Table 2 Effects of normoxia and hypoxia on performance, ventilatory and cardiac parameters from intermittent handgrip exercise

Task duration (s)

Tension-time index (N·min)

Baseline

Task failure

Baseline

Task failure

P_ETCO₂ (mmHg)

34.8 ± 5.9

34.7 ± 6.6

34.1 ± 4.6

33.2 ± 4.7

SpO₂ (%)

98.3 ± 1.4

98.7 ± 1.0

85.6 ± 4.5^a

88.5 ± 6.3^bc

V_E (L/min)

8.8 ± 3.7

11.7 ± 6.1

10.5 ± 3.3

15.0 ± 6.2^bc

HR (bpm)

76.0 ± 12.3

90.8 ± 12.7^a

86.7 ± 10.2^a

100.0 ± 12.7^bc

BP Systolic (mmHg)

121 ± 13

126 ± 10

123 ± 10

121 ± 14

BP Diastolic (mmHg)

69 ± 9

75 ± 7^a

72 ± 8

75 ± 8^c

Dyspnea (10-pt Borg)

0 ± 0

2 ± 2^a

0 ± 0

2 ± 1^c

Forearm fatigue (10-pt Borg)

0 ± 0

4 ± 2^a

0 ± 0

4 ± 2^c