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Few investigators have considered the possibility that skeletal muscles might contain thermosensitive elements capable of modifying thermoeffector responses. In this experiment, the temporal relationships between dynamic changes in deep‐body and intramuscular temperatures and eccrine sweat secretion were explored during rhythmical and reproducible variations in heat production.

Eight subjects performed semi‐recumbent cycling (25 °C) at a constant load to first establish whole‐body thermal and sudomotor steady states (35 min), followed by a 24‐min block of sinusoidal workload variations (three, 8‐min periods) and then returning to steady‐state cycling (20 min). Individual oesophageal, mean skin and intramuscular (vastus lateralis) temperatures were independently cross‐correlated with simultaneously measured forehead sweat rates to evaluate the possible thermal modulation of …