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Is Hitting For Power: Hips Before Hands, Hip Rotation, Legs, Or Lower Body Mechanics?

Is Hitting For Power: Hips Before Hands, Hip Rotation, Legs, Or Lower Body Mechanics For Youth Baseball & Softball Swing? | Drills To Do At Home

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Learn whether hitting for power is either or neither of: hips before hands, hip rotation, all in the legs, or lower body mechanics.  You’ll discover useful youth baseball and softball swing drills to do at home.

Zepp Swing Experiment Attempting To Put Value On Role Of Pelvis In Swing

 

 

Question: How Much Does Pelvis Add to Bat Speed at Impact?

According to InnerBody.com, the pelvis is a sturdy ring of bones that protects the delicate organs of the abdomino-pelvic cavity while anchoring the powerful muscles of the hip, thigh, and abdomen. Several bones unite to form the pelvis, including the sacrum, coccyx (tail bone), and the left and right coxal (hip) bones. Photo courtesy: OrthoInfo.aaos.org

Using the Zepp (Labs) Baseball app, I wanted to employ the Scientific Method to analyze how much turning the pelvis (some refer to this as the hips) adds to Bat Speed at Impact.  The ‘Front Facing Swings’ are an attempt to isolate out the role of the pelvis in the swing, so we can analyze how much the pelvis adds to swing performance.

Just a heads up, the “pelvis” and “hips” are not the same thing.  The hips are a small part of the pelvis.  However, most coaches refer to “hips” when instructing the swing, when most likely they mean “pelvis”.

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Background Research

For those coaches with a Growth Mindset that want to find out more about the science of locomotion.  I’d recommend reading the following technical books:

If working through the weeds isn’t for you, then you can click the following HPL posts that synthesize the information contained in the previously mentioned books:

I’ve done two swing experiments revealing the role of the shoulders in the swing that tested the value of ‘Showing Numbers’ versus ‘NOT’.  These showed an average increase to Bat Speed at Impact – Showing Numbers – of between 5 to 6-mph.  In addition, one of the experiments showed an average increase to Ball Exit Speed of over 9-mph ‘Showing Numbers’! That’s between 38 to 48-feet of ADDED batted ball distance by ‘Showing Numbers’:

This Zepp swing experiment is attempting to put value on the role of the pelvis in the swing.

 

Hypothesis

Ted Williams, in his book The Science Of Hitting, said the ‘hips lead the way’.  This observation is irrefutable when watching slow motion video of elite hitters.  A majority of coaches teach primarily a ‘hips only’ strategy, which I disagree with.  I feel ‘firing the hips’ is over-taught and over-valued, while the role of the shoulders is under-taught and under valued.  The objective of this experiment is to see what benefit the pelvis (or hips) add to swing performance.

I predict ‘Regular Swings’ will have a substantial increase in Bat Speed at Impact than the ‘Front Facing Swings’.

 

Performance Benefit of Pelvis Swing Experiment

Equipment Used:

  • Zepp Baseball app (to measure Bat Speed, Hand Speed, Time to Impact, & Attack Angle),
  • Backspin batting tee,
  • Two yellow dimple baseballs (feedback markers),
  • Flip camera to record swings, and
  • 33 inch bamboo bat.

Setup:

  • Yellow dimple ball feedback markers to keep starting footwork the same = bat length…I used two yellow dimple ball markers to make my stance setup consistent.  One was placed inside my back foot, close to the plate.  The other was placed one bat’s length ahead of the back marker.
  • Tee was set one baseball’s length behind the front feedback marker, and tee height was about mid-thigh
  • We stayed as consistent as we could with keeping the ball height and depth the same for most swings.
  • The two tests in the swing experiment were counter-balanced.  Which consisted of eight blocks of 25-swings done in the following order ABBA BAAB.  ‘Front Facing Swing’ was letter ‘A’, and ‘Regular Swing’ was letter ‘B’.  200 total swings were completed in the experiment, 100 per test.  Counter-balancing helps remove the “getting tired” and “warm up” factors.
  • The objective of ‘Front Facing Swings’ was to start the ‘belt buckle’ pointing at the pitcher, and to minimize pelvic movement.
  • Experiment Day-1 on 6/19 we completed 75 total swings (25 ‘Front Facing’ & 50 ‘Regular’).  Experiment Day-2 on 6/26 we completed 125 swings (75 ‘Front Facing’ & 50 ‘Regular’).
  • We had to break the 200 total swings into two days, with the second day coming 1 week later, because of time constraints.

Data Collected (Zepp Baseball App):

‘Front Facing Swings’ Days 1 & 2 side by side…

Front Facing Swing Averages

‘Front Facing Swing’ AVERAGES for the following metrics: 77-mph Bat Speed at Impact, 30-mph Hand Speed Max, 0.177-secs Time To Impact, -24.5* Bat Vertical Angle at Impact, & 3* Attack Angle.

‘Regular Swings’ Days 1 & 2 side by side…

‘Regular Swing’ AVERAGES for the following metrics: 81.5-mph Bat Speed at Impact, 33-mph Hand Speed Max, 0.130-secs Time To Impact, -28.5* Bat Vertical Angle at Impact, & 0* Attack Angle.

 

Data Analysis & Conclusion

Zepp data analysis comparing the averages of averages:

  • 4.5-mph INCREASE to Bat Speed at Impact in ‘Regular Swings’,
  • 3-mph INCREASE to Hand Speed Max in ‘Regular Swings’,
  • 0.047 DECREASE to Time To Impact in ‘Regular Swings’,
  • -4-degree DECREASE to Bat Vertical Angle at Impact in ‘Regular Swings’, and
  • -3-degree DECREASE to Attack Angle in ‘Regular Swings’.

 

Notes

  • The increase in Bat Speed at Impact and Hand Speed Max confirmed my hypothesis, and didn’t surprise me since the first piece of The Spinal Engine to interact with Gravitational Forces is the pelvis.
  • It’s also interesting to note, that you can see from the side-by-side video of the swing, that I wasn’t able to keep the “belt buckle” ‘front facing’ as much as I would have liked to on ‘Front Facing Swings’, so possibly the pelvis could have added a bit more.  I was feeling inside right knee tightness when forcing pelvis to stay facing forward.
  • The DECREASE in Time To Impact with ‘Regular Swings’ could have been due to the increased step and/or unfamiliarity with the movement, while doing ‘Front Facing Swings’.
  • In past swing experiments testing ‘Down Shoulders’ and ‘Showing Numbers’ I increased my Attack Angle – in the positive.  I think the 3-degree increase in positive Attack Angle for ‘Front Facing Swings’ was due to better execution of those elements.
  • We were testing Ball Exit Speed in the beginning but had equipment malfunction (batteries went dead).  I was too many swings in when the equipment was fixed, so we threw BES out in this experiment.  I’d love to see BES measured in a future review of this swing experiment.
  • One last thought, because my pelvis inwardly turned toward the catcher – drastically – on ‘Front Facing Swings’, we saw quite a drop-off in production.  Does this give evidence that an inward turn before the swing may be inferior to keeping the pelvis in neutral (or belt bucket facing plate)?
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Hitting Training For Baseball & Softball Swing Trainers | Hitting Performance Lab

Baseball Softball Hitting Power Come From Loading Hip Rotation Before Hands? | Swing Harder, Hit Ball Better, & Farther Drills

Does baseball and softball hitting power come from loading the hips and rotating them before the hands?  Discover how to properly AND safely swing the bat harder, hit the ball better, and farther hitting drills.

How “Loading & Exploding The Hips” Can Be VERY Dangerous To The Lower Back…

 

 

We’ll get to the above video, but first let me be clear…

I’m not saying the pelvis doesn’t play a role in the swing, because it does.  However, I feel this spot reserved in the swing’s sequence of movements is hyper-focused on by a majority of hitting gurus.  More and more research is saying extreme “hip thrust” or “loading and exploding the hips” can be VERY damaging to the lower back over time.  You’ll see why in a moment, but for now please note that in this podcast episode, former USA Men’s Gymnastics Coach Sommers says the lower back portion of the spine isn’t made for a high degrees of rotation, but the T-Spine is.

Another thing I want to clear up, we don’t teach a 100% pure rotational mechanics here.  We teach a blend of linear-rotational.  Please CLICK HERE to read our thoughts on this.

In this post, we’ll cover:

  • How the spine stacks up (quick anatomy lesson),
  • Does consistent power come from the ground? And,
  • Teaching hitters a safer more effective swing.

Let’s get started…

SCIENCE-BASED TRAINING:

Improve your hitting strategy dramatically by applying human movement principles.

Learn not only how and what to train but also the science behind the methods.

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How the Spine Stacks Up

Photo courtesy: MayfieldClinic.com

Here’s a quick anatomy lesson of the spine:

  • Cervical – the vertebrae in your neck, consists of 7 vertebrae, are allowed to flex, extend, and rotate,
  • Thoracic – the vertebrae in the middle of spine including shoulders, consists of 12 vertebrae, which are also allowed to flex, extend, and rotate, and
  • Lumbar – the vertebrae in lower back, consist of 5 vertebrae, and are allowed to flex and extend ONLY.
  • Sacral & Coccyx – there are 5 fused vertebrae here, and the Coccyx is sometimes referred to as the “tail” bone.

Did you catch that about the Lumbar?  It’s important, so it bares repeating…the vertebrae in the lower back IS NOT built to rotate!  Right now, you may be thinking: “Wait a minute, how’s that?!  I’ve seen millions of swings, and the hitter’s pelvis (and lower back) are rotating!!”

According to Charlie Weingroff, DPT, CSCS, a physical therapist, a trainer in New York City, and is pretty high up on the human performance food chain, says this:

“Only your thoracic spine (which consists of the 12 vertebrae in your upper and middle back) is designed to rotate significantly — about 40 degrees in each direction, according to Weingroff — when under compression. The lumbar spine (lower back) should rotate no more than about 12 degrees.”

Some movement experts (like Thomas Myers, author of the book Anatomy Trains), says the lower back can rotate no more than 7-degrees.  So according to the experts, 7 to 12-degrees is a good rotational range for the Lumbar section of the spine. That’s NOTHING compared to the 40-degrees of rotation – in each direction – of the middle and upper back section of the spine (which includes shoulders).

So what’s happening then?  You see, since the lower back vertebrae are not designed to rotate, it’s the surrounding muscles that are rotating a fixed object (non-rotating Lumbar), and is why you do see rotation.   The T-Spine vertebrae are built to rotate (again, this includes the shoulders), hence is why hitting coaches should put their rotational focus there and NOT the hips, pelvis, or low back.

Is rotating back hip through the zone necessary for power? Not in the way most coaches think.  Consider this quote from Physicist, Electrical Engineer, and author of the book The Spinal Engine, Dr. Serge Gracovetsky:

“The axial rotation of the spine cannot happen unless the spine is flexed by the right amount on the correct side. Coaching an athlete to throw without a proper spinal position is an invitation to severe torsional injuries.”

Dr. Gracovetsky is referring to this “flex” as a side bend with the shoulders.  The point is, USE THE SHOULDERS to accomplish rotational power.  Warning for coaches: if you shrug this information off because of ego or pride, and continue to teach pelvis, hip, or lower back dominant twisting swings, then you’re wearing holes in the low backs of your hitters.  Be careful because the link is there, and one can be held liable.

Don’t worry, I’ll show those coaches doing this unknowingly a safer way, at the end of this post…

Does Consistent Power Come from the Ground?

Water Polo Throw

Water Polo throw photo courtesy: YouTube Egy image from video

You may be thinking, but consistent power comes from the ground…the pelvis is the first to interact with Gravitational Forces, and that’s why you teach “hip thrust”. I agree with Ted Williams that the ‘Hips Lead the Way’, but they don’t contribute as much to consistent power as most think.  I know this may sound earth shattering for some, so please stay with me here.

CLICK the following link to a post I did titled, “The Swing DOES NOT Start From The Ground & Move Up?”

This brings me to the water polo throw video above…

Let me ask you a question, what do you think the “fastest throw in Water Polo” is?  Doing a Google search using those keywords brings up the following statement:

“The overhand shot from a Croatian senior men’s national team player is recognized as the fastest shot in the world at 60 MPH (96.5 KPH). The overhand shot is the standard throwing motion in water polo. It is the same arm motion as a pitcher uses in baseball.”

So, let’s think about this.  In water, there are little to no Gravitational Forces, and the best human floating in water, can throw a volleyball-sized ball 60-mph?  What do you think the speed would be if this person was floating in water and threw a baseball-sized ball instead?  75-mph?  80-mph? 90-mph?  Okay, so let’s say this top-of-the-food-chain water polo player throws a baseball floating in water 80-mph.  You’re telling me a top-of-the-food-chain pitcher in the Big Leagues, throwing down a mound, can only throw 20-mph more (assuming 100-mph) than someone throwing the same ball floating in water?!

I dunno, but this begs the question, does the pelvis (and lower Lumbar), OR the shoulders (and T-Spine) contribute the most to pitching velocity AND Ball Exit Speeds?

If you need to see more examples about this, then CLICK HERE for a swing experiment titled, “How Much Ball Exit Speed Does Pelvis Contribute To A High Level Swing?” 

Consider this Tweet from one of my readers…

And I added the following comment…

So what role do I think the pelvis and low back play in the swing, if not power?  Directional force.  Allows the hitter’s swing to convert Centripetal into Centrifugal Force.  In a nutshell, the hitter’s “belt buckle” must point in the direction of the batted ball.

So what’s the answer?

 

Teaching Hitters a Safer more Effective Swing

Here are some resources to get you started, outside of the ones already mentioned:

Coaches, PLEASE get educated.  Don’t let ego or pride get in the way of helping hitters swing safe.  Like Tony Robbins says,

“If you aren’t growing, then you’re dying.”

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