Gyro Grip Trainer

A hand-held gyroscope that works your grip, wrists and forearms. Inside the clear shell is a heavy spinning rotor. Get it spinning, then make small circles with your wrist to keep it going. The faster it spins, the harder it pulls against your hand, so you control the workout just by how fast you go.

How to use it

• Start it: roll the rotor with your thumb to get it spinning
• Keep it going: hold it in your palm and make small, steady wrist circles
• Go harder: speed up your wrist circles and the resistance climbs

Why it's good

• Resistance builds up to the feel of about 35 lb of free weight, with no heavy weights
• Smooth, low-impact movement that's easy on the joints
• Good for climbers, lifters, golfers, tennis players, gamers and desk workers
• Fits in your palm, so you can use it at your desk, on the couch or in your bag