Need more cardio or not?

Have not been joining any classes other than BP for the pass three weeks or so. Before the mentioned few weeks, I've been joining my favorite step class but due to work schedule, I've missed that class for a month now. I MUST make it to Maxis this Tuesday!

So I think I might not have sufficient cardio workout, and perhaps that's why my waistline is expanding. I can almost see my face expanding as well!!! Arghhh...

I've tried to at least get myself on the cardio machines before classes on Monday and Thursday, and on Tuesdays since I didn't go to my usual step classes. And the Cardio Wave machine had been my favorite so far, I found that I could sweat a lot, and according to the machine, the calories burnt was quite okay. But, I've got this nagging knee discomfort lately and I suspected that it might be too much of floating on the wave machine.

Spoke to Hobbes on Saturday when I went to his BP and he said it could be since our knees are not suppose to me moving at such direction (side ways) and me with the track record of having knee pains by even doing BJ, would most probably suffer knee pains from the cardio wave machine. Plus, I might be moving my knees in an incorrect way, suggested by PT.

So, maybe it's time to examine my gym timetable? Perhaps I should change my Thursday pump into a cardio class? Considering RPM? haha...

But after checking timetable, and asking for a few advice, PT said "Go wit pump. At least u can work all ur muscle in once."

Pump it is then.