RE: Do you play any sports for cardio???
I do both. I play football about once a week and that's probably better than my cardio workout because we play for like 3 sometimes 4 hours until we can't even walk properly anymore.I also go to a boxing class at my gym which is a really tough fitness test. It's much easier to push yourself hard when someone is motivating you. I'm also a martial artist and in my Taekwondo class we do a lot of cardio.
I go on the treadmill like 3 or 4 times a week. I don't find it enjoyable but I don't really find it boring either. When i'm on the treadmill I usually think of something else happening in my life while running and this helps the time pass quickly. What is important is not to really concentrate on the time during the whole run as this will make it very boring and tiring.