Flexion Inspection: How Long Do You Sit Down Every Day?
I had a really interesting chat with Ironman athlete and Physiotherapist Claire Doherty (@Claired0) earlier today, regarding glute activation in runners. In particular the importance of being able to run with adequate hip extension to facilitate Glute.Max. activation.
What Limits Your Glute Activation?
In stark contract to the image here (right) of Mo Farah in full flow, showing fantastic hip extension – so many of the athletes we meet single every day barely achieve zero degrees hip extension.
It’s important to view running as an extension pattern, with the triple extension of hip, knee and ankle driving us forwards stride by stride, during stance phase of gait. Particularly Glute.Max. is vitally important in it’s role of creating a powerful drive of the leg, backwards against the ground – pushing us forward.
In terms of antagonistic relationships; overactivity and shortening in hip flexor muscles such as Rectus Femoris, Psoas, Iliacus, Tensor Fascia Lata, and even Sartorius can all act to inhibit a runner’s ability to extend the hip and utilise Glute.Max.
What can affect this overactivity and shortening in the hip flexor complex?
Numerous factors, of course – but one significant factor is time spent sitting, or variations thereof (cycling, driving, etc…).
The various seated postures we get ourselves into on a daily basis, are just about the direct opposite in terms of movement patterning to running!
Sitting is a static flexion pattern…
Running is a dynamic extension pattern…
I’m often quick to point out to runners and triathletes that if you spend time reinforcing this flexion pattern (which is essentially what you’re doing with 9hrs at a desk every day!), then your ability to extend the hip will probably suffer – and as such also your running glute activation, lumbro-pelvic muscle balance, and stride length.
Put simply – excessive time spent seated, while often unavoidable (I’m slouched on a chair as I type this), isn’t going to do your running, or indeed your butt, any good!
Image via Benjamin Thompson
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