Eur J Appl Physiol (2014) 114:2521–2528 DOI 10.1007/s00421-014-2957-z

ORIGINAL ARTICLE

G tolerance and the vasoconstrictor reserve Patrik Sundblad · Roger Kölegård · Ola Eiken 

Received: 29 March 2014 / Accepted: 15 July 2014 / Published online: 13 August 2014 © Springer-Verlag Berlin Heidelberg 2014

Abstract  Purpose  Because leg arterial stiffness is higher in subjects with high G tolerance, we hypothesized that subjects with high G tolerance would have larger capacity for vasoconstriction. Methods  Sixteen subjects, eight with high and eight with low G tolerance (H and L group, respectively), were exposed to a cold pressor test (CPT) in supine and upright posture. Heart rate (HR), mean arterial pressure (MAP) and cardiac output (CO) were measured, and total peripheral resistance (TPR) and stroke volume (SV) were calculated. Results  In the supine position, CPT increased TPR more in the H group; 31 ± 18 % than in the L group; 11 ± 7 % (p 

G tolerance and the vasoconstrictor reserve.

Because leg arterial stiffness is higher in subjects with high G tolerance, we hypothesized that subjects with high G tolerance would have larger capa...
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