Velocity-Based Training With Weightlifting Derivatives: Barbell and System Velocity Comparisons

Area of Science:

• Sports Science
• Biomechanics
• Strength and Conditioning

Background:

• Velocity-based training (VBT) is increasingly used in strength and conditioning.
• Understanding the nuances between barbell and system velocity is crucial for VBT application.
• Previous research has not comprehensively compared these velocities across various weightlifting derivatives and loads.

Purpose of the Study:

• To investigate the differences between barbell velocity and system (subject + load) velocity.
• To compare these velocities during multiple weightlifting derivatives across a wide range of relative loads.
• To determine the practical implications for strength and conditioning practitioners.

Main Methods:

• 14 resistance-trained men performed jump shrug, hang high pull, hang power clean, hang clean pull, and countermovement shrug.
• Exercises were tested across various relative loads (20-140% of 1RM hang power clean).
• Barbell and system velocities were measured using a linear position transducer and force platform.

Main Results:

• Mean and peak barbell velocities were significantly and meaningfully greater than system velocities across all exercises and loads.
• The differences between barbell and system velocity were consistent regardless of the exercise or load intensity.
• The transition phase may influence the interpretation of mean velocity data.

Conclusions:

• Barbell velocity and system velocity are distinct biomechanical characteristics.
• These measures should not be used interchangeably in training or research.
• Mean velocity data may not be sufficiently informative for load prescription in velocity-based training.