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Table 1 Differences, RMSE and correlations of the velocities of the bar Vmean, Vmax and t Vmax during traditional squats

From: Validity and reliability of simple measurement device to assess the velocity of the barbell during squats

  T-force Tendo GymAware
Δ Vmean
 Minimum − 0.014 − 0.069 − 0.053
 Maximum 0.136 0.137 0.158
 Average 0.062 0.020 0.046
 RMSE 0.070 0.046 0.064
r Vmean
 Correlation 0.970* 0.963* 0.958*
Δ Vmax
 Minimum − 0.057 − 0.063 − 0.102
 Maximum 0.369 0.422 0.388
 Average 0.119 0.159 0.128
 RMSE 0.151 0.194 0.163
r Vmax
 Correlation 0.933* 0.932* 0.957*
Δ t Vmax
 Minimum − 0.075 − 0.090 − 0.006
 Maximum 0.050 0.088 0.084
 Average 0.010 0.031 0.037
 RMSE 0.026 0.041 0.042
r t Vmax
 Correlation 0.985* 0.985* 0.990*
  1. The units are m/s for the velocities and s for time
  2. * Correlation is significant at a level of p < 0.01