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John P post workout on one of the first really hot and humid days of the year

Heat acclimatization is an important consideration when in preparation for a race or sporting event. It's quite common for people (especially us Canadians) to be holiday racers. ie. going to Florida during the winter to do a marathon. Although the thought of moderate to hot temperatures and flat races in Florida sounds nice, you won't be fully performing to your maximum potential, with out a little extra preparation.

Heat acclimatization can take upto 2 wks. The rate at which certain bodily functions adapt are all different.
Cardiovascular function - the initial 1-5 days
Thermoregulatory adaptations (i.e., increased sweat rate, earlier onset of sweat production), coupled with cardiovascular adjustments, resul...

Lets start off with some facts:

The human body is about 60% water in adult males and 55% in adult females.
Lean muscle tissue contains about 75% water by weight.
Blood contains almost 70% water
Body fat contains 10% water
Bone has 22% water.
Skin also contains much water

1lb = 16oz/475ml of water

Normal sweat loss is equal to .6lbs/20 mins of exercise

Over a 1hr period you require 28.8oz/851ml to replenish yourself

Note: not all people sweat equally... a test that you can try in training is to hydrate well before your workout.
weigh yourself naked, and then weigh yourself post workout. After zero water added. A one hour long workout will give you better results than cutting it down to 20 mins. (if you are less efficient and need the water, drink a measured amount) take your weight before and after on a digital scale and now you have yo...

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