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Eliska Najmanova, Frantisek Pluhacek; The Effect of the Maximal Aerobic Exercise Test on Intraocular Pressure. Invest. Ophthalmol. Vis. Sci. 2017;58(8):1070.
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© ARVO (1962-2015); The Authors (2016-present)
It is known that a single aerobic physical activity causes the intraocular pressure (IOP) decrease which is depend on its value (IOPr) and physical fitness level, but the effect of the vigorous aerobic exercise is unknown. The goal of this study is to find out the influence of IOPr and the physical fitness level on the changes in IOP during the resting time after the vigorous physical aerobic activity. The physical fitness level is represented by maximal oxygen uptake (VO2max).
Twenty-four participants gradually underwent the three parts of the measurement. The IOPr was measured after resting time in the supine position. A treadmill was used to attain maximal effort activity. Continuous analysis of breath-by-breath ventilation and gas exchange for calculating the VO2max was also carried out. The participants finally had a 30 min cool down in the supine position. Simultaneously the IOP was measured in 5 min intervals. Based on IOPr or VO2max, the subjects were divided into lower (IOPr ≤ 17.40 mmHg) and higher (IOPr > 17.40 mmHg) IOP groups and lower and higher fitness groups (VO2max ≤ 38.65 and VO2max > 38.65 mmHg). The results were statistically analysed by ANOVA with a significance level of 5%.
The IOP values before and after the exercise did not differ significantly (p = 0.12). However, the lower IOPr revealed a significant increase in IOP (with a mean value 3.0 mmHg and standard deviation 3.7 mmHg) after exercise in comparison with the higher IOPr (with a mean difference 0.2 mmHg and standard deviation 3.3 mmHg) (p = 0.0069). This relationship corresponds to the significant correlation between IOPr and its change after exercise averaged over time with the coefficient r = -0.71. The effects of VO2max on IOP changes were insignificant (p = 0.61) as well as the VO2max interaction with IOPr (p = 0.48).
The negative correlation between the IOP initial value and its change after the strain activity was proved (the lower IOPr gives the higher IOP increase). Previous findings in terms of a single physical activity revealed a similar trend. The overall change of the IOP was insignificant after the strain activity. No relationship was found between IOP change and individual VO2max value.
This is an abstract that was submitted for the 2017 ARVO Annual Meeting, held in Baltimore, MD, May 7-11, 2017.
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