Variant A: a low-glycemic plate—lean protein, colorful vegetables, olive oil, and a modest portion of complex carbs. Variant B: a higher-carb option anchored by whole grains or starchy vegetables, ideal on training days. Rate post-lunch alertness at thirty, sixty, and one hundred twenty minutes. Watch for drowsiness, snack urges, and irritability. Context matters: activity level, sleep debt, and morning routine can tilt results, so record those alongside outcomes.
Compare a handful of nuts with a piece of fruit against a protein-forward yogurt or shake of similar calories. Note whether cravings quiet down, how long satiety lasts, and whether focus survives calendar chaos. If both options work, favor the one that travels well and resists vending-machine temptation. Convenience isn’t trivial—it determines adherence, and adherence determines whether your data reflects real life instead of weekend-only optimism.
Test front-loading fluids before noon versus evenly distributed sips through evening. Keep total volume similar and include electrolytes only if previously tolerated. Track headaches, late-day energy, and nocturnal wake-ups. Overhydration near bedtime can sabotage sleep, while underhydration blunts afternoon clarity. The winning pattern is usually the simplest one that prevents thirst from sneaking up during long meetings or deep work, without sending you pacing to the kitchen every fifteen minutes.