Increase Speed, Strength, and Agility/Speed Bandz are an explosive training tool utilized to help increase speed, core strength and sport specific quickness by training with optimal muscle activation. Improve your 40yd, 60yd, 5-10-5 dash and shatter your previous achievements.Pro Bandz can also be used to make your workouts more intense! You can attach Velcro attachments to ankles, knees, or wrist to create a incredibly versatile workout! Velcro attachments can be clipped into using your Pro Bandz and Boardz for ankle and wrist attachments. Increasing your heart rate and toning your legs through each resisted movement you will find better balance, functional strength and stamina.