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.

1.
McDaniel DR, Tribe CL, Tobias GS: Effects of moderate exercise on intraocular pressure. Am J Optom Physiol Opt 1983;60:154–157.
2.
Quireshi IA: The effects of mild, moderate, and severe exercise on intraocular pressure in glaucoma patients. Jpn J Physiol 1995;45:561–569.
3.
Quireshi IA: Effects of exercise in intraocular pressure in physically fit subjects. Clin Exp Pharmacol Physiol 1996;23:648–652.
4.
Quireshi IA: Effects of mild, moderate and severe exercise on intraocular pressure of sedentary subjects. Ann Hum Biol 1995;22:545–553.
5.
Quireshi IA, Xi XR, Huang YB, Wu XD: Magnitude of decrease in intraocular pressure depends upon intensity of exercise. Korean J Ophthalmol 1996;10:109–115.
6.
Kiuchi Y, Mishima HK, Hotehama Y, Furumoto A, Hirota A, Onari K: Exercise intensity determines the magnitude of IOP decrease after running. Jpn J Ophthalmol 1994;38:191–195.
7.
Harris A, Malinovsky V, Martin B: Correlates of acute exercise-induced ocular hypotension. Invest Ophthalmol Vis Sci 1994;35:3852–3857.
8.
Harris A, Malinovsky VE, Cantor LB, Henderson PA, Martin BJ: Isocapnia blocs exercise-induced reductions in ocular tension. Invest Ophthalmol Vis Sci 1992;33:2229–2232.
9.
User’s Guide: Cybex 6000 Testing and Rehabilitation System. New York, 1992.
10.
Byl NN, Wells L, Grady D: Consistency of repeated isokinetic testing: Effects of different examiners, sites and protocols. Isokinetics Exerc Sci 1991;1:122–130.
11.
Gross MT, Hoffman GM, Philips CN: Intramachine and intermachine reliability of the Biodex and Cidex II for knee flexion and extension peak torque and angular work. J Orthop Sports Phys Ther 1991;13:329–335.
12.
Molczyk L, Thigpen LK, Eickhoff J: Reliability of testing the extensor and flexors in healthy adult women using a Cybex II isokinetic dynamometer. J Orthop Sports Phys Ther 1991;14:37–41.
13.
Era P, Parssinen O, Kallinen M, Suominen H: Effect of bicycle ergometer test on intraocular pressure in elderly athletes and controls. Acta Ophthalmol (Copenhagen) 1993;71:301–307.
14.
Passo MS, Goldberg L, Elliot DL, Van Buskirk EM: Exercise training reduces intraocular pressure among subjects suspected of having glaucoma. Arch Ophthalmol 1991;109:1096–1098.
15.
Askenazi I, Melamed S, Blumenthal M: The effect of continuous strenuous exercise on intraocular pressure. Invest Ophthalmol Vis Sci 1992;33:2874–2877.
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