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Table 3 6-min walk test, gait parameters and maximal muscle strength

From: Feasibility and safety of high-intensity interval training for the rehabilitation of geriatric inpatients (HIITERGY) a pilot randomized study

mITT population (n = 69)First visitLast visitMean difference$ (95% CI)Pvalue*
6-min walk test(N = 51)(N = 38)(N = 54) 
Distance213 ± 93257 ± 7923 (6 to 39)0.008
Predicted (%)59 ± 3976 ± 388 (2 to 14)0.007
Spatio-temporal gait parameters
Usual pace(N = 56)(N = 38)(N = 62) 
  Speed (cm/sec)56 ± 2262 ± 204.6 (−0.8 to 10.0)0.093
  Mean step length (cm)37 ± 1039 ± 102.2 (0.0 to 4.4)0.048
  Mean stride length (cm)74 ± 2177 ± 203.6 (−1.3 to 8.5)0.142
  Mean support base (cm)13 ± 414 ± 4− 0.1 (− 1.1 to 0.9)0.801
  Mean double support time (msec)5.8 ± 2.35.1 ± 1.5− 0.5 (− 0.9 to 0.0)0.053
Maximum pace(N = 57)(N = 39)(N = 61) 
  Speed (cm/sec)77 ± 3185 ± 298.5 (3.6 to 13.4)0.001
  Mean step length (cm)42 ± 1345 ± 132.9 (0.7 to 5.1)0.011
  Mean stride length (cm)85 ± 2691 ± 266.0 (1.6 to 10.3)0.008
  Mean support base (cm)13 ± 413 ± 4−0.7 (−1.6 to 0.2)0.105
  Mean double support time (msec)4.3 ± 2.13.8 ± 1.4−0.3 (− 0.6 to − 0.1)0.013
Gait variability parameters
Usual pace(N = 55)(N = 38)(N = 62) 
  CV step length13.2 ± 6.812.2 ± 6.1−0.7 (−3.0 to 1.5)0.503
  CV step time8.8 ± 7.47.6 ± 2.9−0.4 (−1.7 to 0.8)0.502
  CV stride length7.7 ± 4.07.5 ± 3.8− 0.1 (− 1.7 to 1.4)0.846
  CV stride time5.7 ± 5.44.7 ± 2.0−0.4 (− 1.3 to 0.5)0.361
Maximum pace(N = 57)(N = 39)(N = 61) 
  CV step length11.7 ± 7.511.6 ± 10.10.2 (−3.2 to 3.5)0.914
  CV step time8.5 ± 8.66.7 ± 2.9−0.3 (−1.2 to 0.7)0.590
  CV stride length6.7 ± 3.27.1 ± 5.50.4 (−1.2 to 2.0)0.613
  CV stride time4.7 ± 3.75.0 ± 4.90.5 (−1.0 to 2.0)0.504
Maximal muscle strength (kPa)(N = 46)(N = 35)(N = 50) 
 Handgrip33.3 ± 1529.7 ± 18.7−0.2 (−2.9 to 2.6)0.895
 Knee flexion12.5 ± 3.612.9 ± 4.20.4 (−1.0 to 1.8)0.564
 Knee extension14.8 ± 4.815.8 ± 5.00.8 (−1.1 to 2.8)0.392
 Ankle dorsiflexion19.2 ± 6.720.7 ± 7.41.4 (−1.1 to 3.8)0.254
 Ankle plantar flexion18.7 ± 8.018.2 ± 6.6−0.7 (−3.3 to 1.8)0.553
  1. $Mean difference (last visit – first visit) estimates and pvalues from linear mixed-effects models
  2. CV Coefficient of variation (dimensionless)
  3. Maximal muscle strength among both sides (kPa) assessed with a Vigorimeter® dynamometer