Hello, how are you? Welcome. I'll introduce you to Professor Matias Rodriguez. Look, did you see that I have a very good video. We're going to talk about levers and other things. In a series, we're going to talk about levers. Hug me for now. And we're going to see this applied to our body. Look, this topic has really revolutionized my way of seeing everything that is physical exercise because we could have, like, with the same weight, for example, in different positions, it takes another type of force and the force that I rest with the same object, for example, a weight, a dumbbell in this position or away from my body, is going to be different, therefore, it's going to change everything. How can I exercise, for example, that Louis had or using my own body weight and the degree of difficulty without modifying the difficulty according to the position of my limbs? It's really very, very good. For these topics, today in particular, we're going to start by looking at the subject of levers and levers, which is a very important subject in biomechanics, and we're going to go over basic issues. I ask you to join me for a presentation. Well, here we have our presentation on Ancash. biomechanics as a vein and our body is going to be made up of levers and here we are going to have the first image that is going to tell us a little about this it says that the biomechanical structures of the human being are built from a system of levers through which the body manages to produce a movement a lever look there is a rigid segment that has a support point around which to perform the rotation when an external force is applied to an internal one we can say that the lever has three parts and the rigid segment with our body the bones have to be born then we have a weight yes a weight the weight and the force that is created is going to be different generally our muscles are going to do what they exert the force and the support point in our body when making the joints then we have the rigid segment for example rigid segment the support point and the ocular action yes that is the force well that is a lever now we are going to continue here aria mother that a lever consists of three parts the fulcrum or support point the resistance or load to overcome or balance and the power force that must be generated to overcome or balance the resistance is moving this image that is exactly a support point and a resistance and exactly power force that it generates to overcome or balance that resistance well let's see here if I want to go over this quickly because this is what is generally known about levers and it is in many videos a lot of material that you can see I would like us to apply it directly to our body but I want you to know a little bit that there are three types of levers and in general terms the levers of the first kind the support point is already between the force and the resistance let's see if we have the example the example if force resistance this support point we will see one by one if the second generated the resistance is found between the support point and the force example the calves when walking and third kind the force is found the point between the support point and receives it if we will see here if the important thing is that in the first series of first kind what is in the middle is the support point you want 1 kind in the resistance what is in the middle and the one behind the kind is the force what is in the middle let's see some examples if here we will see these children well children adults we do not know that They are there swinging on that seesaw well this is a clear example of what the first kind levers are if this system is formed by the muscles for example here we are going to see the head and the nape of the neck that exert the force the weight of the head that tends to fall forward and the atlas first cervical vertebra is the support point well then we have our head there and we see that this muscle that we see here behind is the one that exerts the force if there is a resistance in front that is what prevents us from being all the time and doing this movement then the posterior muscle helps us to do the cervical extension well there we have for example if the muscle does exert great force we see there how the force is greater then there it makes that Alan system here and this is a very clear lever of the first kind in our body now let's see a lever for example of the second kind if there is the example of the wheelbarrow well the example of the wheelbarrow is taken a lot to talk about a lever of the second kind because because we had said that precisely the support point is forward in this case but what is in the middle is the weight to overcome then look at the resistance we have the example here yes of what would be the ankle if the twin muscle where we have the fulcrum support point if well on the left we see it here then we have the resistance in the middle and the muscular force that exerts it here in this case of twins and that tends to pull upwards this keeps our body in balance well now we are going to give the third kind it is one of the most named the one that we can see the most and we see this man there is this fisherman taking out that super big fish and what does this have to do with a fishing rod a clear example of a lever and of the third kind where the room in Qatar is the kind we see that the resistance is at one extreme the power is in the middle what is the power the force that it exerts if it is in the middle and the future support point is at one of the extremes and at the opposite end then in the middle we place what would be the force and it is the most common case that we are going to see our body for example the joints since we have what would be the elbow if we analyze this joint well in a video but we have if the entire sarmiento governed let's remember existence that would be in this case the hand so by the law of gravity this would go down so there has to be a point that exerts force to keep my hand in this position if my arm in this position what would this be the biceps continue biceps brachii and you will see that the previous one exerts force so that it does not go down the arm and caused an extension therefore there is a clear a clear example would be the levers well with this a brief description of what levers are now we can start to talk a little bit about the arm of the moment and what is the arm of the moment good to talk about this topic that is very important join me to watch it in the next video that is going to be really good and we are going to be able to understand now as well as moving away in my body yes or moving away from the axis a force begins to gain greater relevance if the load that I have to lift is greater then we are going to see this well this of the arm at the moment in the next video so I invite you to watch it and we are seeing each other if you liked this video subscribe to ideal a like and share it big one that can serve you and is not moving program bye