Backhand throw in Frisbee breakdown

1. Backhand throw in Frisbee breakdown By Tyler Clafton Exercise Science Class Mr. Wardle period 4

2. Table Of Contents • Brief intro on throwing a frisbee • Set up/Analysis • Backswing • Force producing movement • Critical instant • Follow through • Qualitative/Quantitative analysis • Logger Pro/Maximum velocity • Resources

3. Brief intro on throwing a frisbee Throwing a frisbee straight and accurately is a very complex technique that involves your body to move in certain ways you wouldn’t expect it to, just to throw a frisbee properly. To throw a frisbee properly you must be: • In a proper stance • Have good mobility range with your limbs • The muscles involved should be in good “shape” • Requires good torque from rotation of your body and arms along with leg force

4. Set Up/Analysis Setting up to throw a frisbee is actually a very interesting and fascinating technique most people look past. To start you should have your body relaxed in anatomical position. From this you will be using your hip abductors and flexors to take a step out and wide and planter flexing your leg/foot into the ground. Then following this movement you will be laterally rotating your torso 90 degrees while circumducting your shoulder muscles through the sagittal plane and bringing it to the front of your torso. Doing these three things are just the beginning of throwing a successful backhand throw.

5. Backswing The backswing in frisbee is probably one of the most important things you can do, besides the release. To get the proper motion involved in a backswing, you need to have these following things happening: • The ulna/radius joint to be moving in the motion of a level 3 lever • Circumduction of your shoulder through the sagittal plane • Rotation about the vertical axis As seen in this picture the ulna/radius joint is bent, the shoulder is circumducted, and there is rotation about vertical axis

6. Force Producing Movement The force producing movement involved in frisbee is from the moment when you are circumducting and abducting your arm away from your torso. This motion is causing there to be inertia. But there is also the force from when you are forcing your entire leg to be pushed into the ground, causing an opposite force to be exerted in the other direction. With these two forces acting with each other, it cause there to be a lot of inertia for the frisbee and a lot of force from your shoulder girdle down through to your phalanges. This force is so great, that when mixed with the weight of the frisbee it causes a movement that produces enough inertia to cause the frisbee to fly.

7. Critical Instant The critical instant in frisbee is right when you release the frisbee. When you do this it is taking all of the energy and force you have just created and produced enough inertia to cause the frisbee to fly in a straight, stabile path. The moment the frisbee leaves your hand, it is relying on all the inertia that you created for it to fly. What the picture on the right is showing, is how the frisbee is being released with such inertia that its impossible to notice when it actually leaves your hand

8. Follow Through Follow through in frisbee is the most important thing to do. With out that follow through you would most likely break your arm from the force being produced. During the follow through you are circumducting your arm again through the sagittal plane and along the vertical axis, but this time you are going to let your arm keep swinging around you as far as it can go, causing it to slow down. This will reduce the inertia being produced to be very minuscule, making it easier to stop your arm. As seen on the right

9. Qualitative/Quantitative Analysis Qualitative: • Focusing on my hand, and what it does with the frisbee • Lateral rotation, ulna/radius joint, hip and shoulder abductors, hip flexors • Sagittal plan, Vertical axis • Level 3 levers (ulna/radius joint) and Level 2 levers (ankle planter flexion) • Principle 3, 4, and partially 7 • Law of Inertia, Force, and Action/Reaction • Making sure you do everything correctly

10. Qualitative/Quantitative Analysis Quantitative: • The maximum velocity is 14.393 (approximately 52km/h). With an acceleration from 8.306-14.393, then a decrease from 14.393-9.003. • Hand was very blurry at some points, so it made location my hand extremely difficult at some points. And when recording video, had mom stick hand out a window, so not the most sturdy way to record it.

11. Logger Pro Velocity Graph In the graph bellow, you can see that I have highlighted the section that shows the maximum velocity produced. Which was 14.393m/s

12. Resources • From notes taken in class • Logger Pro graph • Mr. Wardle