20 Yard Shuttle Run

we test it in the above mentioned way and calculate it the same. we use this as a drill station during our agility phase. once a week we like to "mix" it up by having the players use some dexterity in the shuttle as well. sometimes we have them pick up a halfed tennis ball from the first line and drop it at the second line. sometimes they must pick up a second ball and finish with it. we will also add length to the drill by having them switch balls. we have painted some of the balls black. so, they must sprint right pick up a yellow ball, sprint left ...set yellow down & pick up black, sprint right...drop black, then finish back at start. we mix it up to get some "verbal processing" as well. command yellow-black........or black-yellow. this isn't the true 20 yard shuttle (it is longer) but it incorporates some other details we feel can have a positive impact in our athletes.......dexterity, listening skills, retention, execution of a plan, etc. for conditioning we might have 2 or 3 balls at each line and a bucket on each end. must place balls in the bucket. we like to incorporate some type of "hand" skills in many of our drills. like on the plyo boxes.....we throw a football to them at the peak of their jump off the last box. place a ball somewhere along the box cone drills we do and they must "scoop and score" within the drill. just some examples that we like to employ........not sure if true or not...but we like to think they help in some small way.