Three Reasons for Playing the Tennis Forehand in Square Stance.

This study aims to compare the effectiveness of tennis forehand shots played by competitive athletes in open and square stances in terms of performance: (1) ball speed, (2) accuracy, and (3) gesture economy. This is with the aim of preventing the excessive wear and tear of the athlete's musculoskeletal structures.

Methods: Between October 2024 and January 2025, forty-two healthy players were involved in the study. Eighty forehands were played by each subject with open and square stances in lateral and diagonal-inside running structured situations. The ball's speed, shot accuracy, and the athlete's heart rate were acquired. Kruskal-Wallis's and Dunn post hoc tests were used to compare the effect of stance, tactical situation, gender, and player's flexibility on these performance variables. The Wilcoxon signed-rank t-test was applied to compare each of the two types of stances.

Results: Square stance consistently resulted in significantly higher ball speeds in both lateral running (Δ_Median: 6 km/h) and diagonal-inside running (Δ_Median: 4 km/h), while the differences in accuracy and metabolic demand were not significant overall.

Conclusions: This study found that the square stance technique provides a clear advantage in terms of ball speed. Although the higher accuracy found was not significant, the small difference in metabolic effort was. Overall, the benefits reported seem to make the square stance the preferable choice.