1. What types of tennis shoes

There are three types of tennis shoes today: hard ground shoes, clay shoes and grass shoes. Let me introduce it to you:

1. Grass shoes are full of protruding small dots

The strange venue of grassland as tennis enthusiasts has always been viewed, so sneakers on the grass field are also rare.In fact, the grass is the wet and slippery venue (none of them).When the players are Running on the grass on the grass, the grass will be broken quickly.The juice of the grass is mixed with fiber and soil to fill the soles quickly without falling off.Over time, players will become skaters on the grass.After studying for a long time, the designer found that this densely protruding small dot can avoid grass and mud attached to the soles of the shoe.At the same time, the dense origin can also be relatively improved and preventing the slide, which is a bit similar to the protruding cylindrical nail shoes on the football field.

2. ceramics shoes have a deeper and wider texture groove and protruding polygon small block

As a relatively slippery pottery venue (sand land, red earth field), the shallow soles of the hard floor shoes will be quickly filled by sand soil to lose grip.Therefore, clay shoes deepen and widen the texture of the soles, which makes the soles difficult to be filled by pottery.At the same time, with the Running lines, the pottery will be slowly opened.Those protruding blocks or polygonal pieces also play a role in small scrapers.While increasing friction, it is easier to fall.

3. Hard shoes have tight human characters or inverted gradient patterns

The hard ground court is the most common type of venue, and it also makes hard floor shoes the most common type of tennis shoes.Its pattern design is mainly tightly tightly human characters or inverted trapezoidal grooves.This is similar to the soles of the shoe of daily sneakers. The main role is to enhance the grip effect on the venue and make every step of you solid.

In addition, the soles of red soil and hard shoes are very similar. Here I teach you two skills to distinguish:

1. Hard shoe shoe hill -shaped or V -shaped lines are not the whole side. The red soil soles are the entire V -pattern road on the whole side (the red soil soles look neat, and the hard ground soles look messy).

2. The soil of the red soil shoe is raised and soft, and the hard sole is harder.Because the soles of red soil shoes are soft, they are not wear -resistant.

2. How to buy tennis shoes

When choosing tennis shoes, you can consider from the following aspects:

1. The style of playing

(1) Bottom player

The bottom line players mainly hit the backcourt of the stadium. The types of sneakers they need are more horizontal support.Because the soles are constantly moving, the soles are highly durable.

(2) Serving and Internet players

In front of this type of player more control network, it usually moves the feet behind more frequently when serving, so with durable toes and inner shoes are the most basic.

2. stadium type

Using different types of stadiums will have a different impact on the type of tennis shoes.The hard ground court requires that the shoes have higher durability, and the soft stadium, such as red soil, requires greater traction.

(1) Hard stadium

The design of hard tennis shoes takes into account more durability, providing a more flexible outsole and upper, and also has better support performance; on the hard ground, the soles may wear faster, and be sure to check it. Be sure to check it.tennis shoes are changed in time.The upper and outsole materials are cortical or ethylene -based material, which is more tough.

(2) soft ground court/red soil stadium

tennis shoes will consider the traction of the sole without damage when designing.

(3) A variety of venues

The design of this tennis shoes is suitable for various venues, which is convenient for players to play sneakers during various venues.

3. The right degree of foot type and shoes

Determine your feet before choosing tennis shoes.The feet are generally divided into three basic types: inside, normal feet, and outward (internal rotation).

Each pair of shoes is suitable for different people, each foot type and height, and arch.If you are not sure of the type of your feet, the simplest "wet test" can be determined.Simply put, wet your feet and step on a piece of black building paper.The characteristics of the footprint determine the type of the foot.

(1) Inside (internal rotation) overpowers

If you see a complete mark, and full and clear, it means that your feet are over -over.In the over -overrunrs, almost every step is to turn their feet inward, which requires a pair of stable tennis shoes to achieve better support effects.

(2) Normal foot neutral

If you see moderate space and visible arch areas, it means that your feet are normal, and you can try any kind of tennis shoes.

(3) Insufficient pride (inner rotation)

If the outside of the footprint is narrow and it is almost interrupted, your feet belong to the outward type.The fuggers are lacking inward inward during the movement. Choosing more flexible shoes can relieve and reduce the vibration while moving quickly and horizontally.

[Mountaineering Shoe Size] How to find the size of the mountaineering shoe size, how to find the size that suits you

mountaineering shoes are used for long -distance travel, mountain climbing, heavy Hiking, etc. These more hard walking activities have more than half an hour, and their feet begin to fever and swelling. When the intensity is greater, slight swelling often occurs.

In addition, the test of the feet is very large when the weight is down. The mountaineering shoes need a certain amount of looseness to make the feet move. If the size is appropriate, or the shoes are relatively tight, the foot will be painful for 10 minutes to walk down the mountain road.

The coordination of mountaineering shoes is the medium -thick cotton socks or functional Outdoor socks, which is conducive to sweat and protection.Should not wear a slippery and thin nylon socks.

The number of mountaineering shoes often has different standards, such as the United States, Europe, and the European and domestic numbers are consistent.However, even if the same number standards, different shoes will be different.European and American products are often divided into men's and women's models. women's shoes are slightly narrower than men's models. women's models often 36-42 and men's models 39-46.The same is the same as the 41st, or on the 40th, the length of the women's model is slightly greater than the male model.The difference between the width of men and women has little impact on our use. It is often wearing men's models with comparison, thin feet (regardless of men and women) can wear women.

If it is an ordinary mountaineering shoes, especially the whole Skin, it must be one to two sizes. If you put double -layer boots at high altitude, because the outer layer is plastic, it will not shrink, and you must choose according to the normal size.

The trial is a king. Before trying to penetrate the mountaineering shoes, put on thick socks (if not, put both on one foot), put on mountaineering shoes, and put on shoelaces.

Trying steps for mountaineering shoes

1. In the case of not tie the laces, put your feet to the back heels of the hiking shoes, and feel the support of the soles on the feet, especially whether there is a reasonable arc at the foot of the foot;

2. Whether the left and right sides of the mountaineering shoes are suitable, there should be no too much gap, there should be a large gap in front of the toes;

3. Lean your feet towards the tip of the mountaineering shoe, the roots and heels should have a half to two fingers;

4. Tightening shoelaces, feet roots, ankles, feet, and other parts should be reasonably supported. You cannot have space or too tight anywhere;

5. Strike the toes of the Hiking shoe on the hard ground (don't let the shop owner see it, it will be distressed), the toes should not be topped to the tip of the shoe. If it is, it means that the shoes are too small;

6. The next choice is to minimize the Running -in period of the climbing foot as much as possible.After tie the shoelaces, do not heel too tightly, the ankle of the high -top shoes should not be too tight, and the tongue should not be too pressed.In fact, as long as you choose the right size and shoes, you may not need to run in.

1. The correct way to ride a helmet

cycling motion is also called a bicycle motion. It is a kind of sport that uses bicycles as a Tool race. As a sport, it is important to do a good job of safety protection.The safety of the head can also reduce the resistance through special design and improve the rider's achievements.However, the Bicycle helmet is not just worn casually. You also have to master the correct method of wear. So how do you wear a cycling helmet?

1. Open the band and sort out other accessories of the riding helmet to facilitate wear.

2. Put the level of the helmet on your head and slowly tighten the bundle until you feel comfortable.

3. Adjust the band below the ears and adjust the position of the band.

4. After the band is adjusted, tighten the band close to the chin and buckle the bundle band buckle ring.

5. After completing the above operations, make sure that the range of the helmet movement does not exceed 1 inch (1 inches = 2.54 cm). At the same time, it is guaranteed that the helmet without loosening the front helmet will not fall off and it means that you can wear it.

2. What are the precautions for wearing Bicycle helmets

1. After the helmet is worn correctly, it should be ensured that the front of the helmet should be a horizontal line above the eyebrow heart. The two sides are close to the temples, and the position of the helmet is not impartial.

2. Most out of control and collision are fell forward, so the helmet's wearing angle should not be too much leaning, the front of the helmet should be pressed to the eyebrows, do not expose the forehead, but too much forward will cover the sight.As a result, the helmet fixed mechanism cannot be well fixed, and it is easy to cause a helmet to move or wear uncomfortable in the bumps.

3. The buckle position also has a direct impact on the comfort of the helmet. The correct position of the "Y" font buckle should be located at about 5-10cm below the ear.Tighterness will affect comfort.

4. After wearing a helmet, you should pull down the loose regulator in the back of the head, so that the regulator can fully wrap the back of the head and then adjust the tightness.Then, the twisting knob allows the headband to give a certain pressure beam and tighten the head. It is better to shake the helmet with both hands without loosening.

5. The tightness of the band of the chin is based on the standard of one finger, and Taisong will not be able to fix the position of the helmet.The helmet needs to be worn correctly to exert its greatest effect.

6. Regardless of whether or not you fall or collide, the cyclist should change the riding helmet every three years.Because even if the helmet has not collided, the sun exposure and sweat erosion can make the safety beam band aging, thereby weakening the surrounding fitting system and damaging the protection performance of the helmet.

3. What are the principle of protection of a helmet

The principle of cycling helmet is to play a protective role by absorbing the impact of collision in the inner layer of the foam. Each cycling helmet hasMaterial orEPP (foam polypropylene) foamIn the inner layer, when the accident occurs, the inner layer of the foam will buffer collision to reduce accident damage.

It should be noted that the cycling helmet made of EPS (foam polystyrene) material, once the EPS bubble is crushed and deformed in the accident, it cannot be recovered and reused.The inner helmet made from EPP (foam polypropylene) foam can be restored to use again after being hit, but the intensity of its absorption impact is far less than the EPS bubble. ThereforeRiding a helmet, after all, safety is the first.

[Keep warm life jacket] What is the method and precautions of warm life jacket for warm life jacket

Insulation -Introduction

Insulation clothes, that is, IMMMMERSION suit, also known as life service, heating water -soaked heating suit, insulation life service, navigation and navigation life service.

Type I life service

It meets the requirements of the SOLAS Convention and the IMO specifications, with dense water, buoyancy and natural insulation functions. It is equipped with whistle and life jacket lamps.It connects clothes and pants to protect the entire body except the face, and it is suitable for various sailing ships, petroleum platforms and other marine operations.The product is recognized and tested by the Chinese Class -grade agency (or other relevant qualification units such as carriers in other countries).

II -type life service

Requirements that meet the requirements of imo LSA and MSC81.Armat which has a heat -watering heating suit with buoyancy and no need to wear life jackets.Equipped with whistle and life jacket lamps.The fabric is made of high -quality neoprene composite material.It has waterproofing, insulation, temperature resistance, flame retardant, oil resistance, and stipulated strength. It is a multi -layer composite, non -toxic, non -irritating odor, and will not be due to sea air, seawater, fresh water, oil and fungi.Affect use.This product is recognized and tested by Chinese carriers.

Insulation -material performance

Fabric: nylon waterproof cloth chlorite rubber CR composite material second -generation product fabric is: 5mm club rubber foam rubber (5mmcr).

Insulation and buoyancy material: polyethylene foam chlorherye rubber CR composite material

Dressing time:

& lt; 2min

storage temperature:

-30 -65

Specification size:

XL type: suitable for those who are more than 1.85m height.

Type L: Suitable for 1.75m-1.85m height.

Type M: Suitable for those who are less than 1.75m.

waterproof performance:

The wearer floated in the water for 1 hour, and the amount of water in the clothes was less than 200g.

Insulation characteristics:

Wearers soak for 6 hours in a static water flow at 0-2 C, and the body temperature decreases does not exceed 2 C.

Buoyancy performance:

The wearer can turn to the upward position of the face within 5 seconds. The water surface is 120mm exposed in the mouth and nose, soaked in the water for 24 hours, and its buoyancy loss is less than 5 C.

Insulation -Dressed in the insulation service essentials

1. Take out the insulation suit and open it.

2As well asPut on the insulation.

3As well asKneel down and pull your leg zipper.

4As well asPull the waterproof zipper on the chest to the face.

5As well asPull the edge of the face to the bottom of the chin before the water.

6As well asThe insulation clothing should be worn along with the recognized life jacket.

7As well asTake out the gloves from the Sleeve pocket.

8As well asPut on gloves and pull up the zipper.

Insulation -the main points of the insulation utensils

1As well asTake out the insulation appliance and open it.

2As well asAfter putting the use of the utensils from the top, pull it to the face, and pull it to the face

3As well asTighten the insulation Tool on the face.

Insulation -maintenance and precautions

1As well asThis product is stored in a low -temperature, ventilation, and dry environment, and it is strictly prohibited to place in high temperature environment or long -term exposure; avoid contact with corrosive chemical preparations such as acid -alkali salt; strictly prohibited pressure;Essence

2As well asDuring the storage and application process, you should avoid contacting or friction with the sharp objects to prevent the waterproof effect from being stab or grinds the waterproof layer; pay attention to mouse harm.

3As well asAfter application, turn out the inner layer of the clothing in time, place it in a dry and ventilated place, and the drying accumulation exists in the internal water; if you need to clean it, use a neutral detergent and soft brush.

4As well asDuring the preservation process, you should not turn on the life clothes light switch, and you can only turn on when needed, otherwise it will damage the life of the life jacket or consume the power of the lithium battery.

5As well asCheck the clothing regularly. If damage and leakage are found, it should be repaired in time.

1. Where is the difference between casual women's pants and sports pants

casual women's pants, opposite to the formal pants, just wear casual and casual women's pants.sports pants are more focused on exercise. There are special requirements for the material of the pants. Generally speaking, the requirements for sports pants are easy to sweat, comfortable, and unintelligible, and are very suitable for intense exercise.So what is the difference between casual women's pants and sports pants?

1. The degree of easing is different.sports pants are relatively loose pants, suitable for Running, playing basketball and other strenuous exercise, and will not stick to the Skin.casual women's pants, no sports pants are loose, suitable for daily wear.

2. Different fabrics.sports pants are mainly used as chemical fiber or cotton as the main material, which are better breathable and strong, and are convenient for sweating.casual women's pants fabrics are relatively versatile. There are denim fabrics and Cotton and linen fabrics. The fabrics are more comfortable. The main types include radish pants, straight pants, wide -leg pants, and so on.

2. Can casual women's pants be worn as a sports pants?

I have simply understood the difference between casual women's pants and sports pants, so can casual women's pants be worn as sports pants?

There is no problem when wearing sports pants when it is not high -intensity or leisure.The style of casual women's pants is very close to sports pants, so the appearance is indeed similar, but the functions, characteristics, etc. of the two are different, so it can only replace sports pants in appearance, but it cannot be replaced by function.