It seems like a core training is a staple of every training program regardless of the goal. [caption id="attachment_2968" align="alignleft" width="266"] What many consider a core exercise. Want to address a low back issue? Do more core training. Want to improve your sports performance? do some core drills specific to your sport. Want to tighten up your mid-section? Do some abs-specific core drills. Now I'm not saying this is the best or only way to achieve your goal in these area but that this is what many will default to in order to achieve success. And there are a couple of ways we typically train the core in terms of the plane we are moving in. 99% of our training is in the sagittal (forward and back) plane and so we do: * crunches * reverse crunches * leg raises * roll outs ...you get the point. Many core exercises, and well exercises in general, are designed with a forward and back emphasis. But sometimes we'll add in a side to side core drill targeting the frontal plane. This could include: * side bridging * side crunches/bending/flexing * lateral pulls or lifts Now do you notice anything in common about training in the sagittal or frontal planes? The features in common is that gravity helps to reduce the force. For example, if you were on the ground on your back and tried to sit up gravity works against you and slows down this movement. As well, if you were on your side in a bridge position gravity works against you and makes it difficult to hold a tall position for an extended period of time. However when we move in the rotational plane (think twisting) gravity down not slow down the movement. If I hold a basketball at chest height and...