Stair climb machine 25:00 [3]
shoes: NB Vazee blue #2 - at work
on aerobic mode. level 20 - was aiming for 30 min, but was wiped out after 25.
It took me a bit to get my breath afterwards, which interestingly, is never a problem with running. Guess it shows the limit I hit in the optimization function in running is related to leg strength rather than lung strength.