Hi, John (@johnbishop). I've even thought that it may be nothing more than I've a finite number of steps that my feet and legs are able to take in a day, and if I exceed that finite number, I'm fated to have a wobbly late afternoon and evening. Today: case in point. This morning I had my weekly PT session with Adam, my therapist; Adam, who's working hard to restore my leg strength, always leaves solidly rung out, but it's that good kind of "rung out:" the after-effect powerpacked workout. A few hours after, I drove my partner to her Wednesday chemo treatment; that's something I do every day for seven days straight (until she has three weeks off from chemo). The whole hospital experience leaves me bushed: a long, long walk from where I'm able to park, followed by a couple of hours trodding a hospital's faux marble floors (I do sit, but I get antsy and need to pace about). All-in-all, a day like today has me thinking, "Ray, go easy! You've only got two city blocks … or a half-mile … or 37,000 steps (I wish!) in these legs of yours. So, go easy!" (Ah, the joys of PN! 🙂 ) –Ray (@ray666)