Bought three, one was damaged but exchanged it without a problem. Very happy with their performance. Just as good as the original Powerball but way more affordable!

I did not know what to expect as have never seen this kind of exerciser. I was very surprised how effective this trainer ball is - I use it every day now.Great quality, nice black case with zipper to carry it with me and nice light addition. Recommended!

I've had a few different kinds of these over the years. this is the first one I've had with a start assist... it was really convenient the first two times I tried it out... thats it. now the start assist is broken and a piece of something is rattling inside. I can still start it like the old versions and it seems to be working ok, but it still broke after the first 10 minutes of checking it out. never dropped it.. just cheap components

Once I learned how to wind it up it works great. I think it helps my wrist and forearm but I am not sure . I wish it would light up but I am satisfied with this product and the price was right.

I was about to give up It was hard to get it to work at first. I thought perhaps I wasn’t strong enough. Finally like kick starting a cold engine, it ‘ caught and the inner whirling jumped into action. Using it has not aggravated my tendinitis so I’m hoping regular use will increase my hand/wrist strength.

This is a good item. Initially is was difficult to get it started. Once I learned it was easy. It helps with strength throughout the lower arm. It also helps with range of motion.

Vale muito a pena

Işıklı ve göstergeli birşey aramıyorsanız bence bu yeterli işinizi görecektir.

مجرد ان وصلني المنتج لم يجلس عندي إلا ساعة ونصف و بعدها تعطل ، ما انصح بالشراء نهائيا

I had a on the job hand injury and this thing definitely helped gain strength back in my hand as well as forearms. Kinda tricky to get started but once you do, it is easy. A minute or two a couple times a day worked great.

Ótimo pra treinar a força do pulso e antebraço!

No expert on those, but this one is much better quality and cost less than my old one so to me buying this was a happy purchase.

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.