I bought a 40# weight vest to hike with. I started with 20# on a trail that goes up 1600 feet in 1.8 miles. I try and walk up at a fast pace and jog down. I did it a few times (it kicked my but). Then work got real busy and haven't had a chance to get back out. I'm probably in the worst shape I've been in for a few years. I have the weeks left, going to try the tail again at last the times a week and hope it helps.
I'd hold off on jogging with that much weight, just my two cents.
I used to do that for military training and my knees and ankles are starting to have some issues... at age 29.
Not saying to stop training, just saying that if I could do it again, I'd jog with 10lbs max and ruck with 70-100lbs regularly (with good shoes or boots)
Curtis