Golf Smart Academy
One of the simplest ways to understand how you create speed in the golf swing is to compare it to two different medicine ball motions: a slam and a sidearm throw. Both can produce force, but they organize that force very differently. In golf, that difference affects not only how fast you swing, but also how you deliver the club, control the face, and manage the path. If you tend to cast, scoop, get steep in transition, or struggle more with your longer clubs than your short irons, this concept can help you see why.
Two Ways to Apply Power to the Club
At a big-picture level, you can think of the downswing as using one of two dominant power patterns.
The med ball slam pattern
Imagine lifting a medicine ball and driving it straight down into the ground. That motion is more vertical. Your body feels like it is chopping down, pulling down, and dumping energy toward the ball.
In golf-swing terms, this often shows up as:
- A more steep body motion in transition
- An earlier, more aggressive arm throw
- Cast tendencies
- A scoop or flip through impact
- Speed that gets spent too early rather than delivered through the strike
The sidearm throw pattern
Now imagine making a backswing and then throwing the medicine ball out toward the target, more like a sidearm toss. That motion is more rotational. Instead of driving force straight down, you are turning and sending energy outward and around.
In golf, this tends to create:
- A more shallowing delivery
- Better sequencing from body rotation into arm extension
- More of a wipe or rotational release pattern
- Arm extension that happens through the ball, not at it
- Improved shaft lean and flatter low point control
That does not mean one player never uses vertical force. Every good swing has a blend. The key is which direction dominates when you are actually delivering the club.
Why the Difference Shows Up Late in the Downswing
This is where many golfers get confused. Early in the downswing, the two motions can look similar. From the top, both players may appear to be starting down with speed and intent. The real difference becomes visible a little later, in the delivery zone.
That is the important idea: how you apply force reveals itself most clearly from mid-downswing into impact, not necessarily in the first instant of transition.
If you are using more of the slam pattern, the club often starts to dump too early. The wrists unhinge sooner, the arms fire harder, and the club wants to crash downward into the ball. That is where you often see the classic cast or scoop.
If you are using more of the sidearm throw pattern, the club tends to work more across and around as the body keeps turning. You may notice:
- A more retained trail leg
- The trail elbow staying bent a bit longer
- The club approaching from a shallower angle
- Extension happening after the strike instead of before it
That is a major reason this concept matters. You are not just trying to look better on video. You are trying to direct force in a way that produces speed without spending it too early.
How This Relates to Cast, Scoop, and Steep Delivery
If you fight a cast or flip, the med ball comparison is useful because it gives you a clearer cause. Many golfers are not casting simply because their hands are doing something wrong. They are casting because their entire power pattern is telling the club to go down too soon.
When your body applies force in a chopping, vertical way, the club often responds by:
- Releasing early
- Getting steeper into the ball
- Moving the low point around too much
- Adding loft through impact
- Making face control less reliable
That is why a scoop and a cast are often connected to a steep transition. The club is not just misbehaving on its own. It is reacting to the direction of force you are creating.
By contrast, the sidearm throw pattern tends to support a shallower, more rotary delivery. As your body keeps turning, the club can fall into a better slot, the release can happen later, and the strike can be compressed rather than dumped.
This is also why players who use the rotational pattern often look like they are covering the ball better. Their speed is being delivered through the strike instead of being thrown at it.
What to Look for on Video
If you want to know which pattern you tend to use, face-on video is especially helpful.
You are looking at the section of the swing from roughly mid-downswing into impact. In that zone, ask yourself:
- Does the club appear to dump downward early?
- Do the arms straighten too soon?
- Does the body look like it is pulling down more than turning through?
- Or does the club seem to travel more around the body with rotation carrying the motion?
A player using the slam pattern often has a delivery that looks more abrupt and downward. A player using the sidearm throw pattern tends to look more as if the club is being swung around and through with continued rotation.
The visual difference is subtle, but once you know what to look for, it becomes much easier to identify. And when you can identify it, you can start matching your drills to your actual problem rather than guessing.
Why Nine-to-Three Swings Often Improve Your Release
This concept also helps explain why nine-to-three drills work so well for so many golfers.
In a nine-to-three swing, the club does not travel to a full backswing height. That matters because you have not created as much vertical loading. Without all that height and arm lift, it is easier to deliver the club with a more rotational, sidearm-throw feel.
That often leads to:
- Better sequencing
- More shaft lean
- A cleaner release pattern
- Improved contact
- Less urge to throw the club down from the top
If your nine-to-three motion looks solid, but your full swing falls apart, that is a strong clue. It often means that when the swing gets longer, you start defaulting back into a more vertical power source.
In other words, the added backswing length is not automatically the problem. The problem is what that added length encourages you to do in transition.
The Sidearm Throw Still Has to Be Matched with Path and Face
This is an important caution. The sidearm throw idea is powerful, but it is not a license to simply spin open and throw the club around your body without regard for the rest of the motion.
You still have to balance:
- Arm steepness vs. shallowing
- Club path
- Clubface control
For example, if your arms stay very steep in transition and then you try to apply a sidearm throw pattern, the club may still approach too far from the outside. That can create an outside-in path and steep leading-edge contact.
Likewise, if the clubface gets too open while the club is being delivered, then simply rotating harder can leave the face wide open through impact. So while the sidearm throw can improve your power source, it has to be paired with the right amount of shallowing and face organization.
This is why swing changes are rarely one-dimensional. Your power pattern influences path and face, but it does not replace them.
Why This Matters More with the Driver and Longer Clubs
With a mid-iron, you can often get away with either pattern for a while. A player using more of a vertical pull can still hit acceptable shots, and the dispersion may not look dramatically worse on every swing.
But the longer the club and the lower the loft, the more this issue tends to show up.
If you rely heavily on the slam pattern, you may notice:
- More inconsistency with the driver
- Steeper contact tendencies with fairway woods or long irons
- More toe strikes
- Less stable face control
- Good days and bad days that feel far apart
That is because longer clubs expose timing issues. A vertical, upper-body-dominant power source can work when your rhythm is on, but it tends to be less stable from day to day. The sidearm throw pattern usually gives you a more repeatable way to create speed because the body rotation organizes the strike more effectively.
So if your short irons are decent but your longer clubs are unpredictable, it is worth asking whether your overall power source is part of the problem.
How to Practice the Right Pattern
If you want to train a more rotational speed source, medicine ball work can help—as long as you choose the right motion.
A lighter medicine ball is usually best, because the goal is not brute strength. The goal is to teach your body to blend backswing loading into a rotational throw.
What you want to feel
You want to make a backswing, then give yourself enough time in transition so the force can be redirected out toward the target rather than straight down toward the ball.
That means:
- Not yanking from the top
- Not firing the arms immediately
- Letting the motion gather, then turn and deliver
- Feeling speed build and release later
A simple practice sequence
- Make a backswing rehearsal with your arms and torso.
- Pause just enough to avoid an immediate downward pull.
- Turn your body and feel the energy move around and out, like a sidearm throw.
- Notice whether your arms want to straighten too early.
- Repeat until the release feels later and more through the strike.
You can also alternate between a vertical slam rehearsal and a sidearm throw rehearsal. The contrast makes the difference easier to feel. Many golfers improve faster when they can clearly sense what they are trying to avoid versus what they are trying to create.
How to Apply This Understanding to Your Swing
The biggest takeaway is simple: speed is not just about effort, it is about direction of force. If you are applying power straight down, you may create speed, but you will often pay for it with a cast, scoop, steep path, or unreliable long-club contact. If you learn to direct force more like a sidearm throw, you give yourself a better chance to shallow the club, organize the release, and deliver speed through the ball.
In practice, start by checking your swing on video from face-on. Look at the delivery zone and decide whether your motion looks more like a slam or a throw. Then use nine-to-three swings and medicine ball sidearm drills to train a more rotational pattern. As you do, make sure your path and clubface stay matched so the better power source actually produces better shots.
When you understand which pattern you are using, you stop treating the symptoms and start addressing the engine of the downswing. That is when changes in contact, shaft lean, path, and club speed begin to connect.
