The impact of short term heat acclimation program on muscle and nerve functions

Research problem: Humans physical capacity to work decreases faster under heat stress. The aim of the research - to determine whether short-term 14 days induced heat acclimation will affect the functional capacity of the neuro-muscular system and physiological indicators of the body. Tasks of the work: 1. Assess the effects of the short-term 14d. heat acclimation programme on nerve functions; 2. Assess the effects of the short-term 14d. heat acclimation programme on muscle functions; 3. Assess whether the short-term 14d. heat acclimation programme has led to an adaptation. Study hypothesis: 1. 14-days heat acclimation protocol will lead to adaptations i.e. reduce physiological stress during heat. 2. Reduced physiological stress will improve central activation, which will improve neuro-muscle reflexes. Research methods: Anthropometry, body temperature measurements (rectal and skin), subjective sensations, force assessment, reflex evaluation, body heating, heart rate measurement. Results: After acclimation rectal temperature of the subjects decreased significantly during resting. After a protocol for heat acclimation in hyperthermia, central activation remained impaired, leading to a deterioration in neuro-muscular function as well. Changes in muscle fatigue have not changed significantly with hyperthermia. Conclusion: The subjects gained only part of the adaptations. The protocol of acclimation to heat did not improve central activation and did not reduce muscle fatigue in hyperthermia