You don’t need two hours. Two hours is great if you have it, but most students don’t. What you need is however much time you can actually stick to moving decently for. That’s it.

Whether that’s 20 minutes, 30 minutes, or longer doesn’t matter. Your workouts will be more effective if you simply show up day after day than if you go crazy once every few days.

Keep your workouts short so you can stay consistent. Short workouts are much easier to commit to. Scheduling an hour to hang out at the gym might sound like a good idea, but squeezing in 30 minutes between classes, before work, or in the middle of the night is far more realistic. And honestly, those 30 minutes add up.

Find small ways to move every day. You don’t need access to a gym or a huge chunk of time. Do a quick workout from your dorm room or apartment with no equipment. Go for a walk or jog. Hit some bodyweight exercises like push-ups, squats, and plank marches. Every little bit you do helps you get (and stay) healthier.

Short workouts will also help you build consistency. If you tell yourself you’re going to bike for two hours, you’ll probably talk yourself out of it. But if you’re going to give yourself 20 minutes, you’re probably going to do it. The more often you show up for your workouts, the stronger your willpower will get. You’ll start seeing fitness as a habit instead of a chore. Once you realize you don’t have to go hard every time you exercise, you’ll start getting excited to work out—even on your busiest days.