Abstract
Sauna baths acutely increases vasodilation, heart rate (HR) and muscle relaxation; therefore sessions of sauna have been tested as a therapeutic treatment for cardiovascular diseases and psychological diseases. When combined with exercise, sauna baths have been performed to accelerate exercise recovery, with the sauna being done post workout the majority of times. The aim of this study was to determine the effects of the sauna used prior to a bout of moderate intensity aerobic exercise. Eight volunteer performed a 20-minute treadmill aerobic exercise (running) 70% of maximal VO2 with and without a visit to the sauna. Systolic and diastolic blood pressure (BP), HR, and Rate of Perceived Exertion (RPE) were recorded before, halfway at 10 minutes, and after the aerobic exercise. Systolic BP, assessed before exercise, was not different when subjects performed prior sauna (124.8 ± 10.8 vs. 125± 11 mm/Hg no sauna and sauna, respectively). However, diastolic BP was lower in no-sauna condition vs. sauna condition while HR and RPE (73± 5 vs 80± 4.5 mm/Hg BP, 90±13 vs. 101±11 beats/min and 6 vs. 7 RPE no sauna and sauna, respectively). When the comparison was made within the experimental condition exercise, sauna attenuated the increase in systolic and diastolic BP induced by exercise without affecting HR and RPE. Extreme high temperatures experienced in sauna modulate cardiovascular system responses by increasing HR and diastolic blood pressure. Moderate exercise increases systolic and diastolic BP, which might be attenuated when sauna is performed prior to exercise. A Sauna session might be used to modulate the response of exercise towards BP.
Highlights
People have used saunas in beauty spas and fitness centers mainly for stress relief, weight loss and enhancing detoxification (SUTKOWY et al, 2014; SUDAKOV; SINITCHKIN; KHASANOV, 1988)
Diastolic blood pressure (BP) was lower in no-sauna condition vs. sauna condition (73± 5 vs 80± 4.5 mm/Hg, Figure 1B)
Diastolic BP and the mean between systolic and diastolic BP, which increased during exercise when sauna was not performed, was unchanged when sauna was done before exercise (Figure 1B and 1C)
Summary
People have used saunas in beauty spas and fitness centers mainly for stress relief, weight loss and enhancing detoxification (SUTKOWY et al, 2014; SUDAKOV; SINITCHKIN; KHASANOV, 1988). As a result of the extremely high temperature of the sauna, around 70°C, the body sweats, blood circulation and heart rate (HR) increases (SUTKOWY et al, 2014; SUDAKOV; SINITCHKIN; KHASANOV, 1988; PILCH et al, 2014). Several outcomes of sauna are very similar to aerobic exercise, which attracted the attention of scientists in different fields (SUTKOWY et al, 2014; PODSTAWSKI et al, 2015; HUSSAIN; COHEN, 2018). There is extensive evidence that sauna baths acutely increase the endurance of the cardiorespiratory and locomotor systems, promote vasodilation and muscle relaxation, in addition to promoting psychological effects (PODSTAWSKI et al, 2015; HUSSAIN; COHEN, 2018). Sauna baths have been performed to accelerate exercise recovery, with the sauna being done post workout the majority of times (PAOLONE et al, 1980; SHARMAN; STOWASSER, 2009)
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