Kinetic and kinematic differences between squats performed with and without elastic bands

Area of Science:

• Biomechanics
• Exercise Physiology

Background:

• Elastic bands are increasingly used as resistance in strength training.
• Understanding their effect on movement kinetics and muscle activation is crucial for optimizing training protocols.

Purpose of the Study:

• To compare kinetic and kinematic variables of squats performed with and without elastic bands, matched for total work.
• To analyze the impact of elastic bands on force, velocity, power, and electromyography (EMG) during squatting.

Main Methods:

• Ten recreationally weight-trained males performed squats with and without elastic bands.
• Measurements included force, bar displacement (velocity), and vastus lateralis EMG.
• Data were analyzed for differences in force-time, velocity-time, power-time, and EMG-time curves.

Main Results:

• Elastic bands increased force during early eccentric and late concentric phases.
• Higher power and velocity were observed with bands during early eccentric and late concentric phases.
• Vastus lateralis muscle activity was significantly greater with elastic bands during these phases.

Conclusions:

• Squats with elastic bands, equalized for total work, significantly alter force, power, velocity, and muscle activation patterns.
• Elastic bands enhance force, power, and muscle activity during specific portions of the squat movement, particularly the early eccentric and late concentric phases.