I would think it would depend on what you mean by "lower back issues," since that's a heck of a vague term.
If it's a disc problem, STS might not be a good idea. If it's general lower back pain, then strengthing the core could help, and following STS's progressive set-up (from endurance, through hypertropy, through strength) could actually be beneficial. According to Stuart McGill(sp?), a back pain specialist, it's important to develop lower back ENDURANCE to prevent back pain (which is a statement that kettlebell trainers glom onto, since kettlebell swings are excellent for developing lower back endurance).
If you have a back problem for which you are currently under a doctor's care, then s/he would be the best person to answer your question.