Tom Andrews asked...
I recently did a fitness test at my gym.
I recently did a fitness test at my gym and they advised I was not drinking enough water.
The amount of water your body needs per day rather depends on how much water your body uses on that day. The body loses more water from sweating in hot temperatures, exercising, and during illnesses. The average amount needed for a man is roughly 3 litres and 2 litres for a women. All fluids do contain water, so drinks such as tea and juices are alternatives to plain water. Many foods also contain some water too. If you drink enough so that you are not often thirsty and your urine is pale yellow, then you are probably drinking enough. A test done at the gym is not a very accurate assessment of measuring bodily fluids.