In the snaps, the actor, 50, put his buff tattooed biceps and chiseled abs on display while standing ... "That was one of the most challenging things I ever did. Recorded it all in there with ...
Grab a weight plate—between 10 and 25 pounds should work for most guys—and hold it in both hands behind your head. Squeeze your abs and curl forward until your upper back is off of the ground.