Becker muscular dystrophy

**Long definition:** Becker muscular dystrophy is a myotonic disorder that involves slowly worsening muscle weakness of the legs and pelvis. Becker muscular dystrophy is very similar to Duchenne muscular dystrophy, although it gets worse at a much slower rate and it is less common. Becker muscular dystrophy occurs in about 3 to 6 out of every 100,000 births. The disease is found mostly in boys.

Symptoms include muscle weakness of the lower body, breathing problems, learning disabilities, fatigue and loss of balance and coordination.