not curves), plus I have a neck injury. And the thing I love the most is that it charges your devices. The instructions do not make this clear that the rods you are looking for will have different heads on them. As an adult, and having spent the last 18 years working on my feet for 8 hours a day, things have changed. I was hanging up larger, heavier cruisers so wanted the extra support. Keeps me from having to put all my wine on the counter, now it looks organized and neat! Beautiful love it! I?m 64 years old and recently had both knees replaced. My biggest complaint is probably that theres no transparency mode which is typical to have with a noise cancelling headphone. When I started to run these weights started to bounce on my collar bones which was annoying during the first 1 miles but then it started to hurt - I ran 4 miles and my collar bone became red and the painful.