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Table 1 Subject characteristics at baseline test and follow-up test

From: The ability of a submaximal cycle ergometer test to detect longitudinal changes in VO2max

  Baseline test Follow-up test n p-value *
Age (years) 42.8 (11.1) 48.4 (11.0) 35 < 0.001
Height (cm) 177.0 (10.5) 176.8 (10.4) 35 0.21
Body Mass (kg) 73.1 (12.3) 73.5 (12.3) 35 0.48
Measured VO2max (L/min) 3.65 (0.91) 3.64 (0.89) 35 0.91
Measured VO2max (mL/kg/min) 49.7 (8.2) 49.5 (8.4) 35 0.76
Estimated VO2max (L/min) 3.56 (0.93) 3.47 (0.91) 35 0.05
Estimated VO2max (mL/kg/min) 48.5 (9.0) 47.2 (8.9) 35 0.04
VO2 at standard work rate (L/min) 0.82 (0.11) 0.81 (0.18) 26a 0.84
HR at standard work rate (bpm) 82.4 (12.2) 81.9 (11.7) 35 0.62
Maximal HR (bpm) 184.8 (14.6) 181.0 (14.4) 34b < 0.001
ΔHR/ΔPO 0.41 (0.12) 0.39 (0.12) 35 0.08
  1. All values are presented as means with standard deviation (SD)
  2. VO2, Oxygen uptake; HR, heart rate; beats/min, beats per minute; ΔHR/ΔPO, change in heart rate/change in power output
  3. *p-value for difference between baseline test and follow-up test
  4. aMeasurements of VO2 at standard work rate was conducted in a subsample of the baseline tests, and the value was missing for nine of the re-recruited subjects in the present study
  5. bOne subject had a missing maximal HR registration due to technical difficulties with the heart rate monitor during the final stages of the maximal running test