Increasing muscle strength is good, but increasing muscle power may be even better for enjoying a longer life, according to a recent study.
Soft tissue injuries in muscles, tendons and ligaments, and osteoarthritis, can make moving around painful and limit your physical activity.
Osteoarthritis is a disease that can cause serious discomfort in the joints, which affects 15% of the World population and costs more than 4,900 million each year.
Joints emit a variety of noises, including popping, snapping, catching, clicking, grinding, grating and clunking. The technical term for these noises is "crepitus", from the Latin "to rattle".