Comments on: Core Strengthening Exercises: sophisticated ab crunches in the video series about the best strengthening exercises for your abs and core muscles by John Sifferman http://physicalliving.com/core-strengthening-exercises-sophisticated-ab-crunches-in-the-video-series-about-the-best-strengthening-exercises-for-your-abs-and-core-muscles-by-john-sifferman/ Change Your Body, Change Your Life Sat, 19 May 2012 01:43:30 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Vladimir Kelman http://physicalliving.com/core-strengthening-exercises-sophisticated-ab-crunches-in-the-video-series-about-the-best-strengthening-exercises-for-your-abs-and-core-muscles-by-john-sifferman/comment-page-1/#comment-77069 Vladimir Kelman Mon, 14 May 2012 02:33:17 +0000 http://physicalliving.com/?p=443#comment-77069 Isn't the first part of this exercise the same as spinal rock exercise by Shane Heins? http://youtu.be/76hYfYrPNNI Overall, it looks excellent. I'm already doing the second part in my joint mobility workout - got it from Mike Mahler. Isn’t the first part of this exercise the same as spinal rock exercise by Shane Heins? http://youtu.be/76hYfYrPNNI

Overall, it looks excellent. I’m already doing the second part in my joint mobility workout – got it from Mike Mahler.

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