Of course! As long as you have burned off more calories than you are replacing! But it is purely a personal choice. I stick to the same amount of daily calories, regardless of how many I have burned off running, riding and poo-picking my horses' field. I just think that the more I have burned off, the quicker the weight will come off. But life without treats is boring and you may find that you indulge and then feel like you have wasted all that effort. You won't know unless you try though....