The fourth workout of this seasons CrossFit Open has been announced, and our first piece of advice for 20.4 is this: start and . You'll be doing box jumps, single-leg squats, and clean and jerks.

Feel like you've heard friends raving about CrossFit but still unsure as to what the workout, well, actually is? Don't worry - you're not alone. Despite it exploding in popularity over the past few ...