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Notional core temperature responses to a fixed intensity protocol (filled circles/triangles) and isothermic HA protocol (open circles/triangles) performed during the morning (~08:00; circles) or evening (~18:00; triangles) on a cycle ergometer in 40°C and 40% RH. Change in temperature based upon an individual exercising at 1.3 W.kg−1 (fixed intensity) or 2.7 W.kg−1 (isothermic) from [95]. Resting morning and evening core temperature based upon data from [103].
