Já uso faz tempo,essa marca é a de melhor qualidade.

Toller Spinner für kleines Geld. Passt genau zu meinen Händen. Wird etwas lauter mit der Zeit, aber bei täglichem Training lässt sich Abnutzung nicht vermeiden. Wurde allerdings nach 3 Wochen schon lauter, deswegen nur 4 Sterne. Kommt aus Taiwan, deswegen sympathisch!

excelente producto

Great product. Simple and efficient.

騒音が少なく、スムーズに回ります。購入前にYouTubeで回し方のコツなどを見たので、２回目で回せるようになりました♪複数の商品の動画を見ましたが、この商品はかなり騒音が抑えられているようで静かです。ひもが無くても、手のひらで回してからできるようになりました。腕の筋持久力を付けるのに良いかと思います。消防団に入っているのですが、渦巻き状態のホース２本を同時に運ぶときに、１本は肩に担げるのですが、もう１本は手で鷲掴み状態にして運ぶ必要があります。この状態で走る際に、腕の筋持久力が重要となります。当初、５０メートル程度しか持ち運べなかったのですが、この商品でトレーニングしたおかげで200メートルほど運べるようになりました。

I was able to pick up this NSD Powerball for $17 here on Amazon and what a steal!It probably took me about twenty minutes to get the motion down and, to be honest, I thought I got a broken one for the first ten because I couldn't get it to do anything. The best advice I can give is not to fight the motion you feel in the gyro. It's not about just spinning your hand around as fast or as hard as you can, it's about matching and then revving up the cadence of the gyro. It's fascinating to watch it switch directions when changing hands or rotation and equally amazing watching it jump about when you've ceased moving and the gyro just spins and spins and spins.As far as the exercise goes, I can certainly feel the burn and wish that I was able to keep it going for longer without becoming sore. I got this to help strengthen my hands, wrists, and forearms, which get abused daily as a computer tech and also an avid landscaper. I can certainly see this helping, but I have to be careful not to overdo it, as it honestly is quite addicting and fun (not really a valid complaint :)My only con is cheap construction. While I don't think it's going to stop working anytime soon, mine makes a lot of squealing noises at low speeds. Once revved up, it's no longer audible and you can only hear the whir of the gyro. At the price point, it's not really something worth complaining about. Whenever this one wears out, I'm quite sure I'll go for a nicer model. Very satisfied.::EDIT::04/17/13About a month with the NSD Gyro and I am feeling amazing. The first three weeks were spent exercising one day and being sore for two, and again, and again. I'm happy to say that after a week or so, I began to have this warm tingling feeling spreading from fingertip to elbow while I lay in bed at night. My god, that's blood circulation! Within the last week I've been able to make it an every or every other day affair. I like to put in earbuds and either play air drums, or dance around a bit with the gyro. It really is fascinatingly fun to go with a good beat. I like to get rhythms going where I can swing the gyro around half speed on the down beat to mix things up. My highest praise goes to the fact that the exercises can be as easy or as hard as you'd like without any need to change weights. I tend to start out with a wide, slow arc holding it as a baseball, switching rotation clockwise and counterclockwise before switching hands, just to warm up. Then I speed up a tad, holding the gyro like you would the end of a jump rope: clockwise, counterclockwise, switch hands. Then I grip the gyro like I'm holding a glass of water and I tip it forward and back, forward and back (this is an amazing workout...if you can manage to switch rotation of the gyro on this one, kudos...it's hard). Then I hold it by nothing but my fingertips and again pretend that I'm holding one end of a jump roap: clockwise, counterclockwise, switch hands. This is when I go back to the original slow arcs, holding it as a baseball. Once I've loosened up a bit, I do it all over again, but usually at double speed, or close to it. Realistically, you can make this spin in almost any way you can imagine, as long as you go with the flow :)It still squeaks when slowing down, but shows no signs of wear. Very impressed.