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There are 17 events this weekend alone!
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But on the 42-kilometer track,
There is always something that makes the runners depressed.
That's when the rhythm is perfect.
The laces suddenly opened!!!
Department is still not tied,
This is a problem!!!
Hesitate again and again,
In the end, I chose to tie the laces.
Of course, for the safety of yourself and other runners, you must pay attention to these two points about the laces in the running horse!
1, avoid running steps to stop
In a marathon, a sudden sudden stop can cause great damage to the heart.
In the game, in order to cope with high-load exercise, our heart needs to increase the heart rate and myocardial contractility under the regulation of neurohumoral fluid, and strengthen the blood discharge of the heart for high-load exercise.
Once the laces are suddenly tied to stop the movement, this demand drops immediately. However, it takes a process for the heart to discharge blood to return to normal, so after strenuous exercise, there should be a slow adaptation period.
Otherwise, once the movement is stopped suddenly, the tissue may be over-congested, heart failure and arrhythmia due to high blood circulation.
Next, a large amount of blood stagnates in the lower limbs due to sudden loss of muscle compression, and the amount of blood returned to the heart is reduced, which may cause short blood supply to the brain. Therefore, it is prone to dizziness, vomiting, falling to the ground, and loss of consciousness.
So it is best to lift your shoes and step on the railings instead of squatting.
2, stepping on the phenomenon
When you squat down, the runner running behind you can easily hit you on the body!
If the shoelace suddenly opens when it starts, it can't be squatted and it will kill people.
Be sure to jog to the roadside where no one is.
Saying that the laces are fastened.
But after running for three or four kilometers
The laces are actually. . .
Open again!!!
(The inner heart crashes, forcing me to die?!)
Why are the laces that are just fastened always loose?
?
Researchers from the University of California, Berkeley, used a high-speed motion camera to film another video of a runner running on a treadmill.
In fact, slowing down the video, you can see the entire process of shoelace release from the high-speed camera.
The researchers said: the foot is on the ground + walking and swinging causes the shoelaces to loosen!
The researchers installed an accelerometer on the tongue to measure changes in the force on the knot. They found that when people walked, the combined impact and acceleration of a shoelace totaled up to 7 G.
This is almost equivalent to the gravitational acceleration experienced by the Apollo spacecraft when it re-enters the Earth's atmosphere. When the soles of the feet touch the ground, the laces are very stressed, causing the laces to deform.
Further experiments have shown that simply squatting up and down is not enough to make the shoelace knot loose, as well as swinging back and forth. The swinging movement of the shoelace also adds extra force.
The two forces are interlaced to loosen the laces. As the direction of the force changes and continues to pull the laces, this repeated impact eventually causes the lace knot to loosen.
So what method can reduce the loosening of the shoelace?
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A foreigner named Ian opened a website dedicated to researching and sharing the method of tying shoelaces. He summed up hundreds of ways to tie the laces, but most of them are about how to tie the laces of individuality. However, there are still some special laws to prevent loosening.
1. Cross lace method
The most common method of tying the laces is to first cross the laces and then tie the bows so that half of the bows will become easier to loosen.
To solve such problems, pay attention to the order when starting the knot. When your cross rope is on the left rope (the left rope presses the right rope), you must have the right rope on the bow (right rope). Press the left rope) and vice versa.
In this way, the knot shape of the bow will be correct and the chance of loosening will be greatly reduced.
Left: The correct knot is not easy to loosen right: the wrong knot is easy to fall off.
There is also a more insured option, that is, when playing a bow, the two sides of the shoelace are left and right.
When you complete the bow, you can make a half-turn, so that the shoelace is not easy to loosen, which is more suitable for the runner to tie the shoelace.
Tied knot type
2, cross-lace method advanced
When you cross the shoelace, you can increase the friction by winding more rounds. Although it is just a little more round, it seems unremarkable, but the added friction is very obvious. Once the shoelace is tightened, It will hardly move any more.
Generally, it is most suitable for locking the first half of the running shoe. Its function is to fix the instep and reduce the problem of lifting the ankle. Because the ankle lift increases the chance of friction between the foot and the sole, blisters are easily generated.
There is another way to lock the shoelace and reduce the sliding of the foot in the shoe, that is, when wearing the shoelace hole, it is worn from top to bottom, and the shoelace is pressed to reduce the movement of the shoelace.
Left: Increase the friction of one turn around the right: the general winding method.
3, "eight steps to catch up" tie method
Of course, if your running shoe laces are round laces, then you need to use the advanced enhanced version of the cross-lacing method - "eight-step rush" lacing method!
Dare to name the martial arts novels, this lacing method can be said to be the strongest and most suitable for marathon enthusiasts!
Everyone, "New Horse" and "Old Horse" may have to look carefully!
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4, tie black technology Zubits
Zubits is a magnetic shoelace buckle that is easy to use.
First put the shoelace into two powerful magnets. Because the magnets attract each other when wearing shoes, directly tie the two magnets to the shoelace.
It is said that this artifact is on a treasure of 28-139 yuan, whether you need to run friends to consider.
Professional marathon runners laces principle:
Fixed ankle position
Elasticity is always moderate
Run downhill without hurting the toes
The tongue is raised as much as possible to prevent wear on the ankle front
Since each runner's foot type is different, in order to ensure the above principles, the method of tying the shoelace will be different.
Tied shoelace method for 5 different foot types
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Tied up one: for the high arch population
If you are a high-footed runner, you should pay attention to reducing the pressure on the tongue when tying the laces, so that the feet are more comfortable.
An unfolded lace-up method can be used to minimize the stress on the laces when they cross each other at the center of the tongue.
Another way is to cross the laces from the middle of the shoe and walk around from the middle to the head laces.
Tied Method 2: For the forefoot wide and the foot is narrow
The first pair of shoelaces are tied from the head of the shoe to the middle position, and the second frame is tied from the middle to the bottom.
The two pairs of laces can be used in different degrees of tightness so that the comfort can be adjusted for different foot parts.
Tied three: prevent toe pain
At the lowermost eyelet, the ends of the lace are penetrated inwardly, one side is directly passed out from the uppermost one of the opposite sides, and the other side is alternately passed through each of the eyes on both sides. Put on the knot on the top of the eye.
This way it gives more space to the toes, liberates them to the greatest extent, and helps to relieve problems like toe bending (hammer toe), toe corns, toe bleeding and toenail.
Tied to four: prevent back pain
If you often feel pain in your back when running, it may be that the laces are too tight.
For this problem, when tying the laces, you need to start with the cross at the bottom of the eye. After the third eye is worn out, the next eye from the same side is inserted and then the next one is worn out. After the second eye is worn out, the cross crosses the knot from the opposite side of the last eye.
This will reduce the pressure from the shoe facing the foot (instep).
Tied Method 5: Prevents the heel from slipping
Heel slip is a problem that many runners encounter during running.
In this case, you must first fix your heel in the most comfortable position. Then take the normal cross-tied shoelace method, pass the shoelace through the two lace holes near the ankle, and then tie the knot.
In this way, you can play the role of fixing the heel.
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