The concrete operational stage is the third stage of Piaget's theory of cognitive development. This stage, which follows the preoperational stage, occurs between the ages of 7 and 11 (preadolescence) years, and is characterized by the appropriate use of logic.
Bicycle riding can relieve the pain and inflammation of osteoarthritis. Osteoarthritis is a degenerative form of arthritis that results from wear and tear to the knee joint and knee cartilage over time. Your knees, hips, shoulders and hands are most susceptible to osteoarthritis damage. If you experience osteoarthritis, you can engage in low-impact exercises like bicycle riding. There are many types of bicycle riding, however, and some may be better than others for arthritis treatment.
1 Make sure that you are able to cycle for 30mins at a light resistance on a stationary bike without getting any knee problems before you switch to a normal bike. 2  Hills put more stress on the knee joint so start off on a flat route. If in doubt get a qualified bicycle mechanic to check your bike before you ride. 2  Make sure that you are able to cycle for 30mins at a light resistance on a stationary bike without getting any knee problems before you switch to a normal bike.