This is a really excellent piece of kit. The cable quality is good, and the anchoring system is reliable (so far). The handles are easily strong enough to cope with the draw strength and provide for a reassuringly secure grip, despite their sveldt dimensions. The Elastikon range numbers from I to IV, and I consider each expander as an integral component of a more comprehensive system of exercise equipment. In following a proper system of progressive resistance training, I need to be able to:1. Load a pair of handles to a level resistance that I can successfully pull for the lower value of my target repetition range.2. Build toward the upper value of my target repetition range over a few sessions, separated by adequate rest periods; I aim to exercise on alternate days, or every third day (if not adequately rested).3. I add 5 fkg resistance and repeat the cycle.Each yellow cable is 10 kg of resistance, while red=15 kg, blue=20 kg and green=25 kg.In order to add just 5 kg of extra resistance per exercise during each cycle, I need access to the full range of expanders.All things considered, I am pleased with the results obtained from my investment of time and effort, hence a five star review!

extenseur de musculation de très bonne qualité. je l'utilise en complément de la pratique conventionnelle. les extenseurs permettent un travail différent de la musculation. Plus les élastiques sont tendus plus la force nécessaire est importante. le maximal de la force est donc en fin de mouvement alors qu'en pratique traditionnelle la force max intervient en début de mouvement. La sensation est donc différente. Je fixe l'extenseur a un crochet au mur permettant une multitude de mouvements. Vraiment je suis ravi du produit qui se situe très au dessus des produits de la catégorie. j' associe également les élastique de différentes forces permettant des valeurs intermédiaires (10+15 = 25kg ....) je regrette seulement qu'il n'y ait pas d'extenseur de 2.5 kg, ca manque!!!

Le système de fixation des élastiques est super, solide et sécurisant. Quand tous les élastiques sont en place, il faut déjà avoir de bons bras pour s'en servir heureusement la fixation permet d'en retirer autant que l'on souhaite très facilement pour faciliter la progression.Le seul bémol est que ces élastiques sont très longs et pour les exercices uniquement des bras une personne de taille moyenne aura du mal à pouvoir les tendre. Dommange

1) As the title says, I was surprised to find it about a level lighter than I expected (my expectations were based on reviews and a resistance chart that I found on expanderkrank.de, google "elastikon expander resistance diagram" on google image search to see it). I was actually able to do a few front chest pulls with it with all 5 bands - and I am not really a strong athlete or anything, although I have been training with expanders for the last few months. Based on my dumbbell measurements, it's pretty accurate at low elongations but only provides about 33kg of resistance at 145-147cm (between outsides of the handles) instead of 45-50 that the chart suggests. Had I known that, I would have got one a level higher. This one is barely enough to serve its purpose for me - and I will certainly grow out of it pretty soon unless I do a length modification described below. Might actually purchase a level 4 version in the foreseeable future even though it would be another 13 pounds spent on shipping.2) It's really as long as people suggests. About 96.5 cm from the outside of 1 handle to the outside of the other or about 71cm total cable length. There is some evidence that other models are about 2cm shorter but that hardly makes much of a difference. I have tried 2 length modifications to compensate for my short height and armspan (I am 168cm tall, can stretch it to about 140-145cm between the outsides): one is looping the cables around the insides of the handles. The problem with it is that it introduces friction that damages the outside layer of the cables over time. The other one is tying knots on the cables. It is actually not bad at all (each knot reduces the length by about 4cm, making it nicely adjustable for people of any height) but it's permanent in the long run: the bungees will likely lose elasticity in the places of the knots if they stay tied (and, thus, constantly under tension). Haven't decided yet if I am going to go for it. Might just get the level 4 version since the range of motion is not that important (within reasonable limits, of course - this won't be suitable for children) as long as the tension is high.3) The handles are not quite as bad as they are described in the other reviews. They are flat on the inside - meaning, unlike certain chinese models that Russia is flooded with (now those have some really poorly designed handles - like ones with grooves for fingers inside which makes any pressing or rotational exercises literally impossible without padding), they are actually designed with the typical exercises in mind! They are fairly thin but not really uncomfortable to grab. The only improvement could be rotating handles but that's not necessary.To summarize: could use more accurate resistance info (given that they are sold online) and some length options but otherwise probably the best bungee-based expanders on the market.

Me parece un accesorio muy útil para tener en casa o en el gimnasio, recomendable 100%.Me gusta la dureza variable