The Facts About Sweat
to sweat -- literally.
Sweating is your body's most effective way of cooling itself because when
sweat evaporates from your skin, body heat is reduced.
is important, if you don't replace the fluids you lose through sweat, it can
lead to dehydration and heat illness. That's why fluid replacement before,
during and after exercise and activity is so crucial.
When We Sweat
the heat produced by working muscles exceeds the heat released by the body,
and body temperature rises. The rise in body temperature causes an increase
in sweating and blood flow to the skin. As a result heat is removed by the
evaporation of sweat from the skin, radiated from the body to the cooler surroundings,
and is lost by convection to moving air.
Our bodies are
approximately 55-65% fluid. When some of that fluid is lost through sweat,
it affects our cardiovascular system and our ability to control temperature.
Influence Sweat Rates
- Environment - High temperatures
cause you to sweat more quickly and to lose more fluids through sweat. Humidity
also affects your ability to cool off. It's harder for sweat to evaporate
in hot, humid weather than in hot, dry weather heat index chart.
- Exercise intensity - As
your body works harder, body temperature increases, which leads to greater
- Clothing and equipment
- Minimal, loose-fitting clothing helps promote heat loss. Heavy clothing
and equipment (e.g., football uniform and helmet) doesn't allow heat to
be released as easily and increases sweating.
- Genetics - Heredity has
some effect on your ability to sweat, but being in good physical condition
is usually a more important factor.
- Fitness and acclimatization
- As you increase your fitness, you become a better "sweater." You sweat
sooner and you sweat more. The body adapts to exercise in warmer temperatures
by sweating more.
has approximately 2 - 4 million sweat glands weighing a total of approximately
100 grams (about 3 ounces).
concentrated area of sweat glands is on the bottom of our feet while the
least concentrated area of sweat glands is on our back.
more sweat glands than men, but men's are more active.