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Table 2 Correlation and simple regression to predict the two-force-platform variables from the one-platform variables

From: The validity of using one force platform to quantify whole-body forces, velocities, and power during a plyometric push-up

  Correlation Simple regression
Peak GRFs applied to hands (body weight)

Peak whole-body GRFs (body weight) r = 0.99
(p < 0.05)
y = 0.97x + 0.20
r2 = 0.97
Peak whole-body velocities (m/s) r = 0.60
(p < 0.05)
y = 0.37x + 0.39
r2 = 0.35
Peak whole-body power (watt/body weight) r = 0.63
(p < 0.05)
y = 0.38x + 0.42
r2 = 0.39
GRFs applied to the feet at the starting position (body weight)

Mean GRFs applied to the feet during the push-up (body weight) r = 0.92
(p < 0.05)
y = 0.93x – 0.01
r2 = 0.84
Whole-body GRFs at peak whole-body power (body weight) r = 0.72
(p < 0.05)
y = 0.74x + 0.30
r2 = 0.50
Whole-body velocities at peak whole-body power (m/s) r = 0.59
(p < 0.05)
y = 0.38x + 0.38
r2 = 0.34