physics

Overhand throw

Overhand throw is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Overhand throw rather than just read about it. In short: The overhand (or overhead) throw is a single-handed throw of a projectile where the object is thrown above the shoulder. The overhand throw is a complex motor skill that involves the entire body in a series of linked movements starting from the legs, progressing up through the pelvis and trunk, and culminating in a ballistic motion in the arm that propels a projectile forward.

Key takeaways

Overhand throw belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Overhand throw to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Overhand throw from memory before moving on to harder problems.

Reference excerpt

The overhand (or overhead) throw is a single-handed throw of a projectile where the object is thrown above the shoulder. The overhand throw is a complex motor skill that involves the entire body in a series of linked movements starting from the legs, progressing up through the pelvis and trunk, and culminating in a ballistic motion in the arm that propels a projectile forward. It is used almost exclusively in athletic events. The throwing motion can be broken down into three basic steps: cocking, accelerating, and releasing. Desired qualities in the action produce a fast, accurate throw. These qualities are affected by the physical attributes of the thrower like height, strength, and flexibility. However it is mainly the throwing motion mechanics and the thrower's ability to coordinate them that determines the quality of the throw. Determining the desired qualities of the throwing motion is difficult to assess due to the extremely short amount of time that it takes professionals to perform the motion.

The motion In the overhead throwing motion the body is a kinetic chain, and the efficiency of the kinetic chain determines the quality of the throw (velocity and accuracy of the projectile). The thrower uses muscle segments throughout the whole body to transfer potential energy from the lower extremities to the upper extremities where it is then transformed into kinetic energy as the projectile is released. This throwing motion is described based on the analysis of professional athletes, mainly baseball pitchers, as they are recognized as having mastered this skill. There are variations in the throwing motion unique to the thrower, but generally the throwing motion is performed as follows.

Starting position Proper technique for the start of the overhead throwing motion involves the thrower's body facing approximately 90 degrees from the intended target, with the throwing arm on the opposite side.

Cocking The first stage of the throwing motion includes the time from the start of the motion to when the shoulder has reached its maximum external rotation. The throwing motion is initiated by first taking a stride toward the target with the leg opposite of the throwing arm. The stride foot should be in line with the thrower's stance foot and the target; placing the foot wide from the target creates a breakdown of the motion due to over-rotation of the pelvis, and placing the foot inward from the target forces the thrower to throw across his or her body. The purpose of the stride is to increase the distance over which linear and angular trunk motions occur, allowing more energy to be produced and transferred up the body. The stride step is performed while raising the throwing arm back to the point of maximum external shoulder rotation. At this point the arm is fully “cocked”. The ball does not move forward during the cocking stage.

Acceleration The acceleration phase is initiated once the projectile begins its forward motion, which is also about the same time as the stride foot makes contact with the ground. The acceleration phase is the most explosive part of the overhead throwing motion, as the projectile's velocity increases from zero to its maximum velocity in this short amount of time. The ball is brought forward while the thrower's body rotates towards the target starting from the stride foot, moving up to the pelvis, followed by the trunk and spinal rotation, and then up to the shoulders. Although not visibly obvious, trunk muscular control is an important factor in high velocity throwing During this phase the thrower's trunk will tilt to the side opposite the throwing arm to allow for greater distance of acceleration, which transfers more energy to the projectile. The acceleration phase ends at the time of the projectile's release from the hand, at which point it has attained its maximum velocity.

Release and follow-through Where the ball is released depends on the distance of the thrower's target; a farther target requires a higher release point and the same applies conversely. The purpose of the follow-through is to decelerate the throwing arm. Once the projectile is released the throwing arm keeps moving across the body. This rapid deceleration is actually the most violent part of the throwing motion, as the greatest amount of joint loading occurs at this stage. For professional baseball pitchers the leg opposite the stride leg also steps forward and squares the pitcher with his target.

Uses The main use of the overhead throwing motion is for competitive sports, including:

Baseball Cricket Quarterback position in American football. Handball Volleyball: serving a ball uses similar overhead motions. Water polo Javelin throw Shot put Dodgeball Axe throwing

Related injuries Frequent use of the overhead throwing motion at high performance levels, such as by professional athletes, can lead to injury. This is due to the large amount of stress placed on the elbow and shoulder, which are the most common areas injured. These injuries can include but are not limited to:

Elbow injuries Torn ulnar collateral ligament of elbow joint (requires Tommy John surgery) Injury to the common flexor tendon

Shoulder injuries Injury to the rotator cuff Injury to the labrum Scapular dyskinesia

Abdominal injuries Injury to the oblique muscles

References

Illustrations

Worked examples

Example 1 — a first encounter with Overhand throw

Start with the simplest possible case. Write down what Overhand throw claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Overhand throw before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Overhand throw ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Overhand throw

In research: Overhand throw appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Overhand throw in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Overhand throw is common in secondary-school and first-year university syllabi. It links to neighbouring topics Biomechanics, Motor control, Motor skills, so understanding it makes those chapters shorter.
In everyday life: Look for Overhand throw outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Overhand throw in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Overhand throw means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Overhand throw out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Overhand throw in simple terms?

Why does Overhand throw matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Overhand throw?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Overhand throw.