Table 3

Results of meta-analyses for interval versus continuous exercise training

OutcomeInterval (95% CI)Continuous (95% CI)WMD (95% CI)No. of participants in interval:continuous (studies)
IET: VO2peak (l/min)0.80 (−0.01 to 0.16)0.12 (0.03 to 0.20)−0.04 (−0.13 to 0.05)102:112 (6)
IET: lactate threshold (l/min)0.10 (0.03 to 0.17)0.09 (0.04 to 0.13)0.01 (−0.05 to 0.07)63:63 (4)
IET: peak work rate (Watts)11 (9 to 13)10 (8 to 11)1 (−1 to 3)163:174 (8)
IET isotime: VE (l/min)−3 (−7 to 1)−2 (−7 to 2)−1 (−5 to 3)65:70 (4)
IET isotime: dyspnoea (Borg 1–10)−1.6 (−2.5 to −0.7)−1.3 (−2.5 to 0)−0.30 (−1.02 to 0.41)73:81 (4)
IET isotime: breathing frequency (breaths/min)−3 (−5 to −2)−3 (−5 to −1)0 (−2 to 2)73:81 (4)
IET isotime: heart rate (beats/min)−8 (−13 to −3)−9 (−15 to −3)2 (−3 to 7)93:82 (5)
Endurance exercise isotime: VE (ml/min)−3 (−6 to −1)−2 (−5 to 2)−2 (−6 to 1)48:53 (2)
6MWT: distance (metres)48 (29 to 68)42 (25 to 59)4 (−14 to 23)110:118 (4)
CRQ: dyspnoea1.0 (0.6 to 1.4)1.2 (0.7 to 1.7)−0.2 (−0.5 to 0.0)106:112 (4)
CRQ: total0.7 (0.5 to 1.0)0.8 (0.6 to 1.1)−0.1 (−0.3 to 0.2)79:83 (3)
HAD: anxiety−2.0 (−2.9 to −1.1)−2.2 (−3.3 to −1.2)0.3 (−0.8 to 1.3)68:73 (2)
HAD: depression−1.9 (−2.9 to −0.9)−2.2 (−3.7 to −0.8)0.5 (−0.5 to 1.5)72:76 (2)
  • CRQ, Chronic Respiratory Questionnaire; HAD, Hospital Anxiety and Depression scale; IET, incremental exercise test; 6MWT, 6 minute walk test; VE, minute ventilation; VO2peak, peak oxygen uptake; WMD, weighted mean difference.