> I've mastered Pilates, increased flexibility and strengthened muscles. At one point, my abs were so strong my husband nicknamed them "the plate." still not d

> I've mastered Pilates, increased flexibility and strengthened muscles. At one point, my abs were so strong my husband nicknamed them "the plate." still not doing the right thing you need to strengthen the lumbar muscles, eg with a specific weight machine (see Kieser Training, MedX) or other programme that can do that