Speed walking on incline

[Kpaxi]

I’ve done cardio for about 5 years. Took a break so to injury and got back into it recently. Speed walking on an steep incline for an hour going up speed every 3 miniuts was the hardest cardio of my life at the end. Much worse than jog/running. Felt better on joints too

 

[Logan44551]

That's all I do cardio wise. My knees can't handle running. It seems to burn just as many calories