Research Article

Acute Effects Of Autoregulated And Non-autoregulated Blood Flow Restrictive Exercise On Arterial Stiffness

Published: 2023-9

Journal: Medicine & Science in Sports & Exercise

DOI: 10.1249/01.mss.0000980200.41641.da

Abstract

B-23 Blood Flow **Acute Effects Of Autoregulated And Non-autoregulated Blood Flow Restrictive Exercise On Arterial Stiffness** 186 Werner, Tim1; Rolnick, Nicholas2; Licameli, Nicholas3; Moghaddam, Masoud4; Marquette, Lisa1; Walter, Jessica1; Fedorko, Brent1 **Author Information** 1 Salisbury University, Salisbury, MD. 2 Lehman College, New York, NY. 3 Strength Together Inc., Rutherford, NJ. 4 University of Maryland Eastern Shore, Princess Anne, MD. (Sponsor: Tim Werner, FACSM) **Journal**: Medicine & Science in Sports & Exercise 55(9S):p 51-52, September 2023. | **DOI**: 10.1249/01.mss.0000980200.41641.da The popularity of blood flow restriction (BFR) exercise has increased in both clinical and athletic populations in the last few years. The impact of this type of training on arterial stiffness is less understood. **PURPOSE**: To investigate the acute effects of autoregulated (AR) and non-autoregulated (NAR) BFR exercise on indices of arterial stiffness. AR BFR training devices adjust pressure in the cuff ensuring similar pressure throughout the range of motion when the muscles are contracted (dilatated) and relaxed. NAR BFR training devices do not adjust pressure in the cuff throughout the range of motion when the muscles are contracted and relaxed which cause greater pressures at different points in the range of motion. **METHODS**: Following a randomized AR or NAR familiarization training session, 20 adults (23 ± 5 years; 7 female) participated in 3 randomized treatment-order sessions with AR-BFR, NAR-BFR, and no-BFR separated by 1-week washout periods. Participants performed 4 sets of dumbbell wall squats to failure using 20% of 1 repetition maximum (1-RM) at 2-second concentric/eccentric cadence. Pneumatic straps were placed around the proximal portion of each thigh and training limb occlusion pressure (LOP) was set at 60% of supine LOP for both the AT and NAR sessions. Testing before and immediately following the training session included ultrasonography of the carotid artery, applanation tonometry, and blood pressure acquisition. Two-way ANOVAs were used to examine the effects of treatment and the treatment-order interaction on pulse wave velocity (PWV), beta-stiffness index (β-stiff), and arterial compliance (AC). **RESULTS**: There were no baseline differences in CF- (carotid-femoral) PWV, CR- (carotid-radial) PWV, β-stiff, and AC (all p > 0.05). CF-PWV increased in the NAR-BFR (mean difference = 0.57 ± 1.12 m/s, p = 0.02) and no-BFR (mean difference = 0.63 ± 1.42 m/s, p = 0.03) groups following the exercise session. CR-PWV increased in the no-BFR (mean difference = 0.82 ± 1.5 m/s, p = 0.03) group. And there was an interaction effect in CF-PWV between AR-BFR and NAR-BFR (mean difference = 0.70 ± 1.6 m/s, p = 0.03). **CONCLUSION**: These findings show acute AR-BFR training does not influence indices of arterial stiffness while acute NAR-BFR training increases central stiffness. Copyright © 2023 by the American College of Sports Medicine

Faculty Members

  • Tim Werner - Salisbury University, Salisbury, MD.
  • Nicholas Licameli - Strength Together Inc., Rutherford, NJ.
  • Masoud Moghaddam - University of Maryland Eastern Shore, Princess Anne, MD. (Sponsor: Tim Werner, FACSM)
  • Lisa Marquette - Salisbury University, Salisbury, MD.
  • Nicholas Rolnick - Lehman College, New York, NY.
  • Brent Fedorko - Salisbury University, Salisbury, MD.
  • Jessica Walter - Salisbury University, Salisbury, MD.

Themes

  • Arterial Stiffness
  • Exercise Prescription
  • Blood Flow Restriction Exercise
  • Acute Effects of Exercise

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