Abstract
This study aimed to investigate the acute effects of autoregulated and
non-autoregulated applied pressures during blood flow restriction resistance
exercise to volitional fatigue on indices of arterial stiffness using the Delfi
Personalized Tourniquet System. Following a randomized autoregulated or
non-autoregulated blood flow restriction familiarization session, 20 physically
active adults (23±5 years; 7 females) participated in three randomized
treatment-order sessions with autoregulated and non-autoregulated and no blood
flow restriction training. Participants performed four sets of dumbbell wall
squats to failure using 20% of one repetition maximum. Blood flow
restriction was performed with 60% of supine limb occlusion pressure.
Testing before and post-session included an ultrasonic scan of the carotid
artery, applanation tonometry, and blood pressure acquisition.
Carotid-femoral pulse wave velocity increased in the non-autoregulated and no
blood flow restriction training groups following exercise while carotid-radial
pulse wave velocity increased in the no blood flow restriction training group
(all p<0.05). Carotid-femoral pulse wave velocity exhibited an
interaction effect between autoregulated and non-autoregulated blood flow
restriction in favor of autoregulated blood flow restriction (p<0.05).
Autoregulated blood flow restriction training does not influence indices of
arterial stiffness while non-autoregulated and no blood flow restriction
training increases central stiffness.
Key words
training - safety - central stiffness - pulse wave velocity