My home shared gym had the weights removed because some kiddy got injured from them. So I chanced upon this improvision: There is a long pull up bar hanging at the end of the cables. I unlatched it and used it as my weight. It weighs only, say, 2or3 kg? [5-6 pds]. However, due to its length, when I held it at one end and tried to do a bicep curl, it felt like my 1 rep max on the dumdbell. I shall list the advantages of training with it: 1] I did 20 reverse bicep curls. the next day my reverse forearm felt sore like never did when i used the dumbbells. In short, it seems more stablelizers r used[more of the free weight advantage] 2]If I am right about my physics, the weight i lifted was only the 2-3 kg, even though the effect of it being like a 20kg dumbell on my biceps were there. What it means that it is good for people with back problems or with suspect knees, like me 3]It can better to train me to handle pole like things which is more practical in the streets. Things like the leg of a chair, poles themselves, brooms, sticks etc. The unstable nature of it is distinct from a block of very heavy things, which are not as useful. I am planning to completely substitute dumbbells with the bar. I guess you all at the gyms can use the barbell bar..just hold it at various lengths to vary the 'weight'.[though may have to plaster up the sharp edges] Can someone list me even one con, other than that more space is needed?