Mike: Okay, the first core exercise you can try is going to be ... Mike: And if you'd like to check out more videos on lumbar ...

If you’re trying to build core strength ... and even in the lower back. To target all these muscles, you’ll need to expand ...

Developing core ... back muscles, as well as the hip muscles, quadriceps and hamstrings, which support our spine and pelvis. Cole Barash for The New York Times Popular core-strengthening exercises ...