Mobility, Flexibility & Stability Screening

Macy is categorized as a “loose” mover.  She sets up in a “C” posture.  In her pelvic tilt test she was able to create anterior and posterior tilt, but showed vibration in the test.  This is a result of weakness or lack of control of the lower abdominals.  She did pass the pelvic disassociation test, which indicates she will have the ability to unload correctly in her sequence.  Macy also passed the torso disassociation test which indicates she has the ability to load correctly against a stabile lower half.  She passed the squat test with her hands behind her neck, which indicates there is some limitation in her thoracic spine.  She had a limited toe touch, both bilaterally and unilaterally.  This is an indication of tight hamstrings or a thoracic limitation.

Macy is a “loose” mover in her thoracic rotation, showing 70 degrees of rotation to the right and 65 degrees of rotation to the left.  She also showed “loose” movement qualities in her lower quarter rotation test.  She had 60 degrees of internal rotation in her left hip and 70 degrees of external rotation in her left hip.  Her right hip had 45 degrees of internal rotation and 70 degrees of external rotation.  She created 5 inches of scapular retraction which puts her in a neutral/loose category as well.  The larger ranges of motion will indicate a larger loading method will be needed to take out the slack between segments.  In her scapular palpation screen it was found that we could get 4 fingers under her scap.  This is a sign of weakness and possibly of a winged scap.  This will also contribute to a necessity of a bigger loading mechanism.

Macy has good ranges of internal and external rotation of the shoulder.  She was able to hold for the duration of 8 seconds in the reach, roll, lift test which indicates scapular strength in the elevated position.  In her lat length screen she was only able to create enough shoulder flexion to get her arms elevated in front of her nose.  We would like to see the arms being able to make it past the nose.  She passed all the wrist flexion, deviation, and supination/pronation screens.

Macy held her balance for 11 seconds in the single leg (eyes closed) balance screen. This is a good indication she will be able to maintain rear leg stability as she loads and advances forward on her rear leg.  She was limited on the left leg only maintaining balance for 4 seconds.  She passed the glute bridge while maintaing a stable core.  Her side bend screen showed the capability of 40 degrees bend in both directions.

Force Plate Swings

Below is video of the swing analysis. I will walk you through this matched up with video.

Macy has the start of good metrics that we should be able to clean up and improve.  The focus will be using her front leg to create more speed.  She loads into her whole foot and creates good back leg force.  She creates over 100% of BW in the back leg but loses it quickly in her  forward advance.  Back leg torque numbers are low at 10 Nm.  45 Nm is what we are shooting for.   Her front leg post is below  average and the rate of force development is slower.  Front leg vertical force is under the 200% BW we are looking for, at 140%.  Her horizontal force is good at 60% BW with a good rate of force development – 70% is considered good.   Her X-axis timing number (one of the most important we get from the force plate) is at 50%.  80% is what I consider proficient.  This means she’s leaking into her front leg prior to making the turn, vs. holding anchor with her back shoe into the ground and turning into her landing.  This will limit adjustability.  Her lower body metrics will clean up with the feeling of keeping pressure in her back shoe during the advance and getting a more forceful interaction with her front shoe into the ground.

KVEST Sequencing & Rotational Speeds

The 3d readings are on kinematic sequencing and rotational speeds.

Macy is close to having the preferred swing sequence.  I would like to see her hold her scap load longer for better energy transfer from her pelvis to her stretched core.  Her mechanics aren’t bad, but she has more energy transfer available.   Her pelvis speed is in the “good” category on our real speed graph at 680 deg./sec.  Torso speeds are in the “needs improvement” category on our real speed graph at 775 deg./sec.  This is due to the lack of stretch through a scap load.  The arms get good gain at 1075 deg./sec and overall hand speed is good at 1900 deg./sec.  The mechanics are pretty sound.

Bat Sensor Data

Bat speeds are  average at 53 mph.  She turns under the ball well with good side bend so vertical bat angle is good. Rotational acceleration is good at 18 G’s.  Time to impact is good at 160 ms.  Good overall metrics

Summary & Recommendations

• Maintain back leg connection to the ground in advance and into the turn.
• Get more forceful heel interaction with the ground
• Hold scap load longer for better pelvis to core energy transfer.