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Table 1 Inference statistics for the main and interaction effects

From: The role of increased post-impact ball speed on plantar pressure during topspin and slice longline forehand groundstrokes in female tennis players

Outcome

Main effect: BS

Main effect: ST

Main effect: FD

Interaction effect BS × ST

Interaction effect BS × FD

Interaction effect ST × FD

Interaction effect BS × ST × FD

Maximal force [N/kg]

0.060 (0.16)

0.377 (0.06)

0.721 (0.01)

0.211 (0.10)

0.873 (0.02)

0.942 (0.01)

0.503 (0.05)

Mean force [N/kg]

0.002 (0.29)

0.676 (0.01)

< 0.001 (0.68)

0.284 (0.09)

0.001 (0.31)

0.061 (0.23)

0.064 (0.16)

Force-time integral [Ns/kg]

0.028 (0.19)

0.335 (0.07)

< 0.001 (0.71)

0.081 (0.15)

0.245 (0.09)

0.274 (0.09)

0.311 (0.08)

  1. Values are expressed as p-value (ηp2-value). BS = ball speed; FD = foot dominance; ST = stroke type