“You’ll know immediately if your workout is too hard or too easy.”
have sensors that detect movement and indicate how much force, power and speed are being generated with each repetition of an exercise. The companies also sell accessories such as belts and vests that you wear to track e ort for plyometric exercises like box jumps.
Another VBT device is Bar Sensei ($ 395, assess2perform.com), though it’s limited to barbell exercises. The same company also developed a group of medicine balls – known as Ballistic Balls ($395 each) – that have sensors inside that measure e ort when throwing them.
The goal, Shear says, is to move weights or perform exercises at a velocity range of one metre to 1½ metres per second. Move faster, and you’re not training hard enough, so you need to increase the load. Move slower, and you’re overloading – working with too much weight – and probably not improving your power output.
“Some days you can lift heavier weights than others, making it hard to know if you’re training in the optimal range,” Shear says. “But VBT is self-regulating.You’ll know immediately if your workout is too hard or too easy.” –