We independently select these products—if you buy from one of our links, we may earn a commission. All prices were accurate at the time of publishing. After a decade of working at a desk, I’ve noticed that my muscles have gotten much stiffer and sometimes I feel achy at the end of the day (even when I haven’t worked out). This has been a point of annoyance for me, especially as my posture has gotten worse over time, and I decided to take action last year by starting to go to a place that helps with flexibility. But the cost…