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Table 3 Measured variables in ETS and FIRS bathing 30 min or in ETS and sitting in a normal room (NO SAUNA) 30 min and in both cases during recovery sitting another 30 min (mean ± SD)

From: Effects of far-infrared sauna bathing on recovery from strength and endurance training sessions in men

Variable Before ETS After ETS Recovery 30 min Recovery 60 min
VO2 (ml/kg/min)
 FIRS 5.7 ± 0.9 62.7 ± 4.2a 5.3 ± 0.8 4.9 ± 0.6
 NO SAUNA 5.7 ± 0.7 62.9 ± 3.5a 5.4 ± 0.9 5.0 ± 0.6
Heart rate (beats/min)
 FIRS 75 ± 9 201 ± 11a 99 ± 9 80 ± 11
 NO SAUNA 75 ± 10 200 ± 10a 93 ± 11 79 ± 14
Blood pressure (mm Hg)
 FIRS systolic 139 ± 12 168 ± 20b 114 ± 11 121 ± 8
 FIRS diastolic 80 ± 10 80 ± 12 73 ± 10 72 ± 6
 NO SAUNA systolic 138 ± 12 182 ± 17b 125 ± 12 126 ± 8
 NO SAUNA diastolic 78 ± 10 86 ± 17 74 ± 10 75 ± 6
pH
 FIRS 7.40 ± 0.0 7.30 ± 0.04a 7.40 ± 0.02 7.40 ± 0.02
 NO SAUNA 7.41 ± 0.02 7.29 ± 0.04a 7.40 ± 0.03 7.41 ± 0.02
Lactate (mmol/l)
 FIRS 2.0 ± 1.0 12.0 ± 2.7a 4.4 ± 2.3 2.1 ± 0.4
 NO SAUNA 1.8 ± 0.6 12.9 ± 4.1a 4.4 ± 2.1 2.3 ± 0.8
Testosterone (nmol/l)
 FIRS 18.8 ± 3.9 23.6 ± 5.1 20.6 ± 5.1 20.4 ± 5.5
 NO SAUNA 18.5 ± 4.4 23.5 ± 6.4 19.5 ± 6.7 18.0 ± 4.7
Cortisol (nmol/l)
 FIRS 531 ± 151 640 ± 132 601 ± 121 491 ± 132
 NO SAUNA 519 ± 117 639 ± 112 616 ± 196 609 ± 211
Growth hormone (µg/l)
 FIRS 2.2 ± .0.9 65.5 ± 41.6a 26.6 ± 11.2b 7.5 ± 8.0
 NO SAUNA 1.5 ± 3.8 57.5 ± 39.9a 23.5 ± 16.3b 7.6 ± 8.8
Body mass (kg)
 FIRS 79.8 ± 7.6 79.4 ± 7.4 78.9 ± 7.4c 78.9 ± 7.4c
 NO SAUNA 79.6 ± 7.6 79.1 ± 7.5 78.9 ± 7.5 78.9 ± 7.4
CMJ (m)
 FIRS 0.37 ± 0.08 0.32 ± 0.10 0.34 ± 0.09d
 NO SAUNA 0.37 ± 0.08 0.32 ± 0.09 0.32 ± 0.08
  1. aSignificantly (p < 0.001) different from before value.
  2. bSignificantly (p < 0.05) different from before value.
  3. cSubjects drank 0.5 dl water in sauna which is included in body mass.
  4. dSignificantly (p < 0.05) different from NO SAUNA value.