"Wake up an hour earlier each morning"

Solution 1:

The following answer is drawn from comments provided at the time of the question being posted:

@McCaverty offers this advice:

"Unless it's an article called Counter-clockwise: The Astonishing Benefits of Sleep Deprivation, I think most people would assume it means just one hour earlier than normal going forward."

@FumbleFingers provides further insight:

"For many years I really did used to go to bed half an hour later every night - until eventually I'd find myself heading up the wooden hill by dawn's early light (at which point I'd revert to a more sensible bedtime, which would start slipping back again within days). But as @McCaverty says, that would be a perverse interpretation for OP's cited context."