Currently trying to alternate running with an exercise bike while sitting. 8 or so minutes easy followed by a minute or two hard for each. Plus at least once a week on the elliptical with a 60 pound pack. This keeps my back good. I think Lendl had the right idea with the biking. If you sit it gets that ROM that aerobic running misses. But Lendl hurt his back. Thus the 60 pound pack. I'm finally able to sleep on my stomach lately. It's been such a long road back. So many years. Strange that a back can continue to "heal" 10 years after the injury. But not actual healing. Just a matter of strengthening to keep everything in place.

But only getting to do aerobic stuff maybe 3 days a week. Plus tennis once or twice.

Back hasn't hurt at all the last few weeks. It used to wake me up at 2 to 4 AM from pain. Hasn't done that in a year or two. But more recently sometimes it would hurt when running (the slight twisting motion) but that was related to trying to pull something towards me with one hand. (Disney spin ride, one arm rows). But still it would often just be very stiff. Like after driving to work, couldn't straighten out very well when first standing.

Last few weeks not even any stiffness. Best it has been in years. Not sure why. We do have this new mattress, but we've had it for maybe close to 6 months...? It seems to mostly coincide with doing longer running intervals (5/4's) but that doesn't really make sense to me.... Only other thing I can think of is that I've been doing some shadow boxing.

So last night slept in the guest room on standard mattress. Back felt fine. Don't want to take this for granted.