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The Influence of a Total Body Resistance Training Program on Autonomic Modulation and Strength Variables in Young
Cody A Altherr1,2, Kayla M Soave2, Paul R Nagelkirk2
1Clinical Exercise Physiology Laboratory, School of Kinesiology, Ball State University, Muncie, IN, USA.
International Journal of Exercise Science
|September 27, 2021
Summary
Resistance training improved tilt-table tolerance in young adults, increasing duration by 68 seconds. However, it did not significantly affect heart rate variability or other measures of autonomic function.
Area of Science:
- Exercise Physiology
- Autonomic Nervous System Function
- Cardiovascular Health
Background:
- Autonomic nervous system (ANS) modulation is crucial for cardiovascular regulation.
- Resistance training (RT) is known to improve muscular strength and body composition.
- The effects of RT on autonomic function, particularly tilt-table tolerance, require further investigation.
Purpose of the Study:
- To investigate the impact of an 8-week resistance training intervention on autonomic modulation in young adults.
- To assess changes in various quantitative measures of autonomic activity, including heart rate variability (HRV) and tilt-table tolerance.
- To determine if RT influences cardio-vagal or adrenergic function.
Main Methods:
- Seventeen healthy young adults (18-35 years) participated in the study.
- Participants underwent an 8-week full-body resistance training program, 3 days/week.
- Autonomic function was assessed using tilt-table testing, respiratory sinus arrhythmia (RSA), static handgrip, Valsalva maneuver, and HRV.
Main Results:
- Tilt-table duration significantly increased by 68 seconds (p=0.05) post-RT.
- Upper and lower body muscular strength showed significant improvements (p<0.001).
- Total lean mass increased (p<0.01), while fat mass remained unchanged. RSA, Valsalva ratio, static handgrip, and HRV were not significantly altered by RT.
Conclusions:
- Resistance training enhances tilt-table tolerance in young, healthy individuals.
- RT does not appear to significantly impact cardio-vagal or adrenergic function as measured by RSA, Valsalva, static handgrip, or HRV.
- RT is an effective intervention for improving cardiovascular stability and strength in young adults.
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