Kickboxing... more like kickmybuttboxing.
Ten minutes into the class and I'm already huffing and puffing like a fat man walking up a flight of stairs. I've been taking 2 hour long classes a week for about 2 months now, and I have yet to improve my lung capacity and push up endurance. After one cheating push-up (knees bent) my arms are already shaking on the next. My upper body strength is the same now as when I was 5 years old. Despite my workout habits, my eating habits have not changed one bit. I still enjoy my loads of white simple carbs and sugary beverages. Perhaps this is the reason why it takes me 15 minutes to walk up the three block hill near my house (which I've been walking up for 17 years). I wasn't made to be fit.