It depends on your goals. If your goal is fat loss and you want to create a weekly calorie deficit, you can reduce carbs on your training days to bring your overall calories down a bit. If you're maintaining your weight, focusing on performance or trying to put on muscle, there's no need to eat low-carb. I would recommend eating a moderate amount of carbs coming from low-sugar sources such as non-starchy veggies, starchy veggies and some whole grains, legumes and fruit.