Biophysics 1 Centers-of-mass 1 Double‐poling skiing technique 1 Force Curve 1 Force and displacements 1 Force-time curves Gait analysis 1 Ground reaction forces 1 Multiple correlation 1 Propulsive forces 1 Reference values 1 Sporting goods 1 Sports 1 V2‐skating skiing technique 1 double‐poling skiing technique 1 propulsive force 1