Hello, I'm Jaeho, a trainer and physical therapist. Today, I've prepared a 20-minute full-body workout routine for beginners at level 1. The routine primarily consists of lower-body and upper-body exercises, each performed for 40 seconds. In between, there are core exercises and 20-second rest periods to allow your lower and upper body muscles to recover. If you want to burn more calories and increase muscle mass, you can add resistance with dumbbells or kettlebells. I also highly recommend gradually increasing the resistance using equipment. If you have access to a pull-up bar, I strongly suggest replacing the back exercise with pull-ups. Alternatively, if you have dumbbells, you can do dumbbell rows instead.