Effect of Lower Body Negative Pressure on Phase I Cardiovascular Responses at Exercise Onset.

The overall mean was 37.5±3.6 mmHg and 39.3±3.6 mmHg, respectively at rest and exercise, being significantly higher in the latter case. Discussion The results of this study were coherent with the tested hypothesis, as long as there was: 1) a progressive increase in A 1 for SV as a function of the LBNP level, 2) a clear trend toward a reduction of A 1 of HR with LBNP, 3) invariant time constants.

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