The yellow jersey The yellow jersey, still worn by players today, went across football fields and bleachers. It was first used in the 1930 World Cup when it was awarded to Argentine player Juan Dominguez Moreno. He had been involved in an accident while training with his national team which left him paralyzed from the chest down.
The white shorts/socks The white shorts/socks, also known as la roja (the red), are the traditional uniform colors of Brazilian football (soccer).
They were originally black but were changed after the 1934 tournament when they were replaced with red shorts and socks. The new look became popular and is now standard for all professional clubs.
During this time, there was no provision for substitutes so teams usually played one up front with only a goalie as back-up. This often led to heavy casualties among the forward players due to the intense physicality of the sport. Modern rules were introduced in 1938 and have remained largely unchanged since then.
Currently, most clubs wear yellow shirts and white shorts/socks. A few remaining clubs like Flamengo or Vasco da Gama still use black as their main color.
"That yellow shirt is holy to Brazilians," says Carlos Alberto, captain of the famous 1970 World Cup-winning team. "We feel pride when we wear it, but it also carries duty, a responsibility to inspire and excite."
The story goes back to 1890, when the Brazilian flag was first adopted. It's a yellow banner with a green pine tree in the center. But not everyone loved the new national symbol. Many public figures at the time wanted to replace it with a white flag with blue stripes, like the American one. They thought it would be easier for foreigners to understand.
But those fighting for keeping the yellow flag came from all walks of life: farmers, workers, students. And they won out over their opponents. Since then, the yellow flag has become synonymous with Brazil on international stages.
So why do Brazilians love this color so much? "Yellow brings good luck to anyone who wears it," says Roberto Gomes Peres, a football legend who played with Pelé on the 1950 World Cup-winning team. "It's believed that if you wear it, you won't get sick or have trouble with your legs."
Brazilians also believe that if you wear yellow, you will be successful in your endeavors. It's a popular color among builders and contractors who want to attract clients.
The home football kit's yellow and blue color combination is inspired by the Swedish flag, which is blue with a golden-yellow Scandinavian cross and has been the color of the home jersey from its inception. The away shirt is white with red trim.
Sweden's first match was on 8 June 1908 against Norway. They lost 1-3 at home in Oslo. Swedes haven't won yet since then but the country's name has become popular again after reaching the quarterfinals of the 2002 World Cup.
There have been attempts to change the national team shirt colors during periods of political instability or turmoil. In 1971, for example, supporters demanded that the national team wear black clothes in memory of those killed during the 1970 Stockholm bombings that were blamed on communists.
In 2009, the new coach Lars Lagerbäck announced that the national team would play in green shirts with white stripes down the side instead of the traditional yellow and blue. The new design was supposed to be used until 2013 when another new design is expected to be chosen by public vote.
However, only three games have been played under this new setup and it isn't known how many games will be played in the future.
Currently, there are no plans to change the Sweden shirt color again.
The vest that football players wear beneath their jerseys (and occasionally over them when training) has a GPS monitoring device. In practice and games, you expect a player to do X, Y, and Z. When people begin to deviate from those standards, it might be for good or ill. That's why it's important to know what they're doing with this equipment.
Here are the most common things that we find when looking at their vests:
GPS monitors: These devices record information about speed, distance, altitude, and more. Football coaches use them to track game practices and playbooks. They also use them to monitor individual players during rehabilitation programs or after surgery. The quality of today's GPS units makes it possible to collect very detailed information about an athlete's performance.
Heart rate monitors: These small sensors measure your heart rate throughout the day. Coaches use them to check whether players are exercising at a high intensity enough during practice. They also can reveal if someone is suffering from exercise-induced cardiac stress, which could indicate an underlying health problem.
Accelerometers: Also called "gongs," these devices measure linear acceleration along three axes (x, y, and z). They're used by coaches to see how closely players follow instructions during practice and games.