Walking: there's natural, and there's efficient

I'm finding out that many of the skills that come naturally are not optimal.  Walking is one.  Joanna Hall's technique is way more efficient than merely putting one foot in front of the other.  The follow-through with the ankle is a bit awkward when wearing work boots, as they (by design) support the top of it to prevent straining, and I admit to feeling a tad self-conscious swinging my arms like a child going choo-choo; but the technique works.  I hadn't realised how lax my 'natural' style had become.