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Table 1 Measured variables in 30 min FIRS bathing and in 30 min traditional (TRAD) sauna bathing (mean ± SD)

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

Variable Before sauna 15 min in sauna After sauna Recovery 30 min
Body mass (kg)a
 FIRS 79.7 ± 7.1   79.4 ± 7.5  
 TRAD 80.6 ± 8.6   80.1 ± 8.6  
Hemoglobin (g/l)
 FIRS 159 ± 10 157 ± 10 157 ± 9 156 ± 9
 TRAD 158 ± 8 160 ± 8 160 ± 9 159 ± 8
Heart rate (beats/min)
 FIRS 70 ± 9 72 ± 9 71 ± 7 64 ± 7
 TRAD 71 ± 8 81 ± 10 92 ± 13c 68 ± 9
Blood pressure (mm Hg)
 FIRS systolic 138 ± 13 127 ± 14 129 ± 11 129 ± 12
 FIRS diastolic 83 ± 15 73 ± 13 77 ± 11 78 ± 10
 TRAD systolic 133 ± 13 129 ± 14 133 ± 11 127 ± 12
 TRAD diastolic 76 ± 15 74 ± 13 75 ± 11 82 ± 10
pH
 FIRS 7.40 ± 0.03 7.42 ± 0.02 7.42 ± 0.02 7.40 ± 0.02
 TRAD 7.41 ± 0.02 7.43 ± 0.02 7.43 ± 0.03 7.42 ± 0.02
Testosterone (nmol/l)
 FIRS 18.8 ± 4.7 18.3 ± 5.3 17.9 ± 5.1 18.9 ± 6.3
 TRAD 20.0 ± 5.3 18.7 ± 3.5 21.0 ± 5.6 19.8 ± 5.5
Cortisol (nmol/l)
 FIRS 399 ± 88 367 ± 122 354 ± 133 329 ± 109b
 TRAD 546 ± 122 467 ± 143b 409 ± 117b 380 ± 127b
Growth hormone (µg/l)
 FIRS 0.7 ± 1.3 5.2 ± 12.6 5.4 ± 5.1b 11.2 ± 8.0b
 TRAD 0.6 ± 0.6 6.9 ± 8.7 19.4 ± 26.1b 11.9 ± 20.0b
  1. aSubjects drank 0.5 dl water in sauna which is included in body mass.
  2. bSignificantly (p < 0.05) different from before value.
  3. cSignificantly (p < 0.05) different from FIRS after sauna value.