JIN BD Auto-Start Wrist Trainer Ball - Gyroscopic Forearm Exerciser for Strengthening Arms, Fingers, Wrist Bones and Muscles

Good for strength building, durable and value

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Ótimo pra treinar a força do pulso e antebraço!

Vale muito a pena

It's a fun little exercise ball and it will work your forearm. The lights the ball produces when it spins are entertaining but much more so at night and/or in a dimly lit room, in a bright room the lights are barely noticeable. The instructions that came with the ball are a little vague, I ended up going to the online Google video to see how to get this ball started. Many years ago I had a Dyna-flex exerciser (I probably still do in a junk and clutter box somewhere in my house) and without reading the instructions I tried to start this ball the old Dyna-flex way, every attempt failed. I then tried reading the instructions that came with the ball, they were vague and unhelpful. I watched the video on how to start the ball which was very helpful but left out the first step. First, place the ball in the hand which you plan to exercise or to get the ball started. This will help you to get the right feel for the ball, if you wait until after the ball tries to start spinning to figure out your hand placement the inner gyroscope ball will lose all momentum as you are trying to figure it out. Second, place both thumbs on the arrows on the ball. One thumb at a time, push down and forward on the ball, alternate walking the ball in the direction of the arrows with your thumbs. In a very short time you will begin to feel tension building up on the ball, push a little further until the ball feels like it wants to spin back against you. Hold the ball in place with one thumb while you find your grip with the hand you plan to exercise. Once your working hand is in place release your thumb hold on the ball and begin working your wrist, you will know within a few seconds if the inner gyroscope ball has been activated. It took me four attempts to get this ball started the first time, it hasn't taken more than two attempts since.