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Updated: Jun 9, 2026

Muscle Function Obtained with Motion Mode Ultrasound and Surface Electromyography during Core Endurance Exercise
Published on: August 25, 2022
Muscle activation of different core exercises
Gretchen D Oliver1, Priscilla M Dwelly, Nicholas D Sarantis
1Department of Health, Kinesiology, Recreation, and Dance, University of Arkansas, Fayetteville, Arkansas, USA. goliver@uark.edu
New research shows sports-specific movements using the CORE X significantly increase muscle activation in the lumbopelvic hip complex compared to traditional core exercises. This enhances core strength for better athletic performance.
Area of Science:
- Sports Medicine
- Exercise Physiology
- Biomechanics
Background:
- Optimizing muscle activation for sport performance is a key goal for health professionals.
- Traditional core stability exercises are commonly prescribed, but their effectiveness for sport-specific demands is questioned.
- The lumbopelvic hip complex is crucial for athletic function and injury prevention.
Purpose of the Study:
- To compare muscle activation of the lumbopelvic hip complex during traditional core exercises versus sports performance movements using the CORE X.
- To identify which exercise type elicits greater activation in key core and hip musculature.
Main Methods:
- Electromyographic (EMG) data were collected from fourteen healthy college-age males.
- Muscles analyzed included dominant gluteus maximus and medius, rectus abdominis, external oblique, and multifidus (bilateral).
- Muscle activation was measured during traditional core exercises and sports performance movements performed with the CORE X, quantified as a percentage of maximum voluntary isometric contraction (MVIC).
Main Results:
- Movements using the CORE X demonstrated significantly higher mean muscle activation for the dominant gluteus maximus (48.3% MVIC) and medius (65.3% MVIC), and multifidus muscles (dominant 57.8% MVIC, non-dominant 56.4% MVIC).
- Traditional core exercises yielded greater mean muscle activation for the rectus abdominis (dominant 45.1% MVIC, non-dominant 47.4% MVIC) and external obliques (dominant 45.8% MVIC, non-dominant 47.8% MVIC).
- Significant differences in muscle activation were observed between the two exercise programs for most muscles investigated (p < 0.05), excluding external obliques.
Conclusions:
- Performing sports-specific movements with the CORE X leads to greater activation of the core musculature compared to traditional exercises.
- Coaches and trainers should consider incorporating sports-specific movements with the CORE X to enhance core neutral training.
- This approach may improve sport performance by more effectively engaging the lumbopelvic hip complex.
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