as they demonstrate that when the brain is ‘tired’ we may make choices that go even opposite to our own interest,” said Pietro Pietrini, coauthor of the paper and director of the Molecular ...

"This effect may lead to actually feeling more tired with more caffeine, due to adrenal gland burnout. The adrenals can only work so hard before they are no longer able to keep increasing cortisol ...

Dramatic comeback wins in AFC North clashes take a lot of work, and Lamar Jackson was tired after leading his Baltimore Ravens to a 35-34 victory over the Cincinnati Bengals on Thursday.

Lack of quality sleep could also be to blame. The NHS website offers advice for those who feel "tired all the time": "Before you see a GP, you may want to work out how you became tired in the ...