Objectives: Motor weakness is a notable symptom after stroke. Hence, the aim of this study was to find out the effect of bilateral quadriceps training compared to that of unilateral quadriceps training on balance, functional mobility and functional gait in patients with stroke. Subjects: Male and female hemiparetic patients between 40-60 years of age with post-stroke of 1-6 months were included...

BACKGROUND Quadriceps strength deficits are observed clinically after anterior cruciate ligament (ACL) injury and reconstruction and are often not overcome despite rehabilitation. Given that quadriceps strength may be important for achieving symmetrical joint biomechanics and promoting long-term joint health, determining the magnitude of strength deficits that lead to altered mechanics is criti...

Emerging evidences showed impaired muscle strength was prevalent in older adults with mild cognition impairment or dementia. However, little was known about the role of quadriceps strength in the cognition decline among older population. The objective of our study was to investigate the relation between quadriceps strength and cognitive performance. Using data from the National Health and Nutri...

BACKGROUND Quadriceps muscle dysfunction is well confirmed in chronic obstructive pulmonary disease (COPD) and reported to be related to a higher risk of mortality. Factors contributing to quadriceps dysfunction have been postulated, while not one alone could fully explain it and there are few reports on it in China. This study was aimed to investigate the severity of quadriceps dysfunction in ...

Quadriceps strength and activation deficits after anterior cruciate ligament (ACL) injury or surgery are typically evaluated at joint positions that are biomechanically advantageous to the quadriceps muscle. However, the effect of knee joint position and the associated changes in muscle length on strength and activation is currently unknown in this population. Here, we examined the effect of kn...

both vitamin d deficiency and quadriceps muscle weakness are associated with knee osteoarthritis (koa) and pain. the aim of this study was to determine the restorative effect of vitamin d deficiency on pain and quadriceps muscle strength in knee osteoarthritis. patients with koa aged≥30 years, the presence of knee pain for at least one month or longer and serum 25-hydroxyvitamin (25-ohd) defici...

Strength deficits of the musculature surrounding the knee can be significant after anterior cruciate ligament reconstruction (ACLr). In patients who have undergone ACLr, regaining quadriceps function is a core focus of therapeutic rehabilitation. Knee stability, which is dependent on neuromuscular control, including quadriceps strength, is necessary for normal coordination of the lower extremit...

Less than 50% of athletes pass criteria to return to sports (RTS) 6 months after ACL reconstruction (ACLR). Using data on 38 noncopers, we hypothesized that preoperative age, quadriceps strength index (QI), and knee flexion moments (KFM) during gait would predict the ability to pass/fail RTS criteria and that preoperative quadriceps strength gains would be predictive of passing RTS criteria. Ga...

BACKGROUND The objective of this study was to clarify the association of quadriceps muscle strength with knee pain using a large-scale, population-based cohort of the Research on Osteoarthritis/osteoporosis Against Disability (ROAD) study. METHODS From the 2566 subjects at the third visit of the ROAD study, the present study analyzed 2152 subjects who completed radiographic examinations and m...

The aim of this study was to describe the isokinetic thigh muscle strength profile of professional male football players in Australia. Concentric (60° and 240°·s(-1)) and eccentric (30° and 120°·s(-1)) hamstrings and quadriceps isokinetic strength was measured with a HUMAC NORM dynamometer. The primary variables were bilateral concentric and eccentric hamstring and quadriceps peak torque ratios...