Understanding Muscular Contractions in PE

Welcome to another GCSE PE related video with Mr Matthews. Today we will be discussing types of muscular contractions. Before we begin do not forget to subscribe to this channel and hit the notification bell as content will be coming to you thick and fast in the next few weeks. First things first, for muscles to produce movement they must either shorten or lengthen. This is known as an isotonic contraction. There are two types of isotonic contractions. These are concentric and eccentric. A concentric contraction takes place when a muscle shortens and contracts under tension. So this can be seen during the upwards phase of a bicep curl. An eccentric contraction is when the muscle lengthens under tension and this can be seen during the downwards phase of a bicep curl. This can also be applied during a push-up. So during the upwards phase a concentric contraction can be seen as the triceps shorten under tension and during the downwards phase an eccentric contraction can be seen as the triceps lengthen under tension. So in summary during isotonic contractions movement can be seen whether this be a muscle shortening and contracting concentrically or whether it be a muscle lengthening and contracting eccentrically. Moving on to isometric contractions. Here muscles do not change length whilst under tension and as a result no movement takes place. So this can be seen during the performance of a handstand as the performer uses their arms to support their body weight and there is no movement because the position is held still. And it can also be seen during a plank position where the performer holds his stationary stance. And there you have it guys, a short and concise video summarizing muscular contractions, looking at isotonic and the two different types of isotonic contractions, concentric and eccentric, as well as isometric contractions. I hope you found today's video helpful. If you did, please do not forget to like the video and comment in the section below with any questions you may have. Thanks for joining me. As always, take care and see you soon.

There are two types of isotonic contractions. These are concentric and eccentric. A concentric contraction takes place when a muscle shortens and contracts under tension.

So this can be seen during the upwards phase of a bicep curl. An eccentric contraction is when the muscle lengthens under tension and this can be seen during the downwards phase of a bicep curl. This can also be applied during a push-up.

So during the upwards phase a concentric contraction can be seen as the triceps shorten under tension and during the downwards phase an eccentric contraction can be seen as the triceps lengthen under tension. So in summary during isotonic contractions movement can be seen whether this be a muscle shortening and contracting concentrically or whether it be a muscle lengthening and contracting eccentrically. Moving on to isometric contractions.

Here muscles do not change length whilst under tension and as a result no movement takes place. So this can be seen during the performance of a handstand as the performer uses their arms to support their body weight and there is no movement because the position is held still. And it can also be seen during a plank position where the performer holds his stationary stance. And there you have it guys, a short and concise video summarizing muscular contractions, looking at isotonic and the two different types of isotonic contractions, concentric and eccentric, as well as isometric contractions.

I hope you found today's video helpful. If you did, please do not forget to like the video and comment in the section below with any questions you may have. Thanks for joining me. As always, take care and see you soon.

Transcript for:Understanding Muscular Contractions in PE

Transcript for:
Understanding Muscular Contractions in PE