I have been surprised (and a little amused) by how difficult the first exercise in the Born to Run training guide is. It’s really just a combination of two exercises that I do all the time already, so I figured it would be pretty easy. But no.
Basically, it’s just single-leg standing with the heel raised. There are three versions with minor differences in what you do with the non-standing leg, to challenge your standing leg in different ways.
I have done single-leg standing for years as part of my tai chi practice. I also do calf-raises nearly every day, including some single-leg calf-raises. And yet. Put them together and things get dramatically harder.
With the single-leg standing exercises I do as part of my tai chi practice, I have my heel down—which makes standing on that foot much, much easier.
With the single-leg calf-raises, I’m only balancing on the standing leg for a few seconds, which turns out to also make a difference.
Standing on one foot with the heel off the ground, and then staying that way for tens of seconds, turns out to be much harder than I’d expected. But it’s harder in ways that I can already tell will mean practicing those exercises will quickly produce improvement not just in those exercises, but also in my running, and in my general foot strength and foot health.
In particular, I keep trying to jab the tip of my left index toe into the ground, when I should be using the pad of the toe. (Probably a left-over from decades of sometimes wearing too-small shoes. My index toes are longer than my big toes, which is not something that shoe salesmen in the 1960s thought about. Also my left foot seems to be a fraction of an inch longer than my right foot, so shoes that fit my right foot perfectly slightly constrained my left index toe.)
