You don't need to exercise every day to be healthy! You can do all your exercise on the weekend and still feel really strong and healthy.
Scientists found that people who do all their exercise on the weekend are less likely to get sick than people who don't exercise at all.
It doesn't matter how you exercise, as long as you get enough! You can run, jump, dance, or play games - it's all good!
So, if you're busy during the week, don't worry! Just make sure you get your exercise in on the weekend and you'll be just fine.