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Original Article

Sweating and thirst perception in premenopausal, perimenopausal and postmenopausal women during moderate exercise

Emmanuel Amabebe, Sonia I. Omorodion, Janet O. Ozoene, Andrew C. Ugwu, Leonard F. Obika.

Cited by (2)

Objective: We examined the sweat rate (SR), sweat volume (SV), sweat sodium concentration (S[Na+]) and changes in thirst perception (TP), in premenopausal (preM), perimenopausal (periM) and postmenopausal (postM) women after moderate exercise.
Methods: Thirty healthy women comprising preM (22.5 0.8 yrs, n = 10), periM (46.5 1.1 yrs, n = 10) and postM (52.2 0.9 yrs, n = 10) participated in the study. All participants gave informed consent. TP was rated using the visual analogue scale. Sweat was obtained with sweat suction apparatus from a 120 cm2 circular area marked on the skin of the face and neck, after moderate exercise, i.e. a 15 min walk on the treadmill at a speed of 4.2 km/h at 27C. The start time was noted, SR, SV and S[Na+] were determined.
Results: Exercise induced a significant change in TP in all groups, of which the postM women exhibited the lowest thirst ratings. Although there was no significant difference in SV and S[Na+] between the groups, the periM women showed a significantly higher SR compared to both preM and postM groups. A significant and positive correlation existed between TP, SR, SV and S[Na+] values.
Conclusion: These data indicate that an increase in sweat rate and volume produces a concomitant increase in thirst perception in women during moderate exercise, but sodium loss is reduced.

Key words: Exercise; Menopause; Sweating; Thirst perception

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