An interesting (and fun) core workout on @KarmichaelD IG Story, using a medicine ball to play volleyball. Plus, moving in the sand pic.twitter.com/MX9P69X6wU
You learn something new every day. This workout was made famous by @jharrison9292 and the Pittsburgh Steelers, whose defensive line coach is Karl Dunbar Sr., the father of @KarmichaelDhttps://t.co/rwVTNXS1Lb