Sleep patterns change. Insomnia is more common in females, but becomes prevalent in both males and females in the later years. As a result, there is a decrease in overall strength and energy, increase in stiff joints, increase in time to recuperate after hard work and a decrease in reflexes. These changes make driving a car more difficult. Problems with a sense of balance tend to increase the risk of falls and makes it more difficult to reorient yourself if you get turned around in direction.
Arthritis is inflammation of a joint.
There are over 100 different kinds but there are three or four common types. There is no cure. Rest, physical therapy, moist heat and anti-inflammatory drugs seem to help. Females are afflicted more often than men. Tendons become twisted, shortened, displaced or fused.