Cross training for folks in their 70's+

Anyone else 70+ doing cross training?

At almost 76yo, I've been doing it for years - swimming, walking several miles, bicycling, resistance training, targeted stretching.

As far as resistance training, in addition to some more traditional activities, about a year ago I took up TRX, and do it a couple of times per week to a DVD. I also use stretch bands, do 90 second planks, full body dips, do traditional pushups - about 40 - 50 at a time, although I am working on 76 in a row for my 76th birthday (I did 75 last year, but life got in the way of my training for a bit this year, and I have fallen back). I am working on pullups, but they seem terrifically difficult for me. I can do about 3 and that is it!! I do other more "traditional" resistance exercises.

I generally swim 35-45 minutes and often combine it with a ride. Typical is an early morning workout, a ride of 20-30 miles and a swim.

I find that if I am not regular, I lose strength easily.

I think cross-training gets more and more important as we age.

So, how about you?