I always think it's better to not do the same type of workout (step, kickboxing, etc.) two days in a row, to avoid overtraining the same muscles and repetitive stress to the same joints and muscles. YMMV, but I'd do a different type of workout today. (Though if I had my druthers, there are times when I'd do kickboxing every day...or step every day....but I follow my own advice and don't;-) )