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!

Good value and great quality, works great to me.. super easy to use

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.

It's pronounced "jeye-roh" such that 'jeye' sounds like the 'J' in jump, and 'roh' sounds like the 'r' in run followed by 'oh' like the 'o' in nose.I was first introduced to the Dynabee -- the original maker of these gyro-type balls. I used it for a long time and it did great things for my forearms, my wrists, and my hands. And then I put it away and last week -- nearly 34 years later -- I ran across it in a drawer. Unfortunately, because of the internal accumulated dust, it didn't spin in the horizontal direction anymore so it wouldn't start. The original Dynabees didn't have an auto-start feature and they came with a pull cord that you could start it with. After getting the hang of it, it was much easier to just roll it down my leg between the hip and the knee to start it. Still, the auto-start feature of this Gyro Ball is a great enhancement to these balls.I took this Gyro Ball out of the box and started it on the first try. It's got a really smooth action and although I can't get it going as fast as I used to get the Dynabees going, it works really well. And not getting it going as fast could just be a function of my arms, wrists, and hands aren't as strong as they were 34 years ago. Still, I was able to get it going faster than 10,000 rpm. It sounds like a jet engine spinning up as you get it going faster and faster.Starting it is really easy when you get the hang of it. Move your hand in large circles, like you're putting on the lid from a large pickle jar. And do it quickly. Once the ball starts, the sound will change and it will start to hum. As it starts to hum, you can make smaller and smaller circles with your hand to keep it going or maintain the speed. Go back to bigger circles and move your hand faster to increase the speed. Keep in mind, slowing it down, its motion will want to rip the ball out of your hand, so hang on tight. With practice, you will find the "neutral" spot where you can hold it and it won't try to rip itself out of your hand as it slows down. From high speed, high RPMs, it can take 30 seconds to slow down and stop.The old Dynabees didn't come with a wrist strap. For beginners, that's probably a nice enhancement. But I don't want it and I don't use it. I work one hand/arm until it's burning so bad that I can't keep going and then I change hands and work the other hand. 34 years ago, I could keep it going non-stop for more than 3 hours that way. Now, my arms are really tired after less than 30 minutes. My goal is to get back to 3+ hours. But the wrist strap just gets in the way when I'm trying to switch hands. So I don't use it.I took off 1 star because I was looking forward to having the LED lights. But the instruction manual that came with it says: Note: not all units have LED lights. That was a disappointment. That's a bit like bait and switch. I bought this one because of the LED lights, and then it doesn't have them. Oh well. My old one didn't either. I'm not going to return this over that.