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Table 2 Cardiac hemodynamic response to the 6-minute walk test

From: Cardiac hemodynamic response to the 6-minute walk test in young adults and the elderly

  Young Elderly P
Time Age Time × age
Stroke volume (ml)
 Rest 89.4 ± 22.1 68.9 ± 11.6 <0.001 0.001 0.17
 6 min 111.3 ± 27.3 102.9 ± 15.2
 Heart rate (beats/min)
 Rest 75.8 ± 12.0 77.3 ± 11.6 <0.001 0.56 0.82
 6 min 117.4 ± 26.7 121.0 ± 21.8
Cardiac output (l/min)
 Rest 6.6 ± 1.3 5.3 ± 1.1 <0.001 0.14 0.34
 6 min 12.7 ± 2.9 12.5 ± 2.9
Cardiac index (l/min/m2)
 Rest 4.0 ± 0.6 3.4 ± 0.6 <0.001 0.65 0.12
 6 min 7.6 ± 1.4 7.9 ± 1.7
  1. Values are expressed as mean ± standard deviation. P values in time are between rest and 6 min, and in age are between young and elderly subjects