The freestyle technique of straight arm shift is a bit controversial. I have found that some coaches either think that using this technique may be more likely to cause shoulder problems, or that young swimmers are not strong enough to use the straight arm technique.
I don’t have Find any evidence that these two ideas are true. We advocate the use of straight arms in the 50-meter freestyle and at the end of all freestyle (including medley) competitions. If the swimmer is particularly comfortable using the straight arm to move the arm, we also consider using this technique in the 100-meter freestyle.
By straightening the arm, the swimmer will reduce the amount of work required to move the arm on the water Increased four times. Swimmers make it more difficult to move armsThe only reason is to be able to gain more power and speed. This is especially important in sprint races. The extra energy and speed of the straight arm movement are obtained through a process we call coupling. The increased kinetic energy of the straight arm shift improves the thrust of the stroke and kick.
If you watch Nathan Adrian’s 100m freestyle competition, you will see his final 8 meters from the high elbow shift arm to the straight arm shift arm, thereby increasing the speed and frequency of the stroke. Compared to any swimmer in my memory, Nathan has won more races with small gaps. He came from behind in the London Olympic 100m freestyle final is his most famous competition.
Although there are some famous swimmers who use straight-arm freestyle techniques in longer events (Janet Evans, Leah Smith, Lotte F Reese), they are all known for their strong professionalism. It is one thing to increase the workload of arm shifting by 30 seconds, but it is another thing to maintain a high intensity of arm shifting within 15 minutes.
The vast majority of shoulder problems are tendinitis or impact problems. These problems are mainly caused by overtraining. Because of our This technique is advocated in short sprints. As long as the training duration and distance are shorter, we have not seen the possibility of it causing any type of shoulder problems, especiallyIs when done correctly.
The correct way to use the straight-arm freestyle technique is to use a more vertical arm-shift Instead of swinging the straight arm to the side. There are three main reasons. First, the vertical arm-moving technique requires the swimmer to further turn the body to each side to facilitate arm-moving. In this body rotation position, the possibility of a shoulder impact when moving the arm is much less. Second, the increased body rotation also adds significant kinetic energy to the coupling and adds more power to the stroke. Third, from a more vertical position, the arm is assisted by gravity in the downward path, resulting in a stronger arm entering the water and greater coupling force. The faster the arm and hand speed when entering the water, the stronger the thrust of the stroke arm.
All backstrokers use straight arms to move their arms. Adolph Kiefer at the 1936 Olympics (he won 1:08) was the last An elite backstroke athlete who successfully used the curved arm to move the arm. Using the curved arm to move the arm in the backstroke can cause serious loss of strength.
This begs the question, "Why don’t all freestyle athletes use straight arms to move their arms?" I believe the answer is related to anatomy . If we stretch our arms in the back, as easily as we can in the front, we may see all freestylers use straight arms to move their arms. Our shoulder restraint makes it more challenging to use a straight arm to move the arm.