Table 3. Comparison of the PO (kPa) and PCO (kPa) values measured during the last minute of exercise, immediately following exercise, and during the third minute of recovery between the two different breathing conditions. parameter SB B10 PO2 last minute during the exercise 11.3 (0.6) 8.7 (1.2) ** immediately following the exercise 11.8 (1.4) 10.9 (0.9) during the 3. minute of the recovery 12.4 (1.0) 12.5 (1.2) PCO2 last minute during the exercise 5.2 (0.8) 7.3 (0.5) ** immediately following the exercise 5.1 (1.0) 5.9 (1.1) ** during the 3. minute of the recovery 5.0 (0.5) 5.1 (0.5) ** denote p ≤ 0.01 between the exercises in two different breathing conditions.