When you hop, run or jump, your legs behave like springs, absorbing and returning energy with each step. But what happens to your muscles and tendons to make this possible? Associate Professor Daisuke ...

Researchers at the University of Tokyo reveal the way our legs adapt to fast movements. When people hop at high speeds, key muscle fibers in the calf shorten rather than lengthen as forces increase, ...

Hamstrings can become tight for several reasons, including sitting for long hours, not stretching regularly, exercising ...

Physiotherapist Helen O'Leary performing a wide leg side-to-side. Spending large chunks of your day sitting down can cause your hip flexor muscles to weaken and tighten. This can result in stiff hips, ...

Resistance, or weight training, is widely recommended in sports and rehabilitation as an effective exercise to increase muscular strength and size. This form of exercise involves applying resistance ...

The case description for a Case Records of the Massachusetts General Hospital appears below. A 30-year-old woman was evaluated because of back pain, leg stiffness, and falling. Tone was increased in ...

Almost everyone has experienced it at some point—a sudden, painful tightening of the calf muscles - Leg Cramps that jolts you ...

Spastic diplegia cerebral palsy (SDCP) is a form of cerebral palsy that causes muscle stiffness and spasms in a person’s legs and, sometimes, arms. This is due to damage to the motor cortex of the ...