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.
Regualr walking, like most aerobic activities, is good for you because cardio-vascular exercise strengthens the heart and lungs, increasing overall fitness. Together with diet and other exercise plans, it can also help with weight loss and tone up muscles. Dr Craig Williams a sports science lecturer at the University of Exeter is a firm believer in the benefits of walking, and says: 'It can improve muscle endurance as well as muscle strength, especially in the lower body.