football

1. head injuries

1.1. concusions

1.2. Chronic traumatic encephalopathy

1.3. sleep disturbances

1.4. stress

2. broken bones

2.1. lose of muscle strengh

2.2. types of breaks

2.3. recovery time

3. muscles injuries

3.1. muscle never strong as it once was.

3.2. soreness/recovery time.

3.3. effects future career

3.3.1. military