Predicting Loading Intensity Measuring Velocity in Barbell Hip Thrust Exercise.

Area of Science:

• Sports Science
• Biomechanics
• Strength and Conditioning

Background:

• The barbell hip thrust is a key exercise for hip extensor development.
• Traditional one-repetition maximum (1RM) testing for load determination is time-intensive.
• Velocity-based training offers a practical alternative for monitoring exercise intensity.

Purpose of the Study:

• To investigate the relationship between mean velocity (MV) and mean propulsive velocity (MPV) and relative training loads (%1RM) during the barbell hip thrust.
• To develop a velocity-based prediction model for estimating training intensity in this exercise.

Main Methods:

• One hundred two male students completed an incremental 1RM test for the barbell hip thrust.
• A linear position transducer was used to measure MV and MPV.
• Regression analysis was employed to establish prediction models.

Main Results:

• One-repetition maximum (1RM) was achieved at a mean velocity of 0.25 m·s-1.
• Velocity-based regression models demonstrated high predictive accuracy (R2 = 0.94).
• The standard error of estimate for predicting relative load was approximately 7% 1RM for both MV and MPV.

Conclusions:

• Velocity measurements, specifically MV and MPV, provide a reliable method for predicting relative loads in the barbell hip thrust.
• These findings support the use of velocity-based models for practical prescription and monitoring of training intensity.
• This approach eliminates the need for traditional 1RM testing, enhancing efficiency in strength and conditioning settings.