head-down tilt bedrest and were assigned to an inactive control (CTR), resistive vibration exercise (RVE), or resistiv...

[Purpose] This study investigated the effects of the bridging plus exercise with heel lift on lower extremity muscles. [Subjects and Methods] Nine healthy males participated. The subjects performed bridging exercises under two conditions. Surface electromyography was used to measure the electrical activities of the medial hamstring (MH) and the gluteus maximus (GM) muscles. [Results] Activation...

PURPOSE To assess the immediate effect of hamstring and abdominal activation on pain levels as measured by the Numeric Pain Scale (NPS) and hip range of motion as measured by Ober's Test in people with lumbopelvic pain. METHODS Thirteen participants with lumbopelvic pain and positive Ober's Tests completed an exercise developed by the Postural Restoration Institute™ to recruit hamstrings and ...

BACKGROUND Type 2 diabetes (T2DM) patients are subject to muscle weakness. OBJECTIVES The aim of the study was an assessment of electromyographic (EMG) activity of knee muscles during isometric maximal voluntary contraction in the different disease durations of T2DM. METHODS Eighteen patients with less than 10 years and twelve patients with more than 10 years of T2DM were compared with nine...

OBJECTIVES To investigate whether there was a difference in hamstring length between patients with patellofemoral pain syndrome and healthy asymptomatic controls aged 18 to 35 years. DESIGN A cross-sectional observational study measuring hamstring length in patients and asymptomatic controls. SETTING Hospital physiotherapy department. PARTICIPANTS Two groups were tested; one group diagnos...

After anamnesis was taken, a PE was performed with an eccentric test of the insertion of the hamstrings muscles with hip flexion > 100 degrees, slightly flexed knee, and pain provocation when palpating the TI insertion of the hamstring muscles. The eccentric test was scored as positive if pain in TI was recognized as a symptom by the patient. The palpation test was also considered positive if t...

Background and Study Aim. Muscular strength balance are important components of athletic performance, the muscles around knee (Quadriceps Hamstrings) provide joint stability when is in motion. The aim this study was to analyze correlation between quadriceps/hamstring (H/Q) muscle strength, Hamstring/Quadriceps ratio performance. Material Methods. Ten male volunteers with an average age 21.60±2....

CONTEXT Coactivation ratio of quadriceps to hamstring muscles (Q:H) and medial to lateral knee muscles (M:L) contributes to the dynamic stability of the knee joint during movement patterns recommended during rehabilitation and important for daily function. OBJECTIVE To compare the quadriceps-to-hamstring and medial-to-lateral knee muscles' coactivation ratios between men and women during the ...