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Table 2 Analysis through sEMG for MVC test in the different muscles in land/water

From: A comparison land-water environment of maximal voluntary isometric contraction during manual muscle testing through surface electromyography

LAND MAX_ISO_TRAP MAX_ISO_PECT MAX_ISO_DELTA MAX_ISO_DELTM MAX_ISO_INFR MAX_ISO_DORS MAX_ISO_ESPIN
Average(μV) 728.37 693.37 1116.00 1812.12 671.43 633.06 156.87
SD ±570.17 ±433.43 ±705.02 ±1079.56 ±450.13 ±479.32 ±128.50
95% Confidence Intervals 424.54 462.41 740.31 1236.86 431.57 377.64 88.39
1032.20 924.33 1491.68 2387.38 911.29 888.47 225.35
WATER MAX_ISO_TRAP MAX_ISO_PECT MAX_ISO_DELTA MAX_ISO_DELTM MAX_ISO_INFR MAX_ISO_DORS MAX_ISO_ESPIN
Average(μV) 661.75 1219.12 1000.12 1674.37 954.81 72.00 247.06
SD ±636.55 ±1011.54 ±821.70 ±2656.80 ±675.07 ±117.34 ±348.19
95% Confidence Intervals 322.55 680.10 562.26 258.66 595.08 9.47 61.52
1000.94 1758.14 1437.98 3090.08 1314.53 134.52 432.60
Difference% land/water 9% −40% 10% 7% −30% 90% −35%
ICC .278 −.004 −.009 .024 .151 .100 .082
Cronbach .435 −.009 −-017 .047 .263 .182 .152
Sig. .134 .063 .679 .148 .301 .001* .569
  1. *= p < .05μV: microvolts.
  2. ICC: intra-class correlation coefficient.
  3. SD: Standard Deviation.
  4. MAX_ISO_TRAP: Maximum isometric trapezius.
  5. MAX_ISO_DELTA: Maximum isometric anterior delt.
  6. MAX_ISO_PECT: Maximum isometric pectoralis.
  7. MAX_ISO_DELTM: Maximum isometric middle delt.
  8. MAX_ISO_INFR: Maximum isometric infraspinatus.
  9. MAX_ISO_DORS: Maximum isometric latissimus dorsi.
  10. MAX_ISO_ESPIN: Maximum isometric cervical erector spinae.