Your fitness app says you burned 600 calories on a run and offers them back as extra food. Eat them all and progress often stalls — here's why, and what to do instead.
If you set your activity level to anything above sedentary, your TDEE already includes your typical exercise. Eating back the calories an app or watch reports on top of that counts the same workout twice — first in the multiplier, then again as "earned" food. That's a common reason a deficit quietly disappears.
Wearables and cardio machines are notoriously generous with calorie burns — often by 20–50%. The "600 calories" may really be 350. Eating back an inflated number turns a planned deficit into maintenance without you noticing.
Pick an honest activity level that reflects your usual week including training, then eat at the resulting target every day — don't add food on workout days. Your calorie goal already bakes the exercise in. This also smooths intake instead of swinging between low rest-day and high training-day eating.
If you do something genuinely unusual — a long hike, a race, a big one-off effort well beyond your normal week — eating back a portion (say half, to allow for overestimation) is reasonable. The key is that it's the exception, not a daily habit, and you judge the result against your weight trend over weeks rather than trusting the app's number.
Usually not, if your activity level already reflects your training — that would double-count it. Wearable burns are also often overestimated by 20–50%.
Choose an activity multiplier that includes your typical weekly training, and eat at that target consistently. For unusual one-off efforts, eating back a portion is reasonable.