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Table 4 Change in functional performance.

From: The feasibility of whole body vibration in institutionalised elderly persons and its influence on muscle performance, balance and mobility: a randomised controlled trial [ISRCTN62535013]

Parameter WBV+ (N = 10) Control (N = 11) pc pd pe
  Baseline 6 weeks pa pb Baseline 6 weeks pa    
Chair sit-and-reach (cm) -21.0 ± 6.9 -18.1 ± 8.0 .031 .506 -23.2 ± 9.4 -19.9 ± 9.7 .113 1 .817 .486
Back scratch (cm) -23.0 ± 18.3 -21.2 ± 18.4 .291 .989 -15.9 ± 6.9 -17.6 ± 8.2 .424 .178 .173 .618
30-second chair stand (number) 7.0 ± 4.1 8.8 ± 5.4 .062 .252 8.2 ± 3.1 8.3 ± 4.0 .844 .188 .200 .637
Tinetti test           
   Body Balance (score/16) 13.4 ± 3.1 13.9 ± 2.5 .250 .938 13.2 ± 2.6 11.8 ± 3.1 .008 .001 .001 .031
   Gait (score/12) 9.9 ± 2.8 9.5 ± 3.1 .125 .031 9.9 ± 2.1 9.5 ± 2.3 .063 1 .680 .700
   Total (score/28) 23.3 ± 5.6 23.4 ± 5.5 1 .516 23.1 ± 4.3 21.3 ± 4.9 .004 .002 .001 .048
Timed get-up & go (seconds) 15.3 ± 5.5 12.0 ± 3.7 .008 .113 14.8 ± 6.3 14.3 ± 7.1 .492 .029 .075 .238
Grip strength (KPa) 43.3 ± 18.9 44.6 ± 20.8 .367 .904 43.3 ± 24.6 45.6 ± 25.4 .102 .973 .878 .562
Leg extension 40 cm/sec           
   Work (J) 55.8 ± 44.6 92.7 ± 83.9 .006 .034 88.5 ± 79.4 119.3 ± 103.0 .007 .989 .661 .496
   Max. force (N) 251.3 ± 141.4 397.6 ± 270.5 .020 .052 375.2 ± 253.8 482.4 ± 313.8 .032 .523 .797 .940
   Max. power (W) 100.5 ± 56.5 158.1 ± 107.4 .020 .064 150.1 ± 101.5 193.0 ± 125.5 .032 .512 .773 .962
   Max. explosivity (N/sec) 2755.0 ± 1600.1 4800 ± 4187.9 .020 .078 4070.0 ± 2483.0 5151.8 ± 2840.8 .123 .848 1 .640
Leg extension 60 cm/sec           
   Work (J) 36.9 ± 32.9 62.3 ± 56.0 .020 .077 68.7 ± 78.6 88.4 ± 96.4 .005 .987 .576 .496
   Max. force (N) 178.3 ± 148.1 342.8 ± 287.0 .004 .027 312.1 ± 281.3 398.9 ± 334.8 .005 .654 .962 .819
   Max. power (W) 108.0 ± 87.7 205.7 ± 172.2 .010 .052 187.3 ± 168.7 239.3 ± 200.9 .005 .605 .915 .866
   Max. explosivity (N/sec) 3553.5 ± 2700.0 6373.5 ± 5249.4 .010 .027 4872.3 ± 3371.6 7093.6 ± 5412.1 .019 .809 .867 .682
  1. Wilcoxon Signed Ranks Test (exact 2-tailed significance): awith (N = 12) & without (N = 10) Last Observation Carried Forward approach, bWorst Rank Score analysis (N = 12); Mann-Whitney U Test (exact 2-tailed significance): cN = 21, d Last Observation Carried Forward approach (N = 23), eWorst Rank Score analysis (N = 23).