Peroneal Muscle and Tendon Injury and Overuse Explained

Peroneal Muscle and Tendon Injury and Overuse Explained


Hi guys, I’m Peter. I’m one of the sports
podiatrists from Shoes Feet Gear. Today we’re talking about peroneal muscles and tendons. These are the muscles on the outside of the leg here that stop your
foot rolling out. They can get overworked and cramp up, or injured, or tendon
strains. So, we’ll start off with the anatomy. First thing we’ve got is the
peroneal brevis muscle that runs down through here, joins on to a little tendon
through here, that wraps around the outside of the ankle and then joins on
to this lump of bone on the outside of your foot here. This little muscle is
one of the ones that works to stop your foot rolling out. The second one is the
peroneal longus which joins up right up here on the outside at the top of the
fibula bone. It comes down over the top and it joins on to a second tendon that
runs through the same spot. But, it actually wraps around underneath your
foot. On the outside of your foot you’ve got this little square cuboid bone, it’s
a little cube, it’s got a little groove there for that tendon to wrap down
around and underneath your foot. This cuboid bone sits through this area
here and that tendon uses that cuboid bone as a little pulley. So, when these
muscles and tendons work really hard, we can get overuse and cramping through
these muscles on the outside when you’re running. We can get strains through the
tendons, especially if we’re doing some uneven ground work, or we’re pushing
pretty hard, or we roll our ankle. We can strain and tear these tendons. Or, this
cuboid bone can get lots of pulling on it and aggravation and we get a dull
cuboid syndrome type pain through there. The main reason these guys overwork
with running and things like that is if foot is toeing off laterally and spilling
outwards, if our body weights heading outwards, these muscles have to work
really hard to bring you back and drive off nice and straight. These muscles are only really designed for changing directions. If you stand on uneven ground, change
direction, as a bit of a one-off movement to pull you back. If every step you take,
with tipping off, then these guys really overwork. People with high arches,
really high arch foot types, they’ll tend to roll off and roll out. The other
people are if this big toe is not working well, they might roll in
through the back of their foot with running, but as they go on to that big
toe, if this isn’t working correctly, that works like a stiff lever and causes feet
to roll out as well. So, if we need to get you tracking straighter, shoes with
support along the outside make a really big difference. We’re really looking
at the shape through here and making sure it’s got great contact along there to
stop you spilling out. That will really reduce the amount of work these guys
have to do and support that little cuboid bone. After that, we’ll use an
orthotic where we actually are tipping the front of your foot inwards. So, we
support the outside of your foot and change the angle onto the front of your
foot, so that as you push off, it tips your foot inwards. That has a
really amazing effect to reduce the workload through these guys. So, if you
have any pain or cramping or strains through the outside of your leg through
their, pop into Shoes Feet Gear in at Paddington.

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