Accelerations and EMG Differences Between Isocaloric High-Incline Walking and Level-Grade Jogging
Taj Krieger1, Motoki Sato1, Lex Gidley2
1Department of Kinesiology, California State Polytechnic University, Humboldt, Arcata, CA, USA.
International Journal of Exercise Science
|October 13, 2025
Summary
High-incline walking (HIW) offers a lower-impact exercise alternative to level-grade jogging (LGJ). Despite matched intensity, HIW shows less muscle activation and lower impact accelerations, making it suitable for injury prevention.
Area of Science:
- Biomechanics
- Exercise Physiology
- Sports Science
Background:
- High-incline walking (HIW) is a recognized cardiovascular exercise.
- It is often considered an alternative to level-grade jogging (LGJ).
- Understanding muscle activation and biomechanical differences is crucial for exercise prescription.
Purpose of the Study:
- To compare muscle activation and biomechanical parameters between HIW and LGJ.
- To evaluate differences at matched isocaloric exercise intensities.
- To determine the suitability of HIW as a lower-impact alternative.
Main Methods:
- Nineteen physically inactive adults (18-31 years) participated.
- Participants underwent two 10-minute isocaloric trials: 20% grade HIW and LGJ.
- Electromyography (EMG) and inertial measurement units (IMUs) measured muscle activation and accelerations.
Main Results:
- Level-grade jogging (LGJ) showed significantly higher peak resultant accelerations for the foot and sacrum.
- Peak and integral muscle activation in tibialis anterior (TA) and vastus lateralis (VL) were greater during LGJ.
- HIW demonstrated lower impact forces and muscle engagement compared to LGJ at matched intensities.
Conclusions:
- High-incline walking (HIW) is a viable, lower-impact alternative to level-grade jogging (LGJ).
- HIW provides comparable cardiovascular demand with reduced biomechanical stress.
- Findings support HIW for exercise prescription, particularly for injury prevention.
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