Why sleep outranks everything else on the list
Narrative reviews and expert consensus work on sleep in athletes keep arriving at the same place. Sleep duration and quality are associated with performance, injury risk, mood and illness, athletes routinely get less than they need, and no intervention reliably replaces it.
On the floor it is obvious. The sessions that fall apart are almost never the ones where somebody skipped their electrolytes. They are the ones after a five-hour night.
Your caffeine cut-off is earlier than you think
A controlled study gave people caffeine at zero, three and six hours before bed and measured their sleep. Even the six-hour dose meaningfully reduced total sleep time, and the participants largely did not report noticing it. That last part is the useful bit. Feeling unaffected is not evidence of being unaffected.
If you go to bed at 10pm, that puts the last coffee around 3 or 4pm for many people. If your 5pm espresso is genuinely non-negotiable, that is your choice to make, but make it knowingly.
Should you eat before bed?
The blanket advice not to eat after a certain hour does not survive contact with people who train in the evening. Going to bed genuinely hungry after a hard session usually means worse sleep, and worse sleep costs more than a late meal ever did.
There is also a small positive case. Research on pre-sleep protein ingestion suggests a substantial serving before bed, often around forty grams of a slower-digesting protein such as casein, is digested and used overnight and can support the adaptive response to training.
The short list that actually works
- 1Pick a bedtime you can hold five nights out of seven. Regularity beats heroics.
- 2Set a caffeine cut-off around six hours before that bedtime.
- 3Keep the bedroom dark and cool enough that you are not kicking the duvet off at 3am.
- 4Treat alcohol as a sleep cost, because it is one, even when it helps you drop off.
- 5If you train late and cannot switch off afterwards, try moving one session a week earlier and see what happens.
For the sleep-specific tools we publish, including a structured way to rebuild your sleep opportunity, see the Recovery Hub.
