So based on the advice around Planks as sufficient to improve core strength is the approach of this video fairly near the mark?
http://www.youtube.com/v/8yFtmkYcZEY?fs=1&hl=en_US
@Kelvin started
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So based on the advice around Planks as sufficient to improve core strength is the approach of this video fairly near the mark?
http://www.youtube.com/v/8yFtmkYcZEY?fs=1&hl=en_US