Bodyblade® one of the most simple core-strengthening tools you will ever use. Simply grab the handle and shake the blade! Your body does the work as it counteracts the force of the blade tips, bowing back and forth. This flexing at precisely 4.5 Hz is a key engineering feat that uses Newton’s laws of inertia to contract and release your muscles at hundreds of cycles per minute. Bodyblade® is easy to use for everyone, from the elderly to professional athletes. The blade works on your terms, and because you aren’t adding external weight, you get out what you put in—keeping the workout in line with your abilities one of the most simple core-strengthening tools you will ever use. Simply grab the handle and shake the blade! Your body does the work as it counteracts the force of the blade tips, bowing back and forth. This flexing at precisely 4.5 Hz is a key engineering feat that uses Newton’s laws of inertia to contract and release your muscles at hundreds of cycles per minute. Bodyblade® is easy to use for everyone, from the elderly to professional athletes. The blade works on your terms, and because you aren’t adding external weight, you get out what you put in—keeping the workout in line with your abilities.