Cardio exercises at home

I'm working out at the gym like 2-3 times every week and also doing cardio exercises at home like 4-5 times a week. I'm in so good shape now, so good that I almost think it's perfect as it is now and I should stop training. But training is more than just a hobby and looking good, it's a lifestyle. Without training I get stressy and I don't sleep as good as I do after a workout.