CHICAGO, March 28 -- Running at a prescribed, one-size-fits-all "optimal" cadence doesn't play as big a role in speed and efficiency as once thought, said a study posted on the website of the University of Michigan on Thursday.
To find out what determines cadence and how much cadence really matters, Geoff Burns, an elite marathoner and UM doctoral student in kinesiology, had the top 20 elite male and female runners record their cadence during the 100K International Association of Ultrarunners World Championship in 2016.
While the average number of steps per minute was 182, the number of steps per minute per mile varied enormously by individual.
"Some ran at 160 steps per minute and others ran at 210 steps per minute, and it wasn't related at all to how good they were or how fast they were," Burns said. "Height influenced it a little bit, but even people who were the same height had an enormous amount of variability."
The main takeaway for runners is that cadence is highly individual, and the body knows what's optimal. This means runners shouldn't necessarily try to manipulate cadence to reach the 180 steps, but rather, monitor cadence as their running progresses.
"It's a barometer and not a governor," Burns said. "There's no magical number that's dogmatically right for everybody."
For years, many coaches and practitioners thought that cadence should remain constant as speed increases, which required longer steps. Burns says longer steps takes more energy, and his study found that cadence naturally increased four to five steps per minute per mile as runners ran faster.
Other findings also surprised Burns. First, step cadence was preserved through the race, even during the torturous "ultra shuffle" near the end, when racers shuffle across the finish line, barely lifting their feet.
Another unexpected finding is that by the end of a race, cadence varied much less per minute, as if the fatigued runner's body had locked into an optimal steps-per-minute turnover. It's unclear why, but this deserves further study.
The research has been published in the February issue of Applied Physiology.
如何用英文回复“邀请”
2011年实用口语练习:与天气有关的口语(下)
张柏芝谢霆锋正式离婚(双语)
2011年实用口语练习:各种“乱七八糟”的表达
2011年实用口语练习:不得不分
实用口语:关于衣服的必备短语
2011年实用口语练习:5=击掌?
2011年实用口语练习:你担心什么呢?
2011年实用口语练习:Assignment 家庭作业
2011年实用口语练习:我是无辜的
2011年实用口语练习:你把事情搞砸了
如何用英文表达“我不太想做某事”
英文单词 “Do”的活用
如何用英文表达“满意”
2011年实用口语练习:各种哭的说法(一)
英文结婚短信祝福语
2011年实用口语练习:今天我做东
2011年实用口语练习:各种睡不着
2011年实用口语练习:同性恋的种种
2011年实用口语练习:说客 拾人牙慧
2011年实用口语练习:今日事今日毕
八句话表达感情纠葛
2011年实用口语练习:别想宰我,我识货
2011年实用口语练习:不只是裸露这么简单
如何用英语表达“原来啊…”
2011年实用口语练习:生活奢华的猪
对学英语最有帮助的英文绕口令
2011年实用口语练习:劝君“上当”一回
2011年实用口语练习:我办事你放心
2011年实用口语练习:歉意如何说出口 1
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |