We’ve seen Pittsburgh Steeler linebacker, James Harrison pull, press, and drag big weight to strengthen his lower and upper body. Now the Pro-Bowler is going after his midsection with a barrage of core-chiseling, windshield wipers. Harrison recently shared a quick glimpse of his abs strengthening routine with this Instagram clip.

Does the All-Pro linebacker have a physical weakness? If so, we have yet to see it, which can’t be too reassuring for the running backs who will be clashing with him this upcoming season.