so in my life i try to avoid as far as possible what i might describe as teachery moments and what i mean by that is a teacher doing those kind of cliche classic things such as the bells for me not for you or whatever it happens to be right well i'm gonna do one right now because this is a proper bugbear for me can i please stress to you that the word axes is plural and that when we talk about each axis individual it is an axis okay so the axis is singular i cannot tell you how many times i've had to correct that for people so i just wanted to make sure before we get started on anything else that that's clear now that past and that the way and you haven't put up with me i want to define for you angular motion okay now you may have previously come across this concept you may not but this is my definition of angular motion it's going to support our learning in this case it's when a body and we're not necessarily talking about a human body here it's when a an object is what we mean by a body or part body so therefore a body or a part an object or a part of an object moves in a circle or part circle okay moves in a circle or part circle so when we are talking about angular motion it is about the rotational circular nature of movement and that is what we're going to get to today and i also want to stress to you before we get cracking that all all rotation in the human body all rotation occurs at joints okay so bear that in mind i'm really going to drill that point in one particular part of this video but that's my kind of intro without the way let's get cracking i would immediately like to show you these three images you might be thinking oh that's a lot of information in one go and who is this mannequin type figure well these are our axes oh let me be clear these are our primary axes of rotation there are many axes of rotation in the human body but these are our primary ones and i'll come back to that point in a second so let me introduce you to the first one this is what's called the longitude that's a u longitudinal axis here we go longitudinal axis you can see that this axis it moves down from the top of the body down to the bottom of the body now the intuition i want you to grab here is imagine this was a real person which by the way standing in the anatomical standing position feet flat down palms facing forward imagine if we were to rotate this solid rod in this direction can you imagine that that individual would twist and would turn almost like a 180 or 360 depending on how far you twisted it if you twisted it back in the other direction clockwise this time can you imagine this person would twist so the thing i'd like you to do is start to be considering sporting examples of movements that that would relate to could we argue for example that we could be talking about a discus thrower in the circle could we be talking about a pivot in netball could we be talking about a slalom skier that's an end there slam skier turning a gate for example can you see how this longitudinal axis is rotation or british and longitudinal axis are examples of these think about um yeah think about you know changing direction in hockey these are all examples uh a 180 or 360 in uh twist in trampolining for example these are all examples of rotation here now we're going to move on to this next one and can i stress here if you're not studying with ocr these will become wrong for you at this point this is an ocr specific tutorial ocr refer to this axis here as the transverse axis now you'll notice it goes through the body through the navel through the central master body from hip to hip can i also stress to you that there is an equivalent transverse axis here there's another one here another one here there's one here there's one these are all transverse axes okay now we'll look at the primary one which is the one that goes through the hip here now if this was to rotate in this case the clockwise direction what sort of motion would this performer go through well they go through like a somersault right can you sort of see that or they might do something like a front row i mean i meant that to be a forward roll by the way not a front roll you get you know what i mean this might be someone doing for example on trampoline they might do a seat drop now you might think hang on a minute what do you mean a seat drop james well imagine you twisted the bar in this direction now the legs will effectively come up into that position and that would be sitting you know effectively landing a seat drop these are examples of rotation around the transverse axis more of which in a second and finally we've got here the axis which ocr refer to and i am using that language specifically frontal now personally and i might do it in a second i actually call this the anterior posterior axis and by the way that will be absolutely fine if you prefer using that term you can use that in your exam this is it's more sort of technical name but let's refer to it the frontal here the frontal axis through the body and effectively imagine if we were to twist this bar in this direction it you know by the way i meant to say this is like a football player you might notice over here but if you notice here what would happen is that this person would effectively sort of spin in their head would come downwards this is a classic example of a cartwheel now you could say something like a star jump as well because of course we've got a frontal axis going through the shoulder through the shoulder through there but cetera but the other one i really like to give here there's lots of things like dance moves for example but i like a diving save in football i really like that one because you imagine this performer sort of like springing off into that direction rotating around this axis springing off in that direction that might be an example of a save in football now to finish off here whoops that wasn't what i meant to do finish off here that wasn't what i meant to do either um i wanted to put these examples in here for you folks let me put that didn't go to plan let me put this back you see how i use layers so i can i just stress then we've got here our longer tubing axis if i was to get my ruler out let's actually do that let me get my ruler out here if i was to put a solid iron bar through this performer let's see if we can sort of angle it correctly like this about there can you see now how rotation around the axis that longitudinal axis is this is the turning action in the disk a circle can you if i was to bring this one here and to put it through the hips now here can you see how for example what's happening here is rotation around the transverse axis and can use it's harder for me to demonstrate this one and i'll go with a lighter color this time something which is like a purple can you imagine for example that we've got the axis of rotation almost passing through the navel there and kind of coming out the navel the other side can you see how kind of rotation there is happening around that rotation is happening around there rotation is happening around there so these primary axes represent that notion now can i just bring you back to one of the points i made earlier i am talking about primary axes of rotation all of which pass through the center of mass can i reiterate for you that this performer has a transverse axis running through their knee their elbow their shoulder that this performer for example this performer here has a frontal axis which is specifically acting through their hip okay these are joint specific axes and i would encourage you to consider that because of course you can for example rotate part of the body without rotating all of the body and that still occurs around axes and they will become more specific joint specific axes in that case right i think that's what i wanted to share with you hope that's useful thanks