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Table 3 Changes in outcome measures following 3 weeks of PR with whole body vibration (WBV) balance training or conventional balance training

From: Whole-body vibration training versus conventional balance training in patients with severe COPD—a randomized, controlled trial

  WBV balance training (n=24) p conventional balance training (n=24) p Between group difference p Effect size Cohen´s d
Balance tests
 Semi tandem stance/eyes closed, APL [mm] − 168 (− 265–71) <0.001 1 (− 100–102) 0.627 167 (32–305) 0.032 0.72
 Romberg stance/eyes closed, APL [mm] − 38 (− 80–4) 0.103 41 (− 19–101) 0.241 78 (7–150) 0.073 0.02
 One-leg stance/eyes open, APL [mm] − 150 (− 269–− 31) 0.005 2 (− 88–91) 0.744 152 (4–300) 0.017 0.68
Exercise performance tests
 6MWD, m 47.9 (28.2–67.5) <0.001 38.4 (24.6–52.2) <0.001 − 9.5 (− 33.0–14.0) 0.250 0.23
 Knee extension, peak force [N] 35.1 (16.6–53.6) 0.001 25.9 (15.3–36.4) <0.001 − 9.2 (− 29.4–10.9) 0.406 0.28
 Countermovement jump [W/kg] 2.3 (1.1–3.4) 0.001 − 0.1 (− 0.9–0.8) 0.879 − 2.3 (− 3.7–− 1.0) 0.001 1.02
 5-repetition sit-to-stand test [sec.] − 2.5 (− 3.7–− 1.2) 0.001 − 1.6 (− 3.0–− 0.2) 0.012 0.9 (− 0.9–2.8) 0.072 0.30
 1 min sit-to-stand test [rep] 3.6 (2.3–4.9) <0.001 2.7 (1.2–4.3) 0.004 − 0.9 (− 2.9–1.1) 0.740 0.26
 4 m gait speed test [m/s²] 0.08 (0.02–0.14) 0.018 0.01 (− 0.04–0.06) 0.715 − 0.07 (− 0.15–0.01) 0.107 0.56
  1. Values are presented as mean and 95% CI
  2. 6MWD 6 minute walk distance, APL absolute path length, BMI Body-Mass-Index