hello welcome to another exam practice question video today we're going to be looking at this one
here number eight figure one and it goes down to the uh the bottom part that section there
with the the hip and ankle section this is a very common question is uh surrounding movement
analysis now for a movement analysis question you need to know a whole range of different things
some questions they might range from like this one here it's a very simple two mark question
but it could expand all the way up to six or maybe eight marks if they're asking for all
the different forms of analysis that you could make on a movement in sport so things that you
do need to know in a lot of detail are the bones the different joint types the different muscles
the different agonists and antagonistic pairs that work together contraction types planes and axes
and how they can all work together to bring about some form of movement so with this question here
we are just looking at the hip and the ankle and they are only asking us for the joint movement so
things like flexion or extension or abduction or reduction so what is moving or how i should say
are these joints moving in this example so if we just take the hip to start with so obviously it's
the uh it's the join between uh the top of the femur and the hip or the the the top half of the
performance body and what we're looking for here in the driving phase what we would be able to see
is this angle increasing at the hip interior so this usain bolt his torso makes one side of the
joint and then the femur makes the other side and during this drive phase that angle is going
to increase meaning it is extending so flexion is obviously where the angle decreases at the
joint extension is when the angle increases at a joint so the hip we have extension occurring now
in a different question it might focus on this and it might ask you what's the agonist what's
the prime move what's the antagonist what plane or axes is is that movement action taking place
in now in that scenario it would be the gluteus maximus that is contracting concentrically to
bring that femur so down and round behind usain bolt causing that extension while the
hip flexors have to be contracting eccentrically as they lengthen to allow that movement to occur
now if we take the ankle as the next point what joint movement is occurring in the drive phase
well if we were to click play and this was a video we expect to see the toes remain planted on that
starting block and the heel drives off from that block as usain bolt pushes away from it so we've
got that action of the toe moving down while the tibia and fibula move up and away from that
starting block so the movement is the toe being pushed down or the toes are being planted into
the starting block planted think plantar flexion so plantar flexion is occurring at the ankle
if they did ask you for the prime mover then we'd be dealing with the gastrocnemius and potentially
the solutes as well which is two muscles involved with plantar flexion what are the antagonists what
are what what muscles are allowing that movement to occur because what we have here an extension
phase at the ankle we've got the increasing angle at the joint so one muscle is going to have to be
lengthening to allow that increasing of the angle to occur and that would be the tibialis anterior
in this scenario but again you need to be going into these sorts of exam questions on movement
analysis with the bones that are moving or articulating the muscles which are the prime
move of the agonist as well as the antagonist the different contraction types that might be
occurring so you've got concentric eccentric or isometric and then perhaps the planes and the axes
and how they work together as well but that's that very common question movement analysis
this is a fairly simple one on the hip and the ankle where we've got hip extension and we've
got ankle plantar flexion so i hope that helped i'll see you again in the next one bye for now
bye