Had my 1st month review with the trainer yesterday. Everything is going well but told him I wanted to strengthen my core because I suffer from a lot of lower back pain. He knows I work in an office sitting down most of the day, so he explained it is probably caused by the group of muscles connected front and back to the pelvis. Made me try and touch my toes, which I couldn't, then made me do some rather uncomfortable stretches, and after each repetition the amount of rotation around my pelvis increased a little. He said he thinks by Wednesday I'll not have that back pain and my hamstrings should be less tight which all helps.
Again, want sure this was something I'd stick with but really enjoying it at the moment.