Have recently started going to the gym again and have encountered the same problem as always - I get lower back pains as a result.
I used to go to Pilates classes so know all about pelvic floor, core etc and incorporate some pilates in my warm up/cool down. But still end up with a bad back.
At the gym I use the treadmill for about 15 - 20 minutes and sandwiched in between using resistance machines (arms and legs). I suspect it's the leg resistance machines that are the problem even though I do engage my core and pelvic floor when using these machines.
Has anyone else experienced this and any ideas that could help? I don't want to stop going to the gym!!