Link:: [Pubmed](https://pubmed.ncbi.nlm.nih.gov/36870101/) Pre-workouts bør tas 13 timer før leggetid: > To avoid reductions in total sleep time, coffee (107 mg per 250 mL) should be consumed at least 8.8 h prior to bedtime and a standard serve of pre-workout supplement (217.5 mg) should be consumed at least 13.2 h prior to bedtime.