International journal of sport nutrition and exercise metabolism · 2026
Fuel Doesn't Fix It: Oculomotor Control Declines During 3 Hr of Exercise Irrespective of Carbohydrate Availability.
СтатьяНазвание и аннотация: Перевод в очереди
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
Connell Charlotte J W, Duncan Shelley, Black Joanna M, Kuhn Gustav, Thompson Benjamin, Gant Nicholas
Аннотация
PURPOSE: This study investigates whether carbohydrate supplementation during 3 hr of cycling attenuates postexercise changes in oculomotor control and visual performance.
METHODS: Within a double-blind, randomized, placebo-controlled, repeated-measures, crossover design, nine healthy males completed two 180-min cycling trials at 60% of maximal aerobic capacity, ingesting either a carbohydrate (0.7 g·kg-1·hr-1) or placebo solution. Saccadic eye movements (rapid, ballistic gaze shifts used to redirect the fovea to targets of interest), visual acuity, binocular function, and global motion perception were assessed before and after exercise. Heart rate, perceived exertion, blood glucose, and serum insulin levels were monitored throughout exercise.
RESULTS: Blood glucose diverged significantly between conditions across the 180-min exercise protocol, reaching hypoglycemic levels (<4 mmol/L) in placebo from 150 min (placebo: 3.2 ± 0.4 vs. carbohydrate: 5.2 ± 0.7 mmol/L at 180 min). Postexercise saccade velocity, amplitude, and latency changed equivalently across both conditions (-13% velocity, -1° amplitude, +25-ms latency; all p < .01). Visual attention, global motion perception, visual acuity, and binocular function were unchanged by exercise or intervention.
CONCLUSION: Postexercise reductions in saccade velocity and amplitude, and increased latency, were observed regardless of glycemic state, reflecting impaired oculomotor output independent of carbohydrate availability, while visual performance was preserved. These findings point toward a centrally mediated neural mechanism rather than carbohydrate substrate limitation.
METHODS: Within a double-blind, randomized, placebo-controlled, repeated-measures, crossover design, nine healthy males completed two 180-min cycling trials at 60% of maximal aerobic capacity, ingesting either a carbohydrate (0.7 g·kg-1·hr-1) or placebo solution. Saccadic eye movements (rapid, ballistic gaze shifts used to redirect the fovea to targets of interest), visual acuity, binocular function, and global motion perception were assessed before and after exercise. Heart rate, perceived exertion, blood glucose, and serum insulin levels were monitored throughout exercise.
RESULTS: Blood glucose diverged significantly between conditions across the 180-min exercise protocol, reaching hypoglycemic levels (<4 mmol/L) in placebo from 150 min (placebo: 3.2 ± 0.4 vs. carbohydrate: 5.2 ± 0.7 mmol/L at 180 min). Postexercise saccade velocity, amplitude, and latency changed equivalently across both conditions (-13% velocity, -1° amplitude, +25-ms latency; all p < .01). Visual attention, global motion perception, visual acuity, and binocular function were unchanged by exercise or intervention.
CONCLUSION: Postexercise reductions in saccade velocity and amplitude, and increased latency, were observed regardless of glycemic state, reflecting impaired oculomotor output independent of carbohydrate availability, while visual performance was preserved. These findings point toward a centrally mediated neural mechanism rather than carbohydrate substrate limitation.