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.
Rest until there is no pain. This may be a few days for a mild injury or two or three weeks for a more severe strain. If it is possible to use an exercise bike pain free then do so but if it hurts then wait. Medication. A doctor may prescribe anti-inflammatory medication such as ibuprofen to reduce pain and swelling.