Your arms are formed by the humerus, radius and ulna bones. The arms are used throughout the day for numerous daily activities, from cooking, getting dressed, reaching and connecting with others. Having strong arms is important for daily function.
Muscles of the arms include the biceps, triceps and forearm muscles. These muscles help push, pull, carry, lift, reach and support the body. It is important to maintain strong arms so that one does not lose the ability to perform many activities of daily living and to keep the bones in the upper extremity strong.
It is also worth noting that the arms are important for protecting the head during falls. When one falls, one reflexively extends the hands in front of them to protect their head from hitting the ground. This, while protective of the skull and brain, can cause injuries to the wrists, arms hands and shoulders.