Really great these things. I had first made at the gym so that acquaintance. The green tubes were fastened there in different heights to wall bars. So I ordered 2 red and with me aufm attic via carabiner above and attached below. Have to say really great by the auspowern after weight training, warm-up or just for between. You have to prepare anything great and can start right away. Thereby, the resistance to the drawn length increases can vary the intensity corresponding to twice or even one grab. Moreover, I also find it very joint-gentle. Very handy for holidays etc ...
