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The SKLZ ® Chrome performance training line elevates athleticism for the elite. The SKLZ ® Chrome SpeedSac Pro works to improve stride length, acceleration and speed. Features four weight bags, each holding up to 10 lbs of sand. Use the bags during lunge walks for additional hamstring and quadriceps strengthening.
Strengthen lower-body muscle groups to boost acceleration and stride length
Includes four durable weight bags that hold up to 10 lbs of sand each (sand not included)
Adjust weight options for variable resistance to promote proper running form
Recommended for multi-sport training
Double buckle attachment minimizes swaying
Extra-long bag increases drag coefficient
Heavy-duty adjustable leash accommodates athletes of all sizes
For both indoor and outdoor use
Country Of Origin: China
SKLZ Chrome SpeedSac Pro
THIS STUFF IS CRAZY
it help me out in baseball and now i have a 11 percent avrage of getting out at first
February 18, 2012