- Joined
- Apr 30, 2005
- Messages
- 42,064
I am doing 20 mins now on the 15% incline and I definitely notice this clocks up far more calories than just speed. I tend to do this incline with a speed of about 5.5 - 5.8 mph, which is probably not quite as fast as a professional gym treadmill but quite brisk. I also hang onto the sidebars as I feel unsafe without them, ( not good balance with wonky spine) but maybe working without holding on makes it much harder work?