There are many ways to do it. Prioritize your housework. Some things can wait another day or wait until your day off if necessary. Try to keep things straightened up when you are home instead of letting things pile up. While at work, stand up at your desk, stretch, and walk in place if you can’t leave your desk. During breaks, walk around the parking lot or even the office. Keep a bottle of water and some healthy snacks at your desk for those times when you can’t get away. You can also try to go to the gym before or after work (if that’s your thing). Keep work stuff at work and home stuff at home so that you don’t get mentally exhausted as easily.