Thanks to wearable fitness equipment, completing a workout doesn’t quite feel like the accomplishment it is unless it was tracked on your device. Take this OP, for example, who finished their fitness routine only to realize that they forgot to click start on their Fitbit. Somehow, that made them feel like their whole workout was meaningless.
It may sound silly but we do get where they’re coming from. For future reference, you can just start the workout whenever you realize this and stop it on time. Afterward, you can adjust the start and stop time in the app and you’ll get all the credit you deserve!