'When you heat train, you produce more blood': why sweaty sessions indoors can be as effective as altitude training
As temperatures soar across Europe, we find out how riders prime themselves for the heat by deliberately raising their core temperature indoors
Heat training has become an integral part of a cyclist's regimen, particularly in recent years as the Tour de France has set new temperature records. Riders endure hour-long indoor sessions in winter clothing to simulate the heat and stress their bodies, ultimately improving performance in hot conditions. This approach is beneficial for both professional and amateur cyclists, as it promotes a greater production of red blood cells, enhancing endurance.
Scientists have found that heat training increases blood plasma volume, diluting the blood and triggering the production of more red blood cells – a process comparable to EPO or altitude training. While the practice may seem extreme, cyclists report feeling better prepared for races after incorporating heat training into their routines, as it provides the same physiological benefits as altitude training but can be done at home.
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