I do this as well, and I have put some weights in a backpack, and I wear that while I'm mowing the lawn or picking up dog poop, etc. Really raises the difficult

I do this as well, and I have put some weights in a backpack, and I wear that while I'm mowing the lawn or picking up dog poop, etc. Really raises the difficulty level and ensures that my heartrate goes up sufficiently. Right now I have between 35 and 40 pounds of weights in my backpack.