Kidneys produce hormones. Normal kidneys also make important chemical messengers called hormones. These hormones circulate in the bloodstream and regulate some body functions such as blood pressure, the making of red blood cells, and the uptake of calcium from the intestine.
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A spinning class is an exercise class in which a group of people ride stationary bicycles. Spinning can give you a great cardiovascular workout, but also strengthen your heart and several muscle groups in your legs, backside and core.upporting Muscles. The gluteus maximus and medius, the muscles in the backside, push forward on the pedal at the top of the stroke in a spinning class. Strengthening these muscles can help you improve your muscular endurance. Try some of the same exercises that strengthen the quadriceps, such as lunges and squats.