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Weightlifting increases pressure within the eye
September 12, 2006Weightlifting may cause a temporary increase in pressure within the eye, with higher pressure occurring with breath-holding during a weightlifting exercise, according to a report in the September issue of Archives of Ophthalmology, one of the JAMA/Archives journals.
Intraocular pressure (the pressure within the eyeball) is generally decreased after aerobic exercise, such as running and biking, and nonaerobic exercise, including weightlifting, according to background information in the article. However, higher intraocular pressure has been reported during the Valsalva maneuver, in which air is forced against a closed windpipe and pressure increases in the chest. This action occurs during coughing, vomiting, playing wind instruments and sometimes weightlifting.
During the first round of exercise, intraocular pressure increased in 27 (90 percent) of the participants, by an average of 4.3 millimeters of mercury. During the second round, pressure increased in 18 (62 percent) of weightlifters by an average of 2.2 millimeters of mercury. The increased pressure could be due to the Valsalva maneuver or a similar motion performed during bench presses; the even higher pressure during the first repetitions "may be due to greater intrathoracic [chest] pressure caused by the air retained in the lungs when the subjects held their breath during intraocular pressure measurement," the authors write.
The authors note that a certain type of glaucoma (normal-tension glaucoma) is more common in individuals who are subjected to frequent changes in eye pressure. "Prolonged weightlifting could be a potential risk factor for the development or progression of glaucoma. Intermittent intraocular pressure increases during weightlifting should be suspected in patients with normal-tension glaucoma who perform such exercises," they conclude. "Patients with normal-tension glaucoma should be questioned as to a history of regular weightlifting."
JAMA and Archives Journals
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