I noticed an old bint on the treadmill at our gym the other day hanging on for grim death with a machine on quite an incline.

Tonight I thought I would see how steep they go. The answer was 15% which I think is between 1:6 & 1:7. It was rather steep as I batted along at 10 kph, I do not think I could have kept it up for very long.

Does anyone do any hill reps on one?