Wrist Trainer Ball Auto-Start Gyroscopic Forearm Exerciser Gyro Ball for Strengthen Arms, Fingers, Bones and Muscles

This not for building muscle. But it will aid in recovery. I can see where some wrist and grip strength will increase, but this is primarily a recovery/traing tool. It should increase blood flow and that's a good thing. Seems well made, so time will tell. Pretty easy to get going.

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.

Easy to get started, was able to get it working the first time. Pretty fun to use, good work out for your forearms. I ordered one with the light, but alas, no light, so that's disappointing and the reason for only four stars.

I got this to help with my sore wrist since I am on the computer all the time. It takes a little time to get used to. At first, it wasn't lighting up, but I later learned it was because I wasn't moving my wrist in the right way to maintain the momentum. It needs the right kind of wrist action to keep the gyroscope moving and light the lights.I did a quick search on YouTube.com and found great instructions on how to use it.This is a great workout for the wrist, and it helps me overcome overuse from typing or using my mouse.It's also a lot of fun in general! Never hurts to have fun when you're exercising!

Fun product that is also useful. Love the way it lights up when you get it going. Great therapy tool for both me and my husband. Which is probably why I purchased two as adults don't share toys either. Lol

When I first got my wrist ball, I was convinced, after about 10 minutes of working at it, that mine was defective. It just wouldn't spin. I tried watching a YouTube video, copying the movements...nope. So I tried another video, and another, and another and FINALLY found a video where the person explained it just right, and by golly that ball came alive in my hand! Now I play with it daily, I love the lights, the movement, and the way the ball seems to get heavier the faster it spins. I am 72.

I guess it does it's job. I am having a little trouble getting it to perform properly. On a few occasions I have got it to "work" but most of the time it doesn't work right. This may be operator error so I will keep trying.

The media could not be loaded. Most complaints on this product are about starting. I think this is either user error or defective units. I'm glad I got the version with LEDs, because it's a good indicator of the speed that helped me learn to start it.The mechanism for starting it is simple. There is a spring that needs to engage, then you wind it and let go. The spring won't engage in all positions. For example, if you put it vertical with the arrows pointing up it never engages. Horizontal as in the instructions, or vertical with the arrows pointing down, it works fine.If when you release the wheel the LEDs don't turn on, or barely do, the winding was not enough. They have to turn on in bright multicolor and you know you got it right. Then it's a matter of learning how to move it to get it to rev faster, basically by opposing its movement.I did touch the spinning wheel multiple times, usually on purpose to stop it. It can hurt if you get your skin pinched, but I don't think it can cause an injury. This is however a downside and hence 4 stars instead of 5. I think it's safe for me, but I would not give it to my kids.