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Effect of handgripping on ocular perfusion pressure (OPP) and optic nerve head blood flow (ONHBF). Three periods of isometric exercise were scheduled for each subject (n = 39). Data are presented before during and after the 1st handgripping experiment (BL1, HG1, RE1), before during and after the 2nd handgripping experiment (BL2, HG2, RE2) and before during and after the 3rd handgripping experiment (BL3, HG3, RE3). In the boxplots, the means and standard deviations are shown.
