@misc{10481/98965,
year = {2020},
url = {https://hdl.handle.net/10481/98965},
abstract = {Abstract
Importance: Intraocular pressure (IOP) is sensitive to caffeine intake and physical exercise. However, the combined effect of caffeine intake and physical exercise on IOP levels remains unknown.
Background: We aimed to assess the effects of caffeine consumption before exercise on the IOP behaviour during low-intensity endurance exercise.
Design: A placebo-controlled, double-blind, balanced crossover study at the University of Granada.
Participants: Eighteen physically active young adults (age = 23.3 ± 2.4 years)
participated in this study.
Methods: Participants performed 30 minutes of cycling at 10% of maximal power production after 30 minutes of ingesting a capsule of caffeine (~4 mg/kg) and placebo in two different days and following a double-blind procedure.
Main Outcome Measure: IOP was measured at baseline (before caffeine/placebo ingestion), after 5 minutes of warm-up, during cycling (6, 12, 18, 24 and 30 minutes) and recovery (5 and 10 minutes) by rebound tonometry.
Results: There was a significant effect of caffeine consumption (P < .001, η2 = 0.50), showing that the ingestion of caffeine before exercise counteracted the IOP-lowering response to low-intensity endurance exercise. Greater IOP values at 12, 18, 24 and 30 minutes (corrected P-values<.05, ds = 0.90-1.08) of cycling were observed for the caffeine in comparison to the placebo condition.
Conclusions and Relevance: The ingestion of caffeine (~4 mg/kg) 30 minutes before performing low-intensity endurance exercise counteracts the IOP-lowering effect of low-intensity exercise. These results highlight that the ingestion of a considerable amount of caffeine before exercise should be discouraged for individuals who would benefit from the IOP reduction associated with low-intensity exercise (ie, glaucoma patients or those at risk).},
organization = {Grupo de investigación de Óptica FQM-151},
publisher = {Wiley},
keywords = {caffeine},
keywords = {glaucoma management},
keywords = {glaucoma prevention},
keywords = {ocular hypertension},
keywords = {physical exercise},
keywords = {rebound tonometry},
title = {Effects of caffeine consumption on intraocular pressure during low‐intensity endurance exercise: A placebo‐controlled, double‐blind, balanced crossover study.},
author = {Vera Vílchez, Jesús and Redondo Cabrera, Beatriz and Bardón, Anabel and Pérez Castilla, Alejandro and García Ramos, Amador and Jiménez Rodríguez, Raimundo},
}