Over 2,000 vertical feet on the treadmill
Earlier this spring I was riding my bicycle almost thirty miles a day in Alaska, when I ran into a few health problems that slowed me down. About three weeks ago I finally got back on a treadmill after my move to Colorado, and now I’m glad to say that yesterday I climbed over 2,000 vertical feet on the treadmill yesterday:

The important “note to self” here is that three weeks ago I was in no shape to do this, and my heart rate would go up to 130 beats per minute just touching the treadmill, but yesterday it took a lot of work to get my heart rate over the 130 BPM mark.
The note to self is this: You can feel much better, and be much healthier, with only three weeks of exercise.
P.S. - My heart rate wasn’t really 191 BPM. That’s just what the machine defaults to when your hands aren’t on the grips.