Usable energy
Usable energy across an ordinary day.
Flat can mean the intention is there, but usable energy feels uneven. Meals, gaps between them and ordinary movement give this reading its context.

Usable energy across an ordinary day.
Response to meals and gaps between them.
The cost of light, ordinary activity.
The distinguishing clues cluster around meals, temperature and the cost of ordinary demand, rather than initiation or daily timing alone.