Great video, respect.
I didn't know he deadslifts 700lbs, pretty amazing. My boy did 725 recently but he's bigger still, anyone doing 700... frickin epic.. i can only dream of that maybe 5 years from now haha...
Personally i do 4-5mph on a 4 to 15 incline for an hour... that probably burns a hell lot more than either methods.. thats what i do..
Saves my knees and ankles.. while sprints i can sprint fast and i know its effective... but my knees hate me day in day out
The treadmills also feel like they are going to fail apart when i sprint above 10mph... feels unsafe lol.