Weplay Moms

Parents, it is critical that your daughters learn early in their sports careers (ages 10, 11 or 12) the proper jumping and landing technique in order to train properly for their sport, prevent injury and increase their vertical jump. Did you know that girls are 4 to 6 times more likely to suffer an ACL knee injury in comparison to boys in the same high risk sports? Alarming...Yes, but this trend can be reversed with the proper conditioning program.

Studies show that girls jump different from boys and these differences are predisposing girls to a greater amount of leg and knee injuries due to bad technique on take-off and landing from jumps. We know that girls play sports in a more upright position causing weak trunk, hip and leg musculature. Girls also jump with incorrect knee position and land in an upright position thus allowing the knee to move side to side and rotationally during landing.

Improving technique and getting stronger in the hips, legs and core will decrease a girls chances of sustaining a leg injury. Keep in mind that girls are made different than boys. Girls have a wider pelvic angle and increased low back curve, factors that result in the femur, or upper leg bone, rotating inward and the knees assuming a “knock knee” position. This “knock knee” position places stress on the Anterior Cruciate Ligament (ACL). Combine these factors with landing forces up to five times their body weight, and they are at a high risk for injury. These ground reaction forces place a great amount of tension on the muscles, tendons, ligaments and cartilage surrounding the knee. So, girls need to get on a good strength training program and learn how to jump and land to protect the knee.

Below, I have listed the keys to developing correct form on the take-off and landing from a jump. Girls should try to perform each and every jump with good form.

Take-off

1. Use your arms when you jump, meaning, take your arms back behind your body for balance and to prepare for the jump. Jumping is a coordinated movement involving many muscle groups in the body. The muscles in the shoulders, back, chest, arms, core, hips, legs and feet all work together to put you in the proper position for take-off and to propel you up into the air. Strengthen these muscle groups for increased stability and power.
2. Use the thumbs-up rule, which is driving or punching your arms and hands with thumbs upward on the jump. This arm and hand motion can account for approximately 10 percent of the height jumped.
3. Knees should be bent at least 60 degrees or greater and hips flexed 30 degrees or greater before the take-off. In other words, bend your knees more and squat down farther before you jump. Your ankles will be flexed 25 degrees or greater if you do this.
4. Keep a neutral spine before take-off and not a rounded back or sunken chest position. You also don’t want to be bent over too much at the waist.
5. Keep knees over your feet. We don’t want to see “knocked knees” while in the squat prior to the jump.
6. Jump straight as an arrow. Maintain a tall hips posture and project them upward (and at times forward) for height and distance.

Landing

1. Try to land softly, light as a feather, we don’t want to hear a loud landing.
2. Land on the ball of the foot and sink into your heel.
3. Land with flexed hip, knees and ankles to absorb the landing forces.
4. Maintain a straight back, neutral spine position.
5. Land with chest over knees and knees over the feet. Again, don’t land “knock kneed.”
6. With multiple plyometric movements, try to be like a super ball. Be as quick and elastic off the floor, the idea being to spend the least amount of time in contact with the floor.
7. Land on two feet if at all possible to help absorb the landing

When performing a jump training program always remember that Quality is better than Quantity. It is better to have six quality jumps than 10 sloppy ones. Athletes should have a good strength and flexibility base before starting on a jump training program.