Carl的共享空间

 

 

 

 

 

It turns out that there are rules governed by physics to explain why
the best distance runners look so different from the best swimmers or
rowers and why being big is beneficial for some sports and not others.

 

"I've told people: 'You're tall. Why not try swimming?'" Dr. Joyner
said. "Anything worth doing is worth doing well and anything worth
keeping a score is worth posting a good score."

 

The rules of physics say that distance cycling and distance running
are for small people. Rowing and swimming are for people who are big.
The physics is so exact that when Dr. Secher tried to predict how fast
competitive rowers could go, based only on their sizes and the weights
of their boats, he was accurate to within 1 percent.

 

At first glance, a big rower (and elite male rowers can weigh as much
as 250 pounds) may seem to be at a disadvantage trying to row hard
enough to push a boat through the water. But because water buoys the
boat, weight becomes less of an issue compared with the enormous
benefits of having strong muscles.

 

Their bigger muscles allow bigger people to use more oxygen, giving
them more power. It's like having a bigger motor, Dr. Secher said.
Bigger muscles, with their larger cross-section, also are stronger.
And bigger muscles can store more glycogen, their fuel for short
intense spurts.

 

The same reasoning explains why elite swimmers are big. Great male
swimmers often are 6 feet 4 inches tall, and muscular. And because of
the advantage that large muscles give for sprints over short
distances, the shorter the distance an athlete must swim, the greater
the advantage it is to be big.

 

Tall swimmers also have another advantage: because swimmers are
horizontal in the water, their long bodies give them an automatic
edge. "It's the difference between long canoes and short canoes," Dr.
Joyner said.

 

 

 

 

 

 

The situation is more complicated for triathletes (参加三项全能比赛的运动员), who must run and
cycle and swim. The size that is best for running and cycling is not
good for swimming. Yet in general, swimmers have an advantage, Dr.
Secher said. It is easier for a great swimmer to learn cycling and
running than for a good runner or cyclist to learn to be a good
swimmer. Swimming, he says, is so dependent on technique that it is
hard to become proficient as an adult.

 

The decision for high school coaches, said Hayden Smith, a cross-
country coach at Albion College, is whether to say anything when a
young teenager seems set on the wrong sport. He said he kept mum when
he was coaching in high school. But, he added, the best high school
athlete he ever coached initially went out for football. The football
coach refused to let him join the team - he would not give the boy the
equipment.

 

"He told the kid, 'You'll be a great runner,'" Mr. Smith recalled.

The coach was right. The boy started running and ended up one of the
top 10 in the nation.

 

No one ever told Dr. Joyner not to run. Injuries, though, finally
forced him to look for another sport. He chose swimming, knowing that
his size would be to his advantage.

 

Dr. Joyner got a coach, worked hard on his technique, and recently
ranked 15th swimming a mile in a United States Masters swimming
championship race (for people over age 25) . He started too late, he
said, to know what he might have been as a swimmer.

 

But that is O.K., Dr. Joyner said. He loved running. And there is more
to performance than simply having the right sort of body for the
sport. There is hard work and rigorous training, and, of course, there
is motivation.

 

"I always remember something the late Bill Bowerman said at a clinic I
attended in the late 1970s," he added, referring to the legendary
distance running coach. "Sometimes what matters is not what dog is in
the fight but how much fight is in the dog."

胫前肌，掌管足部内翻和向上弯。通过解剖学分析与实验证明把胫前肌（小腿前肌群）作为一项短跑的专项力量训练，提高掌趾与踝关节的退让与克制工作能力，对缩短着地时间与加快下肢摆动都具有着非常重要的意义。

 

基于上述描述，疼痛的原因可以归结为公路上过分加速跑而产生的冲击所致，同时鞋底的缓冲恐怕也是不够的。

如今 我还活着

而是挺着双腿 单程 9km 40分钟 上班

生活原来是可以重复的