title: Cardiovascular stress reactivity tasks successfully predict the hypotensive response of isometric handgrip training in hypertensives.
abstract: This study aimed to determine whether: (a) isometric handgrip (IHG) training lowers resting blood pressure (BP), (b) cardiovascular reactivity to a serial subtraction (SST), IHG (IHGT), and cold pressor (CPT) task predicts this hypotensive response, and (c) cardiovascular reactivity is attenuated posttraining. Resting BP and cardiovascular reactivity to a SST, IHGT, and CPT were measured in 24 hypertensives (51-74 years) before and after 10 weeks of IHG training (n = 12) or control (n = 12). IHG training lowered resting BP (Δ8/5 mmHg), whereby the decrease in systolic BP was correlated to pretraining systolic BP reactivity to the SST (r = -.85) and IHGT (r = -.79; all ps < .01), but not the CPT (r = .34; p > .01). Furthermore, following IHG training, systolic BP reactivity to the SST (Δ7 mmHg) and IHGT (Δ8 mmHg) was reduced (all ps < .01). The results offer promising implications for hypertensives and may provide a tool to identify IHG training responders.
authors: Physical Activity and Cardiovascular Research Laboratory, Department of Kinesiology, University of Windsor, Windsor, Ontario, Canada. badrovm@uwindsor.ca
authors: Mark B
authors: MB
authors: Badrov
authors: Sean
authors: S
authors: Horton
authors: Philip J
authors: PJ
authors: Millar
authors: Cheri L
authors: CL
authors: McGowan
mesh_terms: D000368:Aged; D001794:Blood Pressure / Q000502:physiology*; D002320:Cardiovascular Physiological Phenomena; D003080:Cold Temperature; D005081:Exercise Therapy; D005260:Female; D018737:Hand Strength / Q000502:physiology*; D006801:Humans; D006973:Hypertension / Q000503:physiopathology*; D007537:Isometric Contraction / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D010806:Physical Education and Training; D011237:Predictive Value of Tests; D011597:Psychomotor Performance / Q000502:physiology; D013312:Stress, Physiological / Q000502:physiology*