Sauna-Induced Body Mass Loss in Young Sedentary Women and Men

Abstract

The aim of the study was to evaluate the relationship between body mass index (BMI) and body mass loss (BML) induced by thermal stress in a dry sauna. The study was conducted on a group of 674 sedentary students, 326 women and 348 men aged 19-20. The correlations between BMI scores and BML were determined. The subjects were placed in supine position in a dry sauna for two sessions of 10 minutes each with a 5-minute break. The influence of BMI on the amount of BML in the sauna was determined by nonlinear stepwise regression. The smallest BML was noted in underweight subjects; students with normal weight lost more weight, whereas the greatest BML was reported in overweight and obese subjects. Persons with a high BMI are at higher risk of dehydration, and they should pay particular attention to replenishing fluids during a visit to the sauna. The proposed equations for calculating BML based on a person's BMI can be useful in estimating the amount of fluids that should be replenished by both men and women during a visit to a dry sauna.

Association of High Cardiovascular Fitness and the Rate of Adaptation to Heat Stress

“…The physiological systems most impacted by sauna sessions are the skin and the thermoregulatory and cardiovascular systems [ 8 ]. Despite a normal strong response of the thermoregulatory system, involving an increased production of sweat, internal body temperature typically increases during a dry sauna.…”

The “Enseki” sandbath: A novel, safe and effective far‐infrared bathing procedure for health

“…The similar results were reported demonstrating that 0.48%-0.92% weight reduction was observed after dry sauna bathing (temperature 90°C, humidity 35%) for two sessions for 10 minutes each with a 5-minutes break. 18 Another group has investigated body weight changes pre-and postsauna bathing. 17 Although statistically significant weight reduction was seen upon sauna therapies in those studies, the weight reduction observed was only to lesser extent (averagely <0.5 kg).…”

Estimation of changes of lower limbs reactivity among mountain cyclist under the influence of sauna treatment - abstract

“…All called examples having an influence on control of nerves conduction and, the same on reactivity, find reference in results interpretation and probably this is why do not find any confirmation in publication in which the author says that under the higher body temperature activity of gamma motoneurons and skeletal muscles fibres activation decline. In consequence activity of alfa motoneurons is decreased what results in weaker muscle tension and skeletal muscle relaxation (Prystupa et al, 2009;Podstawski et al, 2015;Mero et al, 2015;Sawatari et al, 2015).…”