In ‘heat conservation mode’ what have the precapillary sphincter muscles done?

Precapillary sphincters are the type of smooth muscles that adjust the flow of blood through the capillaries. These are the muscles, which help to regulate the blood flow when required.

It helps in conservation of heat, as when the hypothalamus of the brain senses that the temperature of the body is too high it sends a signal to dilate the blood vessels, which leads to a reduction in the flow of blood to body tissues, As a result of that less heat is lost.

the design of a ski jumping suit involves a trade-off between giving the skiers lift to get higher jumps and ensuring the skier does not face a lot of drag before the jump itself. an expansive suit may to lift the skier higher, but at the same time, it will also increase the air resistance. higher air resistance as the skier goes down the slope limits the speed of the jump. a big suit also increases the risk of losing balance or control, especially if there's a strong gust of wind. while technologically enhanced suits a lot, clothing is not the only factor in a ski jumper’s success. gathering speed while skiing down the slope, ensuring good speed on the ramp, and maintaining good body posture and form in the air all contribute to a ski jumper's success.