If you review my ERFL log I completed it. I used minor inclines at times and it gave my hamstrings an overworked, overstretched feeling (made worse by APT I suffer from) and reduced the amount of overall cardio I was able to do.
I would DEFINITELY not try this on a steep incline. You are just asking for injury.
Also, I wouldn't just start ERFL out of nowhere. I had been doing TONS of walking on almost a daily basis for months before I did my 4 days in the Valley
My Wild Ride to A great body in my 30s.
Thank you Lyle. This website is a game changer once you understand the mechanisms behind fat loss/muscle gain.
Spun my wheels for years prior to finding this site.