What does cmj mean

However, some contact mat systems may calculate jump height for you. If not, then the test administrator can calculate jump height from flight time data using either of the calculations below.

Force Platform — Those using a force platform are advised to calculate jump height using the following formula 26 :. High-Speed Camera — When using a high-speed video camera and appropriate software, flight time is typically calculated via slow-motion analysis. From this, because the flight time has been obtained, jump height can then be calculated using the formulas above.

Accelerometer linear position transducer — Similarly with the contact mats, accelerometers typically self-calculate jump height, peak power, and peak velocity — meaning no additional work is needed. Infrared platform e. OptoJump — This system calculates jump height by measuring flight time and then performing the abovementioned jump height formulas Therefore, the test administrator is not required to perform any calculations.

Now you know what test apparatus you are using and how to calculate jump height, this next section is very straightforward. With a minimum of three jumps completed, and therefore three jump height scores, an average score is then calculated.

This is done by using the following equation:. Then conducting the test there are several factors that need to be taking into consideration before you begin — some being:. The CMJ has been shown to be a valid and reliable measure of lower-body explosive power 3. Some coaches believe that reading one article will make them an expert on Performance Testing. Performance Testing entails many, many topics. To make you an expert coach and make your life as easy as possible, we highly suggest you now check out this article on The Vertec Jump Test.

Reference List click here to open. Owen is the founder and director of Science for Sport. Send Me My Free Copy! By Owen Walker 10th Jul 5 min read. Summary The countermovement jump CMJ is a simple, practical, valid, and very reliable measure of lower-body power. Keywords : power, vertical jump, CMJ, arm-swing. Application As power is a critical component in so many sports 21 , and the CMJ is a simple, practical and reliable measure of power in the lower-limbs, then it would seem an obvious choice as a tool to measure and monitor performance.

Procedure How to conduct the test It is important to understand that whenever fitness testing is performed, it must be done so in a consistent environment e. Required Equipment Before the start of the test, it is important to ensure you have the following items: Reliable and consistent testing facility e.

One of the following: Contact mat, force platform, linear position transducer, high-speed video camera and software, or an infrared platform. Performance recording sheet. With the test apparatus ready e. When instructed by the test administrator, the athlete must jump as high as possible and attempt to land in the same location on the platform as they took-off from.

The athlete must perform a minimum of three jumps so that performance averages can be calculated. The method for measuring jump height using various equipment is as follows: Contact Mat — If a contact mat is being used, then fight time is typically the outcome measure. Scoring System Now you know what test apparatus you are using and how to calculate jump height, this next section is very straightforward. Considerations Then conducting the test there are several factors that need to be taking into consideration before you begin — some being: Individual effort — Sub-maximal efforts will result in inaccurate scores.

Varying take-off and landing positions. Arm-swing or no arm-swing. Countermovement drop depth. Flexing on the ankles, knees, or hips during flight. Validity and Reliability The CMJ has been shown to be a valid and reliable measure of lower-body explosive power 3. Contact mats 4, , Force platforms 4, 11, Infrared platforms 15, 17, 18 Accelerometers linear position transducers 13, 19 High-speed cameras with appropriate software 4, 12, 16, What now?

Reference List click here to open Klavora, P. Vertical-jump Tests: A Critical Review. Strength and Conditioning Journal, 22 5 , pp. Filter by: Select category from list What does CMJ mean? Couldn't find the full form or full meaning of CMJ? Discuss these CMJ abbreviations with the community: 0 Comments. Notify me of new comments via email. Cancel Report. Create a new account. Log In. Know what is CMJ? Got another good explanation for CMJ?

Don't keep it to yourself! Add it HERE! Still can't find the acronym definition you were looking for? Use our Power Search technology to look for more unique definitions from across the web! Search the web. Citation Use the citation options below to add these abbreviations to your bibliography. Powered by CITE. Antilock Braking System. Artificial Braking System. On the following image, you can see major definitions of CMJ.

If you want, you can also download image file to print, or you can share it with your friend via Facebook, Twitter, Pinterest, Google, etc. To see all meanings of CMJ, please scroll down. The full list of definitions is shown in the table below in alphabetical order. This page illustrates how CMJ is used in messaging and chat forums, in addition to social networking software like VK, Instagram, Whatsapp, and Snapchat.

From the table above, you can view all meanings of CMJ: some are educational terms, the other are medical terms, and even computer terms. If you know of another definition of CMJ, please contact us.

We will include it during next update of our database. Please be informed that some of our acronyms and their definitions are created by our visitors.