TABLE 5

Physiological responses to the 1-min sit-to-stand (STS) test, five-repetition STS test and 6-min walk test (6MWT) at rest, during exercise and recovery

Rest#ExerciseRecovery#
1-min STS test5STS test6MWT1-min STS test5STS test6MWT1-min STS test5STS test6MWT
Subjects21211521211520§2112ƒ
Test score 18.9±5.410.1±4.4376.1±89.4 
VO2 mL·kg−1·min−14.7 ±0.94.5±1.14.8±1.312.3±3.85.7±2.212.3±2.15.2±1.44.5±1.24.3±1.1
VCO2 mL·kg−1·min−14.1±0.83.7±0.94.0±1.310.5±3.14.7±2.110.6±2.55.4±1.53.8±1.14.0±1.0
RER0.86±0.050.83±0.060.83±0.100.85±0.080.81±0.090.85±0.091.03±0.070.84±0.060.96±0.06
VE L·min−114.4±2.913.3±2.714.8±2.032.0±9.418.8±5.833.6±10.318.2±4.014.0±4.115.2±2.9
VT L0.85±0.270.91±0.360.92±0.291.23±0.390.73±0.391.27±0.321.09±0.370.85±0.301.04±0.36
fR breaths·min−118.2±5.216.3±4.817.1±3.527.2±7.930.3±10.127.6±8.017.9±4.517.6±4.615.8±4.1
HR beats·min−187.8±8.088.2±10.383.5±10.2107.0±10.997.1±9.8107.3±14.888.7±8.887.0±9.288.7±10.7
SpO2 %92.8±7.792.5±3.092.7±2.890.1±3.491.7±2.585.8±6.394.4±2.092.6±2.594.0±3.0
Borg dyspnoea+1.2±1.11.2±1.10.8±0.94·4±2.22.4±1.84.7±2.3
Borg leg fatigue+1.2±1.31.0±1.00.7±0.83.7±1.72.1±1.72.8±1.8
  • Data are presented as n or mean±sd. VO2: oxygen consumption; VCO2: carbon dioxide output; RER: respiratory exchange ratio; VE: minute ventilation; VT: tidal volume; fR: respiratory frequency; HR: heart rate; SpO2: oxygen saturation. #: rest 3 min, recovery 5 min; : 1-min STS test: repetitions, 5STS test: seconds, 6MWT: metres; +: Borg scales performed immediately pre- and post-test; §: one patient removed facemask immediately after test due to breathlessness; ƒ: two patients removed facemask during recovery due to breathlessness; one patient was stopped due to SpO2 of 70%.