Shake Weight
We’re all about toned arms and a toned body, but it’s the effort that must go into getting toned that we shy away from. The handheld weight is one of those weird inventions that feels like it’s something from the future. Invented by Johann Verheem, over 4 million have already been sold since it first hit the market. Using the Shake Weight is simple, all you do is hold the weight with both hands as it pulses back and forth (The Ledger).