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This study investigated whether whole body resistance training would increase tolerance to lower body negative pressure (LBNP). Twelve males (age = 19.6 +/- 0.4 yr; mean +/- SD) underwent an acute, 12-wk program of upper and lower body resistance training (ART). Pre- and posttraining, the ART group and a control group (CON; N = 8; age = 25.4 +/- 2.4 yr) underwent LBNP tolerance tests and neck pressure-suction testing. Additionally, a group of chronically resistance-trained individuals (CRT group; N = 5; age = 22.4 +/- 0.9 yr) were tested. LBNP tolerance was increased in the ART group after training and the CRT group exhibited a significantly higher LBNP tolerance than the other groups. The ART group exhibited a decreased leg circumference change at the same absolute negative pressure at which tolerance occurred pretraining. This indicated a decreased fluid pooling after ART. The CRT group exhibited a "flattened" hypotensive portion of the carotid sinus-heart rate baroreflex curve, but this appeared to be due to the increased neck muscle mass of the subjects. We conclude that whole body ART increases LBNP tolerance possibly mediated through alterations in vascular compliance. CRT results in even greater LBNP tolerance with the responsible mediating mechanisms unclear.
J T Lightfoot, and
D J Torok, and
T W Journell, and
M J Turner, and
R P Claytor
November 2001,
Zhongguo ying yong sheng li xue za zhi = Zhongguo yingyong shenglixue zazhi = Chinese journal of applied physiology,
J T Lightfoot, and
D J Torok, and
T W Journell, and
M J Turner, and
R P Claytor
December 2007,
Journal of applied physiology (Bethesda, Md. : 1985),
J T Lightfoot, and
D J Torok, and
T W Journell, and
M J Turner, and
R P Claytor
November 2000,
Aviation, space, and environmental medicine,
J T Lightfoot, and
D J Torok, and
T W Journell, and
M J Turner, and
R P Claytor
April 1996,
Journal of applied physiology (Bethesda, Md. : 1985),
J T Lightfoot, and
D J Torok, and
T W Journell, and
M J Turner, and
R P Claytor
May 1994,
Aviation, space, and environmental medicine,
J T Lightfoot, and
D J Torok, and
T W Journell, and
M J Turner, and
R P Claytor
May 1986,
Aviation, space, and environmental medicine,
J T Lightfoot, and
D J Torok, and
T W Journell, and
M J Turner, and
R P Claytor
June 2004,
Hang tian yi xue yu yi xue gong cheng = Space medicine & medical engineering,
J T Lightfoot, and
D J Torok, and
T W Journell, and
M J Turner, and
R P Claytor
September 2013,
American journal of physiology. Regulatory, integrative and comparative physiology,
J T Lightfoot, and
D J Torok, and
T W Journell, and
M J Turner, and
R P Claytor
September 2001,
Clinical physiology (Oxford, England),
J T Lightfoot, and
D J Torok, and
T W Journell, and
M J Turner, and
R P Claytor
December 1997,
Hang tian yi xue yu yi xue gong cheng = Space medicine & medical engineering,
