Obviously don't go full tilt the first few weeks, but after you start tightening up your belly, extend further and further and it will target your entire core. Terrific product and I feel the tension on the way back is a great safety feature whereas the other devices out there if you lose control you can find yourself hyper extending and hurting yourself. This Ab Carver is a very controlled, effective device to strengthen your abs and low back!. This thing is righteous! I've been having low back problems from playing too much golf and I feel the Ab Carver has not only strengthened my abdominals but also strengthened my low back.
So, start slow, get a feel for what you can handle and go from there! Good luck!. Great Product! I used it regularly for about two or three months and my abs never felt better. In addition, I used to have a little bit of a tummy, or at least some excess weight in my lower belly area. After using this for only a few weeks, it was gone. Like gone and replaced with a nice tight tummy. Don't take this review as, oh this is easy, no it is hard. Go slow. I mistakenly tried to do fifty reps in one day after not having it too long and I couldn't laugh without being in pain for two days. I couldn't do this again for a few days after that.
Fits MacBook Air fine, plenty of pockets, great zippers and easily adjustable belts and great clips. Finally a backpack that exceeds my expectations, roomy but not too large.
I am so love it. this is awesome backpack, I can't believed that the price is so cheaper. a lot function and come with rain cover.
Great value, perfect for running, excellent fit (I wear a 34 C and bought this in medium and it fit perfectly).