I'm still very much a greenhorn, but due to my work schedule, my weekday runs have to come after work in the evenings. And I'm beginning to notice some tightness in my middle back, almost like spasms. BUT, everything I'm seeing online and youtube, deals with stretching and warming up after sitting all day at a desk. I do the complete opposite. I average walking 5-7 miles a day at work and I'm upright all day. And to go and run 2-3 miles afterwards, is taxing sometimes. I'm doing dynamics before and static stretching afterwards, but nothing is really helping my back. It's not a bad pain at all, but just annoying. Any of you veteran runners have any tips and tricks trying to safley log miles after walking a bunch of miles at work? Once again, I'm not sitting all day, I'm walking and standing all day, but I love running and I want to do what I can to be injury free. . Thanks in advance y'all!