Abstract
AbstractBackground:Methodological discrepancies between studies have made it difficult to conclude whether heat exposure does or does not adversely affect cognitive function and under what specific environmental and physiological conditions these alterations appear.Purpose:To investigate what triggers cognitive and neuromuscular alterations during passive heat exposure.Methods: Eight volunteers performed simple (OTS-4) and complex (OTS-6) cognitive tasks as well as neuromuscular testing (maximal isometric voluntary contractions of the thumb with electrical stimulation of the motor nerve and magnetic stimulation of the motor cortex). These tests were performed at the start (T1), after 1h30 (T2), 3h (T3) and 4h30 (T4) of exposure in both hot (HOT, WBGT = 38 ±1.4°C) and neutral (CON, WBGT = 19 ±0.3°C) environments. Environmental temperatures were adjusted during the HOT session to induce target core temperatures (Tcore) (T1 ∼37.3; T2 ∼37.8; T3 ∼38.3; T4 ∼38.8oC).Results:There were global effects of time (p <...
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