Soon-to-turn-pro Lewis Sylvester demonstrates Head Ball, which his trainer Billy Dawson describes as 'A warm-up for the brain.'<br /><br />Subscribe for updates - http://goo.gl/meA2GB<br />More boxing news 24/7: http://goo.gl/aJFtws<br />Follow on Twitter: http://goo.gl/VDYVMP<br />Like on Facebook: http://goo.gl/mI5B64<br /><br />SecondsOut is a world leader in boxing entertainment since 1999.<br /><br />Part of the Knockout TV YouTube MCN - http://goo.gl/t77GMc
