Shake Weight Pro. The "smart" d******* just got smarter! Introducing the NEWEST funnest way to shake and tone your arms, shoulders and chest! It provides the same, fun effective workout as the original, but this time around, it has adjustable resistance to increase intensity with a mere twist of your hands. Your muscles will contract up to 240 times a minutes for fast results in just six minutes a day! Available in Men's and Women's sizes, it's the smart, effective way to shake up your fitness routine! State Men's or Women's. Order yours today! Shake Weight Pro Men's Weighs 5 lbs., measures 15" l. Women's Weighs 3 lbs., measures 13"l.