Like Duchenne Muscular Dystrophy (MD), Becker MD mostly affects boys. Becker MD also affects similar areas of the body to Duchenne MD, although the symptoms tend to be less severe.
Symptoms of Becker MD usually begin in childhood, but they're often relatively mild at this point. For example, a child with the condition may:
During late childhood or early adulthood, people with Becker MD often find they have difficulty running, walking quickly and climbing stairs. As they get older, they may also find lifting objects above waist height difficult.
A person with Becker MD will often eventually need a wheelchair by the time they're 40-50 years old, although this is highly variable. For example, one person with Becker MD may be unable to walk by the time they're 16, while another person with the condition may be able to walk until they're 80.
If you have Becker MD, you're also at risk of developing dilated cardiomyopathy and breathing problems. However, Becker MD progresses at a slower rate than Duchenne MD, and those with the condition often have a normal lifespan.