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.
What is a good average walking speed for fitness walking? The answer depends on a few factors, such as your age, fitness level, leg length, terrain (flat or hilly) and gender (research has shown that men move faster than women). In general, it is between 3.0 â 3.5 miles per hour which means you can walk one mile in 17 to 20 minutes. At this brisk pace, many people will enjoy the aerobic benefits, such as strengthened cardiovascular system, lower blood pressure, less anxiety and improved overall physical fitness.