Relative Strength Does Not Influence the Sticking Region Among Recreational Trained Participants in Squat

Area of Science:

• Biomechanics
• Exercise Physiology

Background:

• The barbell back squat is a foundational exercise for developing lower-body strength and power.
• Understanding how relative strength influences squat kinematics is crucial for optimizing training and injury prevention.

Purpose of the Study:

• To investigate the effect of relative strength on the kinematic variables of the barbell back squat.
• To determine if differences in relative strength alter barbell velocity, acceleration, and displacement during a 90-degree squat.

Main Methods:

• Forty-six recreationally trained men performed a ten-repetition maximum (10 RM) back squat.
• Kinematic data including barbell velocity, acceleration, and displacement were recorded.
• Participants were divided into above-median and below-median relative strength groups (10 RM load/body weight).

Main Results:

• No statistically significant differences in vertical barbell displacement, velocity, or lifting time were observed between the relative strength groups.
• Kinematic variables within the pre-sticking, sticking, and post-sticking phases did not differ significantly between groups.
• A weak negative correlation was found between relative strength and overall barbell displacement when data from both groups were combined.

Conclusions:

• Relative strength levels do not appear to substantially influence the kinematics of a 90-degree barbell back squat in recreationally trained men.
• These findings suggest that training adaptations in relative strength may not necessitate significant alterations in squatting technique mechanics.