Can I send my 4.6 yr old son to swimming class and martial art back to back. He is 4 ft tall and 27kg body weight

A. Look the correct age to end your child to both the classes is about five years and back-to-back really would not make a sense because very honestly physical workouts and very very heavy workout basically also make you do workout like swinging your hands and legs and when it comes to Karate they make you do proper exercising and stretching the body cannot take so much so if you wanna do both the exercises for both activities and maintain a gap of at least 3 to 4 hours for one should be either in the morning or by 12 or one and the other should be like five or seven in the evening that would be much better