Effects of forearm muscle metaboreceptors activation on sweating and cutaneous vascular responses during passive heating and cycle exercising in humans

Tatsuro Amano,Takeshi Nishiyasu,Yoshimitsu Inoue,Narihiko Kondo,Glen P Kenny

doi:10.1186/2046-7648-4-s1-a99

Abstract

Muscle metaboreceptors are afferent signals from working muscles that enhance sweating and attenuate cutaneous vasodilation during a passive heat stress in humans [1]. However, it remains unclear if metaboreceptor activation during an exercise-induced heat stress may have comparable effects on heat loss responses. This study investigates the influence of forearm muscle metaboreceptors activation on the core temperature onset thresholds and thermosensitivity (slopes) of the sweating and cutaneous vascular responses during a passive (study Ι) and exercise (study ΙΙ) induced heat stresses associated with the different modification of the responses between heating conditions [1].

Highlights

Muscle metaboreceptors are afferent signals from working muscles that enhance sweating and attenuate cutaneous vasodilation during a passive heat stress in humans [1]
Study Ι: Fourteen (8 females, 6 males) young adults were passively heated for 15.5 min using a upper body water perfused suit (34 °C) and immersing the participant’s legs in hot water (43 °C)
Study Ι: Forearm muscle metaboreceptors stimulation significantly lowered Δmean body temperature thresholds for sweating and cutaneous vasodilation on the oppositional arm of hand-grip exercise during passive heating compared with Control (P

Summary

Introduction

Muscle metaboreceptors are afferent signals from working muscles that enhance sweating and attenuate cutaneous vasodilation during a passive heat stress in humans [1]. It remains unclear if metaboreceptor activation during an exercise-induced heat stress may have comparable effects on heat loss responses. This study investigates the influence of forearm muscle metaboreceptors activation on the core temperature onset thresholds and thermosensitivity (slopes) of the sweating and cutaneous vascular responses during a passive (study Ι) and exercise (study ΙΙ) induced heat stresses associated with the different modification of the responses between heating conditions [1]

Methods

Results

Discussion

Conclusion