The sweat glands are activated when the body temperature begins to rise , which occurs during physical exercise. For example, the armpits produce up to 700 milligrams of sweat per hour during intense exercise, triple that of at rest at room temperature. If the exercise is carried out in water , the degree of sweating will be determined by the temperature of the water . If it is cool enough, the swimmer will sweat very little. Most of the heat generated will be lost through conduction and convection at the skin level. Now, if the water temperature is similar to the ambient temperature, exercise causes the sweat glands to activate and you sweat as much or more as when we cycle in full sun.
Do we sweat when we swim?
Japanese scientists create a 'washing machine for humans'
Can you imagine taking a relaxing bath in a machine that washes you with bubbles, plays relaxing music or videos?
Insect swarms generate as much electricity as a thunderstorm
Swarms of bees can generate an electrical charge of 1,000 volts per meter, a higher voltage density than thunderclouds and electrified dust storms.
This is what the Earth's magnetic field sounds like
The shield that protects our planet sounds 'pretty scary', according to ESA engineers.
Days were only 17 hours long 2.46 billion years ago
It was when the Moon was much closer to our planet. As the centuries pass, the Moon slowly recedes and the length of our day gradually lengthens accordingly.
Women are better at doing crosswords
A new study has revealed that women have a 'small but robust' advantage over time.