There is of course the 40-minute climb of Thin Air (remember when I did that standing the whole time during my Knighthood? Damn I was strong then…)
Then there is:
- 16 intervals of Downward Spiral (not including bonus sprints);
- 15 intervals of Revolver (you know…); and
- 9 intervals of Nine Hammers (or TINT)
Which add up to 40 (ish)
Probably many other options. I’m a sad old sack of crap now, but I’ve got to mark the occasion somehow!