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 Seat height: On an upright bike, start by adjusting your seat to about the height of your hip. Have a seat, placing your feet on/into the pedals. 2  With one leg fully extended (foot flat and parallel to the floor), you should have only a small bend in your kneeâabout 5-10 degrees. The first option, an upright bike, is like a regular bicycle (your legs extend below your torso and your back is not supported), only stationary. 2  Recumbent bikes offer a more relaxed, supported sitting position.