thirty minutes he's already spent in the climate chamber is nowhere near his limit according to vitale martin off the fact that he started shivering is the body's normal response to cold and he could spend at least another half hour in the chamber but the doctors observing the test were adamant that he should not continue. no you don't feel anything at all if you would stand the cold apathy sets in and your brain switches off. i began to freeze almost immediately after ten minutes my feet were really cold i only had my slippers on. fifteen minutes later i began shivering badly and after twenty minutes i just wanted to lie down in the snow and do nothing. in this part of western siberia winter temperatures often reach minus thirty five degrees celsius. soldiers from russian army special units deployed here learning how to fight in the extreme cold. reconnaissance troops night may have to keep almost completely still for hours in the cold special uniforms helping to fend off hypothermia. boardroom we used various devices like a multi-layer uniform. the first layer is also working material to pr