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Insight into muscle activity during deep water running
Kenji Masumoto1, David Delion, John A Mercer
1Department of Kinesiology, University of Nevada, Las Vegas, NV 89154-3034, USA.
Medicine and Science in Sports and Exercise
|September 4, 2009
Summary
Deep water running (DWR) significantly reduces muscle activity in the tibialis anterior and gastrocnemius compared to treadmill running (TMR). Higher intensity DWR can match lower intensity TMR muscle activation levels.
Area of Science:
- Biomechanics
- Exercise Physiology
- Sports Science
Background:
- Deep water running (DWR) is a low-impact aerobic exercise.
- Treadmill running (TMR) is a common form of aerobic exercise.
- Understanding muscle activation differences is crucial for exercise prescription.
Purpose of the Study:
- To compare muscle activity and patterns between DWR and TMR.
- To assess these differences at equivalent levels of perceived exertion (RPE).
Main Methods:
- Seven subjects performed DWR and TMR at RPE 11, 13, and 15.
- Surface electromyography (EMG) measured rectus femoris (RF), biceps femoris (BF), tibialis anterior (TA), and gastrocnemius (GA) activity.
- EMG data were analyzed for average magnitudes and ensemble patterns.
Main Results:
- TA and GA muscle activity were significantly lower in DWR than TMR (72%-86% decrease).
- BF and RF muscle activity showed no significant difference or tended to be lower in DWR.
- Muscle activity magnitudes were consistently lower across all RPE levels in DWR.
Conclusions:
- DWR elicits substantially lower muscle activation in lower leg muscles (TA, GA) compared to TMR.
- Higher intensity DWR (RPE 15) can achieve similar muscle activation to lower intensity TMR (RPE 11).
- DWR may offer a less strenuous alternative for certain muscle groups while maintaining comparable intensity.
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