Lori,
Me, too ... As one of the more "mature" veterans around here (I'm 48 and have been doing Cathe tapes almost exclusively since 1996) and one who has twingy, creaky knees, I really feel a need to chime in and agree with Wendyloo.
Lori, there have been way too many times in the past when I have, frankly, left my common sense and inner voice at the door, ignoring them in my desire to keep up with Forum members or my desire to do a "scheduled" Cathe workout. I would work gingerly but determinedly on sore knees, and end up paying for it by not being able to do ANY impact work for a couple of weeks. I'm not doing that anymore, but the price I'm permanently paying for having been kinda bull-headed is that I can't run, I can't comfortably play tennis or anything like that which calls upon a lot of lateral knee movement, I can't do leg strength work with a heavy-enough barbell so it's tough to challenge my legs, and I can't do really high impact like hi-lo aerobics or high-propulsion step more than once or twice a week. Believe me, if I had it to do over again, I'd have been pampering my knees for the last five years instead of the last year.
I'd love to see you proceeding more cautiously than I did, Lori, and take better care of your knee. Wendyloo's right, I think, in suggesting that yesterday's workout was dangerously close to overkill, especially because your knee is sending out warning signals. Please listen to your body, as our guru says.
You know, it's obvious that you're already in phenomenal shape, and really, 5 to 8 pounds is not a lot of weight to lose. I would LOVE it if, between now and that wedding in October, instead of focusing on losing 5 to 8 pounds you would just relax and give yourself permission to ignore the number on the scale, eat sensibly, rest, drink lots of water and exercise sensibly (perhaps with a little focus on endurance weight work, which it seems often helps Forum members achieve that "cut" upper body look -- like Marlene's famous Tank Top Rotation).
I hope none of this offends you -- my intention really and truly is only to encourage you NOT to make the mistake I made and am paying for with my crummy knees. I hope you'll take my comments in that spirit.
By the way, I am doing the September rotation and am substituting time on my knee-friendly elliptical trainer wherever Cathe suggests a run. Just my two cents' worth, in case you happen to have a bike or elliptical available to sub in for some of that ultra-high impact work.
http://www.clicksmilie.de/sammlung/sport/sport003.gif Kathy S.