> My tuck jumps aren't very pretty, but I
>do the best I can.
>Just Do It!
I have "tuckless" tuck jumps! My body is just NOT a fast-twitch machine!
As for what workouts suit your age, as others have said, it's not so much age as your physical condition and limitations.
I find that Cathe cardio workouts are much kinder to my 48-year-old body if I limit the number of turn moves. I've even started to eliminate pivots, which can add a risk of torque that I don't want on my knees, and do mambos instead. And ricochet moves? Forget about 'em! I just find my own substitution (for example, an "over the top, touch the outside foot down, return to first side, jack" move is my standard sub for the ricochet: takes the same number of counts and I end up in the same place Cathe and crew are at.) Most turn moves done over the step (like flying angels) can be done without a turn. If you do the same number of reps Cathe does, but facing forward, eventually, she and the crew will be in the same place you are (and vice-versa!).
Impact is another factor, though I personally find it less of a problem than torque (except for what I consider excessive and unnecessary impact for me in IMAX3--jumping from the step to the floor. For someone who can land that move lightly, it might not dn't be too much, but I can't).
Another factor to consider is choreography: will you be able to follow the moves? For that, I recommend workouts preceding the Body Blast series, when Cathe's cuing was easier to follow, IMO, and more on-spot, and the moves a bit less complex. I find that the step workouts in the HC series are sometimes not cued as well as some previous workouts. Like there is more shorthand used and assumption of familiarity with moves that have been used throughout her previous workouts.
For resistance workouts, they are pretty much adaptable to differnt levels by using lighter or heavier weights. You can also omit some sets as you first do the workouts. One concern is the relative risk/benefit ratio of some moves. And if you don't have some background in reading up on weight training, you might not be in a good position to decide which moves you want to modify or omit. In Bodymax, for example (a workout I did a few weeks ago), there are some back rows done from an exaggerated bent-over position, which I find to have less benefit than risk, so I don't do that position. Upright rows are another exercise that I don't do. nor would I do delt raises with the pinky up, as Cathe cues in one workout. I base my decisions on my readings of several dozen books on weight traniing, many by kinesiologists and PhD's or other specialists (Douglas Brooks is excellent), my own experience from working out for many years, and the past injuries I have to contend with (which have shown me the areas I have to be careful with, noteably left knee and right shoulder.