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Tennis is one of the most popular and loved game in the world that took its first breath in UK. Earlier Marcelo Jersey , Tennis was considered as the game of the elite class. But, now it is played by all across the globe. The two most important equipment of tennis game are: Racket and Ball. The first tennis ball was made in the 11th century with leather stuffed with hair or wool.

There are two types of tennis ball:

Pressure-less tennis ball has a solid core with a property that the more the wear and tear of ball is, the more it will ball will flight, bounce and spin.

Pressurized Ball has a hollow core filled with air to be more bouncy but the negative side is that the bounciness is short lived only. The air seeps out of the tennis ball during the game Luka Modric Jersey , a pressurized ball loses its bounce gradually.

The felt covering on a ball is designed with a specific court surface in mind. Like, Regular duty for indoor and clay courts, Extra duty for grass and concrete courts and High Altitude for high altitude regions.

<"http:www.racketcitytennis-balls.htm">Tennis balls come in four speeds: slow, medium Lucas Vazquez Jersey , fast and high altitude. Medium speed ball is most commonly used and preferred most of the tennis players, whereas as the most players avoid using tennis ball with fast speed. The tennis ball with slow speed is favoured by players who need more time to get ready to hit the ball. The High altitude speed ball is created for games which are played where the air is thinner

The International Tennis Federation (ITF) has laid down certain criteria for size, weight, deformation Kiko Casilla Jersey , and bounce. The standard tennis ball must have a diameter between 65.41 mm and 68.58 mm. The standard tennis ball must weigh between 56.7 g to 58.5 g.

The standard tennis ball must have rebound height of 135 to 147 cm (53-58 inches).The standard tennis ball must be tensed with environment having temperature of 20C 68F, humidity 60% and atmospheric pressure of 102 kPA. The International Tennis Federation (ITF) has approved 3 types of balls depending upon the surface of the play :

1. Ball Type 1 (fast speed) is intended for play on slow pace court surfaces.
2. Ball Type 2 (medium speed) is intended for play on medium-slow, medium and medium-fast pace court surfaces.
3. Ball Type 3 (slow speed) is intended for play on fast pace court surfaces.

A ball which is granted ITF Approval is approved by the ITF only on the basis that it has been found to conform to the current Rules of Tennis and is therefore considered suitable for use in tournaments played according to the Rules of Tennis. If you are looking for the five best exercises for gorgeous abs, you certainly are not alone! A simple Google search will soon show you Keylor Navas Jersey , however, that the five best exercises for gorgeous abs are not things that are easily agreed upon. You'll find some articles that want you to focus solely on crunches, and other ones that simply want you to work with weight devices. When you are looking for the perfect exercises, it might help to remember that they really don't exist; the best you can hope to find are the best exercises for you! Take a look below for some exercises that should get you on your way and help you figure out what you need to work on.

The Bicycle
Lying on your back Karim Benzema Jersey , you put your hands behind your head and start bringing your knees and their opposite elbows together in turn. Essentially, you should be creating a pedaling motion with your legs that will last for 12 to 20 repetitions. This is a great exercise to get you started because it gives the oblique muscles at your waist a great workout as well well as targeting the muscles known as the rectus abdominis, which will form your six pack.

Exercise Ball
The exercise ball is a great way to work on both core control and toning and many people get some great definition and delineation when they are working with it. By focusing on keeping the ball stationary as well as working with their crunches or balance, many people have found that exercise balls can give their exercise a huge boost in terms of results. Try doing your crunches on the exercise ball Jesus Vallejo Jersey , by lying down with the ball under your lowermid back, your knees slightly bent. From this position, cross your arms over your chest or place your hands behind your head and start doing your crunches.

Plank Pose
If you have an experience with yoga (which is a great way to build up tone and definition) you already know about plank pose. Lie flat on your stomach and lift yourself up using your forearms. From there, keep your whole body as straight as you can and in as plank-like a position as you can. Hold it as long as you can James Rodriguez Jersey , remembering to breathe slowly and evenly. This is another good core control exercise that will help you concentrate on the areas that need attention.

Reverse Crunch
Lying flat on your back, bring your knees up to your chest and than curl your waist up. Like the normal crunch, it works your abdominal muscles, and many people consider it an important part of the workout in terms of keeping things well-rounded and even. When you are thinking doing this exercise Isco Jersey , try doing it right after you do your normal crunches, and feel the difference the change in activity makes. This will keep you more aware of how your body is moving.

Chair Press
Sit on a chair and, gripping the handles, tense your abdominal muscles to bring your knees in close to your chest. It is important when doing this not to overextend or arch your back Iker Casillas Jersey , as you will be targeting the wrong muscles. When you bring your knees and legs up, hold it for a long count of three to five seconds and then do a long, slow release; do not simply drop them! This is a good way to figure out h. Cheap Jerseys China Cheap NHL Jerseys Cheap NFL Jerseys China Cheap College Basketball Jerseys Cheap MLB Jerseys China Cheap Soccer Jerseys China Cheap New NFL Jerseys Cheap College Hockey Jerseys Cheap NBA Basketball Jerseys Wholesale Hockey Jerseys
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