@madscientistofmuscle: My new favorite treadmill exercise... two-fisted Heavy Cup Carrying :) I've got the original 22 lb Heavy Cup mug from @The Heavy Cup | 22lb Mug in one hand and their 10 lb tumbler in the other. Just don't do what I accidentally did...(you’ll see). If you want one of these tumblers, you can use code MADSCIENTIST to get 10% off. TheHeavyCup.com is the site where you can go get one. #heavycup #theheavycup #heavycupchallenge #ad #heavytumbler