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Related Experiment Video

Updated: Jun 25, 2026

Quantifying Arms and Legs Contributions during Repetitive Electrically-Assisted Sit-To-Stand Exercise in Paraplegics: A Pilot Study
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Multigrip flexible device: electromyographical analysis and comparison with the bench press exercise.

Pierre Giorgio1, Pierre Samozino, Jean-Benoît Morin

  • 1Department of Sport Sciences and Physical Education, University of Saint-Etienne, Saint-Etienne, France.

Journal of Strength and Conditioning Research
|February 12, 2009
PubMed
Summary

This study found that a novel warpable fitness device can effectively engage upper body muscles, comparable to traditional bench press exercises at moderate loads. Grip and arm position significantly influence muscle activation, making it suitable for training and rehabilitation.

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Area of Science:

  • Biomechanics
  • Exercise Physiology
  • Rehabilitation Science

Background:

  • The increasing demand for versatile fitness equipment necessitates research into novel devices.
  • Understanding muscle activation patterns is crucial for optimizing exercise efficacy and safety.

Purpose of the Study:

  • To analyze the electromyographical (EMG) activity of the pectoralis major, anterior deltoid, and triceps brachii during exercises with a multigrip warpable fitness device.
  • To compare this device's muscle activation to bench press exercises at various intensities.
  • To evaluate the impact of different grips and arm positions on muscle engagement.

Main Methods:

  • EMG activity was measured in 13 students during bench press exercises at 20-100% maximal repetition and 6 movements with the warpable device (varying grips, arm positions, concentric/isometric conditions).
  • Peak EMG activity was recorded during the concentric phase of movements.

Main Results:

  • Muscle activation varied significantly with grip (p < 0.05), matching bench press loads from 20-80% maximal repetition.
  • Altering arm position (outstretched, butterfly) significantly increased pectoralis major and anterior deltoid activation.
  • Isometric actions with the device did not yield higher activation, indicating it's not an instability device.

Conclusions:

  • The multigrip warpable fitness device offers a viable option for muscle strengthening and warm-up exercises.
  • Its adjustable resistance and grip variations allow for progressive force production, beneficial for physical therapy and upper-limb rehabilitation.
  • Further research could explore its potential in diverse training populations and therapeutic settings.