Swiss Ball Stirs In Training, Tutorials, Uncategorized by Polina15/06/2015 A very nice exercise to train core strength and stability. Keep the lower back tight, abs tight, neck aligned straight with upper body. Start off from your knees, then if you’re bad ass, move onto your feet. I’m not quite there yet 🙂 Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on WhatsApp (Opens in new window) Related