Table 2 Peak exercise responses before and after training in patients with COPD (n = 15)
Before trainingAfter training
Work rate (W)50 (6)55 (6)*
V̇o2 (ml/kg/min)12.1 (1.1)13.3 (1.4)*
LT (ml/kg/min)8.5 (0.6)10.7 (2.4)*
V̇e (l/min)35.9 (3.2)37.1 (3.1)*
fb (breaths/min)31 (2)34 (2)*
Vt (l)1.15 (0.08)1.16 (0.09)
Spo2 (%)93 (1)90 (1)
RER0.98 (0.04)0.99 (0.04)
Dyspnoea (Borg)3.8 (0.4)4.4 (0.4)
Leg fatigue (Borg)3.9 (0.4)3.6 (0.5)

  • Values are mean (SE).

  • WR, work rate; V̇o2, oxygen uptake; LT, lactate threshold; V̇e, minute ventilation; fb, breathing frequency; Vt, tidal volume; Spo2%, percentage arterial oxygen saturation; RER, respiratory exchange ratio.

  • *p<0.05 vs before training (paired t test).