Table 5

Mean changes in exercise test variables from baseline to follow-up after 14 weeks CR (n=416)

Exercise test characteristicsLow sCRF† (n=76)Moderate sCRF (n=196)Higher sCRF‡ (n=146)p Value
Change in METs1.36 (1.07 to 1.64)0.99 (0.85 to 1.13)0.31 (0.12 to 0.50)<0.0005
Change in exercise time (min)2.4 (1.9 to 3.0)1.6 (1.4 to 1.8)0.5 (0.2 to 0.8)<0.0005
Change in power output (W)38 (26 to 53)20 (11 to 26)10 (0.7 to 20)0.122
Change in peak HR (bpm)−1 (−1 to 0)1 (1 to 1)0 (0 to 0)0.761
Change in peak HR (β-blocked)5 (5 to 6)4 (4 to 4)4 (3 to 4)0.786
  • †Entry sCRF level <6 METs (men) and <5 METs (women) at CR entry.

  • ‡Entry sCRF level ≥8 METs (men) and ≥7 METs (women) at CR entry.

  • bpm, beats per minute; CR, cardiac rehabilitation; sCRF, submaximal cardiorespiratory fitness; METs, metabolic equivalents; W, Watts.