"For example, they were asked whether they preferred $10 now or $50 in six months," said study author Bastien Blain, a research associate at University College London. "And those who overtrained were more likely to choose the immediate reward, which is interesting."
RELATED: How To Tell If You're Overtraining
The study reiterates how the brain plays a major role in your training and pushing it to burnout point will not only affect your capacity to continue exercising, but your ability to make healthy choices long after you stop.
"Cognitive control in this situation is the capacity to maintain exercise despite things like muscle pain," Blain explained. "And what we found is there is an intellectual component involved in exercising and it has a finite capacity. You cannot use it forever."
The findings could also explain why some elite athletes see their performance decline when they're working their hardest – a phenomenon known as overtraining syndrome.
Although us mere mortals cannot class ourselves as elite athletes, it's a good reminder to slow down and listen to your body instead of steamrolling through an intense workout when you're not feeling it.