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.
If you just want to keep healthy then 30 minutes of walking per day is fine but if you want to lose weight you are going to need to try and do 60 minutes per day of a strenuous exercise like swimming, biking or running.ear your walkman, keep your head down and stay focused and you can get a great workout in a short amount of time. Cardio time is separate and how long you should do cardio depends on if you are trying to lose weight or are doing it for just general cardiovascular health.