You can throw a line into water. 

Casting is throwing fishing gear into the water. 

Some people use a side swing. This is like a tennis stroke. Others swing the rod high overhead. This helps the bait go even farther.
People use different rods for different fish. Light rods are for small fish. Heavy rods are for big fish. 
Casting can also be a sport. People compete to see who is best. They try to be very accurate. They also try to throw very far.
Casting is how fishers throw gear into the water. 

There are many ways to cast. A sidearm cast is like a tennis stroke. An overhead cast uses a big swing to go far. Some fishers use a roll cast to skim the water. Fly fishers use special rods. They swing the line in circles to build power. This makes the line move like a wave. It carries a tiny fly to the fish.
Fishers pick rods for the job. Light rods work for small fish like trout. Heavy rods work for big, strong fish. Saltwater fishers use very heavy gear. They use their whole body to cast far. 
Casting is also a sport. People compete in tournaments. They try to be accurate or throw very far. They use plastic weights instead of real hooks. The International Casting Sport Federation helps run these contests. It has members in 31 countries.
Casting is the way fishers throw their gear into the water. 

There is a special way that a rod works during a cast. An angler quickly swings the rod forward toward the water. This movement makes the heavy gear pull the rod backward. This action is called "loading" the rod. Then, the rod uses its elastic rebound to spring forward. This spring helps hurl the line through the air. To cast even farther, an angler can shift their weight to their front foot.
Different types of fishing require different casting styles. A sidearm cast is a quick swing like a tennis stroke. A double-handed overhead cast uses a big swing for more distance. Some fishers use a "pitching" technique in small, weed-filled ponds. Fly fishers use a very different method with ultralight flies. They swing the heavy line in circles to build up momentum. This creates a loop that moves like a wave to carry the fly. 
Fishers choose their gear based on where they are fishing. Freshwater fishers might use light rods for trout or black bass. They use sturdier, heavier rods for larger and feistier fish. Saltwater fishers use much heavier rods and lines. In surfcasting, they use two hands to reach far past the waves. These casts can travel many hundreds of meters or feet. 
Casting is also a competitive sport known as Casting Sport. The International Casting Sport Federation was founded in 1955. As of April 2014, it had member groups in 31 countries. This sport uses plastic weights or hookless flies instead of real hooks. Competitors try to reach world records for distance and accuracy. It has even been included in the World Games. 
Casting is the active process of throwing fishing tackle into the water. 

The physics of casting relies on the movement of the rod and the weight of the tackle. An angler quickly swings the rod forward toward the water. The lagging inertia of the tackle causes the rod to bend backward. This specific stage of the process is called "loading" the rod. The angler then uses the elastic rebound, or "springing," of the rod to hurl the line forward. To increase distance, an angler might shift their body weight toward their front foot. This movement should occur in kinematic synchrony with the forward swing of the rod.
Anglers use several distinct techniques depending on their goals. A single-hand sidearm cast involves a swing similar to a tennis stroke. This creates a cast with a relatively flat trajectory. For more distance, an angler might use a double-handed overhead cast. This technique uses a large, overhead swing similar to a kendo strike. Another method is drop-casting, which focuses on fast sinking. In this style, the angler brings the rod high before releasing the line with full force. 
Different environments require specialized equipment and styles. Freshwater anglers often use lightweight, faster-action rods. These are used for panfishing or finesse fishing for fish like black bass or trout. If the water is small or filled with weeds, anglers may use flipping or pitching. They might also use a roll cast to make the lure skim the water. Saltwater anglers typically use heavier rods and lines for larger baits. In surfcasting, specialized two-handed techniques are used to reach past the waves. These casts can travel many hundreds of meters or feet. 
Fly fishing is a unique method that uses ultralight artificial flies. Because the flies are so light, the angler must cast a heavy line instead. The angler swings the line in circles to build up momentum. When the line is released, it creates a loop that propagates like a wave. This wave carries the fly to the target with great accuracy. Once the fly is in the water, it can mimic aquatic insects. This attracts insectivorous fish such as salmon or trout. 
Casting has also evolved into a formal competitive activity called Casting Sport. This is a sport adjunct to fishing, much like shooting is to hunting. The International Casting Sport Federation (ICSF) supervises this sport. The ICSF was founded in 1955. As of April 2014, it had member associations in 31 countries. The federation sponsors tournaments and recognizes world records for both accuracy and distance. Competitors use plastic weights or hookless flies during these events. 
Competitive casting can take place on the water or on athletic fields. There are many different competitive divisions available to participants. These include categories for fly, fixed spool, and revolving spool tackle. The sport has gained significant recognition globally. It has been included in the World Games. It has even been considered for inclusion in the Olympics. The American Casting Association is another major organization in this field. They held their 100th Annual Casting Championships in 2008. 
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