The Comparison of Intraocular Pressure Reductions after Isometric and Isokinetic Exercises in Normal Individuals

Abstract

The lowering effect of physical exercise on intraocular pressure (IOP) has been reported both in healthy people and those with glaucoma, but a comparison of the lowering effect of isometric and isokinetic exercises on IOP has not been conducted in any study. Our aims were to investigate the relationship between intensity of exercise and IOP, and whether a significant difference in IOP lowering effect existed between isometric and isokinetic exercises. Sixty-seven patients with an age range of 23–40 who had no ocular disease were randomly divided into two groups. While 31 patients in the first group, group A, performed isokinetic exercise with the Cybex 6000 dynamometer, 32 patients in the second group, group B, had isometric exercises with the same machine. IOP was measured in the right eye of patients with Shiøtz tonometer just before and 10 min following exercise. Exercise intensity and total energy consumption were determined by the machine for each patient. While IOP values measured before exercise, the degree of exercise applied, and total energy consumption did not differ significantly between groups, both isometric and isotonic exercises lowered IOP significantly. As a result, isometric and isokinetic exercises lowered IOP in ophthalmologically normal subjects with direct relationship to exercise intensity and total energy consumption. Since the pressure lowering effect of isokinetic exercise was more significant, it might prove useful to glaucomatous patients.

Variação da pressão intraocular após teste submáximo de força no treinamento resistido

“…Na prática de exercícios aeróbios esta diminuição é mais evidente do que nos exercícios anaeróbios, tanto para praticantes de exercícios quanto para sedentários (11) . A maior diminuição da PIO com exercícios dinâmicos do que com os isométricos foi motivo para indicá-los como coadjuvantes no tratamento de pacientes com glaucoma (12) . Exercícios leves, moderados ou intensos foram estimulados aos pacientes com glaucoma devido à ação hipotensiva (13) .…”

The accute effects of resistance exercise on intraocular pressure

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Several studies have shown the effects of IOP reduction after practicing aerobic and anaerobic physical activities (1)(2)(3)(4) . The causes of such changes have been the target of many studies.

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To compare Intra Ocular Pressure changes after isometric exercise of hand and leg muscles in young adults

“…1,4,5 Relationship between isokinetic exercise &IOP showed significant lowering of IOP after exercise. 2,3 Study of IOP after isometric exercise of large bulky muscles of leg has not yet been carried out.…”