Muscle contraction is the tightening, shortening, or lengthening of muscles when you do some activity. It can happen when you hold or pick up something, or when you stretch or exercise with weights.

Tone up after 50 in 30 days with 5 daily exercises: kettlebell swings, incline presses, lunges, rows, and bicycle crunches.

Myotonic dystrophy is a condition that causes thinned muscles, decreased muscle tone, and muscle weakness. Over time, a person may lose their strength and have issues relaxing their muscles. The ...

The word “toning” is something of a joke in many fitness circles, because it’s a word that’s thrown around when people mean other things. Sometimes it’s a code word for being thin, as when somebody ...

Restore muscle tone and balance with 5 standing exercises that fire your whole body and feel easier on joints after 65.

Skeletal muscle is the type of muscle that controls movement. Problems with these muscles can be minor, life-threatening, or ongoing problems that make it hard to perform basic daily activities.

There are two classes of muscle relaxers. Antispasmodics reduce spasms by inhibiting signals in the brain, while antispastics affect the spinal cord and reduce muscle tightness and spasms. While ...

Though rare, cerebral palsy can sometimes cause hypotonic symptoms, or chronic muscle weakness. Treatments such as physical therapy or surgery can help improve mobility. Cerebral palsy is a physical ...

Gelastic cataplexy is a sudden loss of muscle tone without loss of consciousness triggered by laughter. It’s a characteristic sign of a rare genetic disease called Niemann Pick disease type C.

Medically reviewed by Mallory Christopherson DC, FMT, CSCS Body types influence metabolism, weight gain and loss abilities, and health risks.The three main body types are endomorph, mesomorph, and ...