On Earth all bodies have a weight, or downward force of gravity, proportional to their mass, which Earthâs mass exerts on them. Gravity is measured by the acceleration that it gives to freely falling objects. At Earthâs surface the acceleration of gravity is about 9.8 metres (32 feet) per second per second. Thus, for every second an object is in free fall, its speed increases by about 9.8 metres per second. At the surface of the Moon the acceleration of a freely falling body is about 1.6 metres per second per second.
Physicians and physiologists have warmed to the idea of water walking as therapy and good exercise for people with joint pain and damage for its many benefits, which include: 1  Waterâs buoyancy reduces the impact on joints.  Working out in water can help improve cardiovascular fitness, balance and range of motion.
Walking is the key to good cardio treadmill workouts. For the first four weeks, you should try for twenty minutes of walking at a pace of about 4-8 mph, depending on your comfort level. Adding ten minutes for the stretching, warm-up and cool-down, youâll spend a half-hour each time. For the next five weeks of treadmill exercise, add ten minutes to your walking time. Do this until you are spending a total of sixty minutes on the treadmill at a time. To keep it interesting, you can change the incline slightly but adjust your speed accordingly to stay in that target heart rate range.