Load - power relationship in the propulsive phase of full back squat movement

The purpose of this study was to investigate the load - power relationship during propulsive phase of full back squat (SQ) movement. For this purpose, thirty-two amateur male athletes (age: 20.4± 1.98 years; height: 179.3 ± 7.23 cm; weight: 73.5 ± 9.85 kg) who were actively involved in sports and had strenght at the basic level participated in the study voluntarily.Subjects were asked to perform the one repetition maximal (1RM) strength test and the loads (20, 30, 40, 50, 60, 70, 80, 90 and 100 %) corresponding to different percentages of the 1RM values of were calculated. Finally, subjects performed full back SQ movement for the loads corresponding to different percentages of 1RM and the power properties during propulsive phase was determined as mean power (MP), mean propulsive power (MPP) and peak power (PP). The descriptive statistics, correlation analysis and one-way analysis of variance (ANOVA) for dependent groups were used to evaluate the data. According to results; it was concluded that MP and PP values during propulsive phase of full back SQ movement performed for different loads demonstrate a gradual increase between 20 - 70 % of 1RM and then decreases. On the contrary, it was obtained that MPP values demonstratea gradual increasebetween 20-60 % of 1RM and then decreases. It was concluded that maximal power values for MPP parameter was reached at loads lifted in 60 % of 1RM, while maximal power values for MP (236,3 W) and PP (1382,5 W) parameters were reached at loads lifted in 70 % of 1RM. Also, it was seen that there are low level, positive and statistically a significant relationship between MP (r = ,218; p < 0.05) and PP (r = ,264; p < 0.05) parameters during propulsive phase of full back SQ movement with percentage load values of 1RM, while there is no statistically significant relationship between MPP and percentage load values of 1RM (r = ,107; p > 0.05). As a result; it was concluded that maximal power values during propulsive phase of full back SQ movement applied for different loads were reached during lifting performed in the middle loads and concluded that the most powerful relationship between load - power was obtained with PP parameter although it was low.