Featured Research

from universities, journals, and other organizations

Long jumpers do better with a spring in their step

Date:
July 2, 2014
Source:
Society for Experimental Biology
Summary:
Long jumpers and triple jumpers spend hours training to perfect their take-off. But what influences their performance? Scientists have discovered that taking off from a compliant surface -- such as a springboard -- compared with a firm, unyielding surface, reduces the energy cost of jumping over long distances.

Athletes test the effectiveness of different take-off surfaces.
Credit: Dr. Lewis Halsey

Long jumpers and triple jumpers spend hours training to perfect their take-off. But what influences their performance? Scientists have discovered that taking off from a compliant surface (such as a springboard) compared with a firm, unyielding surface, reduces the energy cost of jumping over long distances.

Related Articles


Dr Lewis Halsey and his colleagues conducted the study on trained athletes, capable of undertaking jumps repeatedly. The participants jumped a set distance (1.2 or 1.8 m), taking off from a range of different surfaces. Each wore a portable gas analyser to measure oxygen consumption, a good indication of energy expenditure. As predicted, the highest energy costs were caused by taking off from soft surfaces, such as thick crash mats. For the longer distance, however, jumping from a springboard was less energetically expensive than using a firm surface.

There are two possible explanations for this. Firstly, a compliant surface allows the angle of take-off to be closer to the optimum of 45 degrees, which gives maximum energy efficiency. Alternatively, firm surfaces cause the calf muscle to be used more, which produces energy less efficiently than the thigh muscle because it has to contract more quickly. Surprisingly, for the shorter distance, no difference was observed in the energy expenditure for firm and springy surfaces. Dr Halsey believes this may be due to the jumps being "too easy" for the athletes such that the take-off angle or muscle group used had little effect.

This research was presented at the Society for Experimental Biology Annual Meeting 2014 held at Manchester University, UK, from the 1st - 4th of July.


Story Source:

The above story is based on materials provided by Society for Experimental Biology. Note: Materials may be edited for content and length.


Cite This Page:

Society for Experimental Biology. "Long jumpers do better with a spring in their step." ScienceDaily. ScienceDaily, 2 July 2014. <www.sciencedaily.com/releases/2014/07/140702203812.htm>.
Society for Experimental Biology. (2014, July 2). Long jumpers do better with a spring in their step. ScienceDaily. Retrieved November 27, 2014 from www.sciencedaily.com/releases/2014/07/140702203812.htm
Society for Experimental Biology. "Long jumpers do better with a spring in their step." ScienceDaily. www.sciencedaily.com/releases/2014/07/140702203812.htm (accessed November 27, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Thursday, November 27, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Experimental Ebola Vaccine Shows Promise In Human Trial

Experimental Ebola Vaccine Shows Promise In Human Trial

Newsy (Nov. 27, 2014) — A recent test of a prototype Ebola vaccine generated an immune response to the disease in subjects. Video provided by Newsy
Powered by NewsLook.com
Pet Dogs to Be Used in Anti-Ageing Trial

Pet Dogs to Be Used in Anti-Ageing Trial

Reuters - Innovations Video Online (Nov. 26, 2014) — Researchers in the United States are preparing to discover whether a drug commonly used in human organ transplants can extend the lifespan and health quality of pet dogs. Video provided by Reuters
Powered by NewsLook.com
Today's Prostheses Are More Capable Than Ever

Today's Prostheses Are More Capable Than Ever

Newsy (Nov. 26, 2014) — Advances in prosthetics are making replacement body parts stronger and more lifelike than they’ve ever been. Video provided by Newsy
Powered by NewsLook.com
From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

Newsy (Nov. 25, 2014) — The US FDA is announcing new calorie rules on Tuesday that will require everywhere from theaters to vending machines to include calorie counts. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins