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<p>One of the things McGill has done in his research with sensors on actual athletes is measure the muscle contraction plotted against spine loading. Forget that they load the spine repetitively, crunches aren’t even a particularly effective exercise because they isolate two small, relatively insignificant muscles in the abdomen. The real key to core strength and performance is developing the entire muscular structure around the abdomen. There are layers of muscles and McGill describes them as working like the layers of plywood to provide stiffness. So, isolating one or another isn’t really the goal.</p>
<p>Also, the purpose of these muscles is not to bend or rotate the spine. Just the opposite. These muscles stiffen and resist bending or flexing, protecting the spine under load and increasing athletic performance by allowing the maximum transmission of power generated by the hips and legs to the upper body. For example, if Tiger Woods did not have a super stiff core at the moment of impact, the power generated by his legs would not be transmitted to the golf ball.</p>
<p>There are entire books and programs on core training. I’ve been doing 10 to 20 minutes of core exercises, three days a week for two years, and I haven’t even done them all. However, if she wants to feel some burn in the abs, here are a few of my favorites. All of these are very advanced, so don’t even try them until you can do a comfortable 60 seconds of front plank and side plank without back pain.</p>
<p>[Stir</a> the Pot](<a href=“http://www.youtube.com/watch?v=kukmaW9CmSU&feature=player_detailpage#t=65s]Stir”>http://www.youtube.com/watch?v=kukmaW9CmSU&feature=player_detailpage#t=65s)</p>
<p>This one, from McGills video, is really tough. Especially if you roll the arms forward towards your head, creating a longer lever arm, and try holding that position. This will set your “abs” on fire. The failure point with this exercise is having the core strength to keep your back from dropping into an arch. So, any discomfort in the lower back with this (or any plank) is the end of the set).</p>
<p>[Stability</a> Ball Dead Bug](<a href=“http://www.youtube.com/watch?v=yIOscniTeCU]Stability”>http://www.youtube.com/watch?v=yIOscniTeCU)</p>
<p>This one is really, really hard and can be made harder by holding the position with the opposite arm and leg extended for a few seconds and/or by squeezing the ball harder between the knee and hand. This works the abs like crazy, but adds a serious anti-rotation element, all without flexing the back. Again, failure point will be inability to hold the lower spine. A folded towel under the lumbar to press against may help.</p>
<p>[Stability</a> Ball mountain climbers](<a href=“http://www.youtube.com/watch?v=t8D3CMqTuik]Stability”>http://www.youtube.com/watch?v=t8D3CMqTuik)</p>
<p>This can also be done with the hands on a bench, but the stability ball version is brutal, especially if you try to hold each knee drive for a second or two. The trick is that you have to squeeze the ball to keep it steady at the same time as maintaining a stiff core. I don’t do it with the ball against a wall as shown in this video, which would probably make it a little easier. I did this one in my workout on Wednesday and it’s still crazy hard for me, although I can finally do ten reps per leg without collapsing in a heap on the floor at the end. Again, core stiffness plus anti-rotation. Same caution: stop if you feel discomfort from the lower back arching (the idea is to slowly build core strength sufficient to keep the back from arching).</p>
<p>[Pallof</a> Press](<a href=“http://www.youtube.com/watch?v=YpvbR_Ah8_g&NR=1]Pallof”>http://www.youtube.com/watch?v=YpvbR_Ah8_g&NR=1)</p>
<p>This is one named after John Pallof, the physical therapist who practices at Mike Boyle’s Stength and Conditioning in Boston. This is one of many exercises designed to increase the strength of the core in preventing rotation. It can be done with a cable column (as shown) or rubber resistance bands. The key is that the force is coming from the side and trying to turn the body. The challenge is to use the core to prevent being turned. It can also be done simply holding the arms extended. Standing, kneeling on both knees, kneeling on one knee – all great variations. Start with a lot less resistance than you think you can handle. 30 to 60 seconds per side is tough. This will make the love handles burn.</p>
<p>[Beginner</a> core exercises](<a href=“http://www.youtube.com/watch?v=kCwsuPVZeZo]Beginner”>http://www.youtube.com/watch?v=kCwsuPVZeZo)</p>
<p>Again, all of these above are advanced to very advanced. If you’ve never done core training, they may be impossibly difficult. This little beginner video is where where I started.</p>