There’s no need to do crunches for an hour. If you want washboard abs, go for quality, not quantity. Incorporating the right moves into your workout will give you better, quicker results.... Double Unders in Crossfit
Most CrossFitters out there may disagree with the statement that double unders are as easy as air squats. But think about it for a minute. Double unders do not require a tremendous amount of strength. One only needs to hold 4 ounce handles in their hands and rotate a 3 ounce jump rope around their... 







