It is more likely that all of the spinal stabilizers are weak, not just the one. I would recommend learning to engage the entire stability system more effectively. And there are most likely a number of sections of these various muscles that are not even getting stimulus to contract. The stability muscles of the spine work in a very digital manner, some are on while others are off and they take turns switching on and off to keep the spine in whatever posture it is capable of maintaining. You can’t expect training just the MF group to be the answer to this problem.
I teach a CEC series called “Stability Resistance Training” that address this type of programming. If anyone is interested, check out my website, www.hawaiifitnessacademy.com . Join the Movement.
Also I rarely see the use of ice being recommend for back pain. That is too bad. Ice is very helpful in reducing back pain and can be used by almost everyone. Clearance should be obtained as a precaution.
I teach CEC courses on “Recovery Essentials” that cover the topics of injury and effective management of discomfort. I usually teach at my studio on the Big Island of Hawaii, but I do occasionally agree to fly to other locations for workshops/seminars. Check out my website at www.hawaiifitnessacademy.com to contact me for more information. I will answer reasonable questions and inquiries.