Scientific studies* show that when the core tendon temperature goes above 42.5°C degeneration of the tendon cells can occur.
Skin temperatures are thought to be 5-6 degrees lower than the core of the tendon. This could mean that the skin temperature only has to rise to 37 °C for the core temperatures to be within this damaging range.
Wearing boots and bandages is proven to insulate the legs. In our tests, skin temperatures inside the boots reached 38°C. This may mean core temperatures of over 43°C. Applying ice cold Cryochaps is a great way to reduce internal temperatures as quickly as possible after riding.
*Birch et Al 1997