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Differences in Nervous Autonomic Control in Response to a Single Session of Exercise in Bodybuilders Using Anabolic Androgenic Steroids
- Source :
- Journal of Human Kinetics
- Publication Year :
- 2021
- Publisher :
- Sciendo, 2021.
-
Abstract
- Considering the role of autonomic nerve activity in blood pressure control, this study aimed to investigate the cardiac autonomic nerve responses after an aerobic exercise session in Anabolic Androgenic Steroids (AAS) users. Twenty men (AAS, n = 9; control group, n = 11) performed an aerobic exercise session (60 min, 70 to 80% of HRmax). Heart rate variability (HRV) was assessed before and during a 60-min post-exercise recovery period. RMSSD (root mean square successive difference of the RR intervals) and the LF/HF ratio (low frequency/high frequency spectra) were also evaluated. The Student's t-test for independent samples was used to compare differences between initial group characteristics. Repeated measures ANOVA was used to compare pre- and post-exercise HRV recovery (p < 0.05). AAS had a lower SDNN (standard deviation of the intervals) (40.8 ± 16.8 vs. 71.6 ± 24.7 ms; p = 0.04, d = 1.4) and a higher LF/HF (3.4 ± 2.1 vs. 1.8 ± 0.9%; p = 0.03, d = 0.9) before exercise. AAS and controls had similar RMSSD (14.0 ± 15.8 vs. 18.9 ± 12.1 ms; p = 0.20) and a LF/HF (2.8 ± 1.6 vs. 2.4 ± 1.2 ms; p = 0.41) immediately post-exercise. The between-groups comparison revealed a higher HF/LF at 30 min (4.3 ± 1.4 vs. 2.5 ± 1.3%; p = 0.008, d = 1.3) and 60 min (5.0 ± 2.2 vs. 2.3 ± 0.8%; p = 0.001, d = 1.6) for the AAS group in the recovery time. This study demonstrated impaired parasympathetic activity at rest and immediately after the exercise session as an adverse effect of AAS usage, but similar behavior regarding the restoration of sympathetic activity.
- Subjects :
- medicine.medical_specialty
business.industry
autonomic nervous system
heart rate variability
Physical Therapy, Sports Therapy and Rehabilitation
Anabolic-Androgenic Steroids
Autonomic control
Section II - Exercise Physiology & Sports Medicine
Endocrinology
physical exercise
Physiology (medical)
Internal medicine
medicine
anabolic agents
business
Single session
Subjects
Details
- Language :
- English
- ISSN :
- 18997562 and 16405544
- Volume :
- 80
- Database :
- OpenAIRE
- Journal :
- Journal of Human Kinetics
- Accession number :
- edsair.doi.dedup.....20c34ad4f4649fa8e577a48db861534e