KICKBOXING! I'M BACK!!

I've stopped doing kickboxing for 3 months coz I have been so busy at work and also I'm kinda reluctant to do exercises during winter. Finally I restarted today!! It was good to kick and punch and vent my anger again but I was extremely tired and I got aching muscles afterwards. I need to improve my fitness and hopefully I can manage to do it twice a week!! I start to regret that I have stopped for such long time!!