carbs should still make up 50-60% of your diet. If your doing high intensity cardio you'll need carbs anyway. Just the right ones. Ideally you need to be eating 50% Carbs, 25% protein and 25% good fats.
Idea is to use stored fat as fuel, up protein to compensate 4 muscle loss in a calorie defecit and up fat for cals.
No point taking shit loads of carbs in while trying to cut down, up protein+ fats, use stored carbs as ur energy source.
i did a 6 week keto diet ( 0 carbs) with only 2 refeeds and completed 3 25 min hiit sessions a week with only an energy cns stim (caffine) before each wo.