Mobility Screen

Jacob is categorized as a “neutral” mover.  He sets up in a neutral spine position in his athletic stance.  In his pelvic disassociation screen he was able to create anterior and posterior tilt.  There was a limited amount of range of motion as noted.  He passed his pelvic disassociation screen.  He was limited in his torso disassociation screen but showed improvement with assistance (we held his hips).  This tells us there is some lower body instability or weakness.  He was limited in his overhead squat screen and was also limited in his hands behind the neck squat screen.  In his subsequent ankle dorsiflexion screen he also showed limitation in both ankles.  The right ankle came up 3 inches short of normal ROM and the left came up 1 inch short.  Jacob passed his toe touch screen.

Jacob created 65 degrees of thoracic rotation to the right and 65 degrees of thoracic rotation to the left.  He created 35 degrees of thoracic side bend to the right and 35 degrees of thoracic side bend to the left.  Jacob was able to pull his elbows rearward 4 inches in his scapular retraction screen. He created 45 degrees of right internal hip rotation and 30 degrees of right external hip rotation.  He created 50 degrees of left internal hip rotation and 45 degrees of left external hip rotation. 

Jacob has adequate range of motion internally and externally in his right and left shoulders.  He passed the scapular palpation screen as were unable to get 4 fingers under his scapulas.  He passed his lat length/shoulder flexion screen by raising his arms overhead to touch the wall.  Jacob also passed his reach, roll, and lift screen showing good scapular strength while in the upward rotated position.  He also passed all impingement, wrist deviation, wrist flexion/extension, forearm supination/pronation, and cervical screens. 

Jacob was able to balance on his right leg for 13 seconds in his single leg balance screen (eyes closed).  He was able to balance for 15 seconds on his left.  He passed his single leg glute bridge screen on both legs respectively, but noted he felt muscle activation in his quads.

Force Plate Swings

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

Jacob creates a whole foot load in his rear foot, we would still like to see a better heel load here.  He creates 56 N of torque in his rear leg, which shows good counter rotation against a stabile leg.  He creates 101% body weight (859 N) of vertical force in his rear leg.  He does a good job carrying that force in his advance.  He creates a low amount of vertical force in his lead leg at 125% body weight (1064 N).  The rate of force development is average.  He creates 43% body weight horizontally in the lead leg.  This again is an overall low number and shows an average rate of force production.  His x-axis timing is near 100% efficient meaning he’s holding his rear leg load into his front foot and beginning of the turn.

KVEST Sequencing & Rotational Speeds

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

Jacob presents as an in sequence swing (pelvis, torso, upper arm, wrist).  He portray’s a good pattern of movement and pretty good gains up his sequence.  He does have some room for more growth by taking the slack out of his torso prior to launch.  His k-vest data shows his torso inwardly rotating to -37.07 degrees into heel strike and it continues to inwardly rotate as he launched, reaching -41.99 degrees.  This shows his torso is still trying to create stretch in his unload.  His pelvic speed was 642 deg/sec., which is good for his hip size.  There is a slow rate of acceleration and deceleration.  His ability to accelerate and decelerate faster will allow for him to make swing decisions later and move energy more rapidly up his sequence.  His torso speed is 999 deg/sec., and showed good acceleration and deceleration patterns.  His upper arm speed was 1301 deg/sec.  Wrist speeds were 2044 deg/sec. 

Bat Sensor Data

Jacob’s bat speeds were 61-64 mph.  This is low per his movement abilities.  His time to impact was good at 140-160 milliseconds.  His rotational acceleration is high at 20-27 G’s, which means the turn is tight.  His attack angles are 2-11 degrees which are in the lower spectrum for pitch flight.  His vertical bat angles are -16 to -33 degrees.  These are in a reasonable range but on the low side.  We would like to see -20 to -30 at the top of the zone and -30 to -40 at the bottom of the zone.

Summary & Recommendations

• Lower body stability work.

• Overall force production in the weight room (both bilaterally and unilaterally).

• Creating a better scapular load/resistance in the advance to help take the slack out of the torso.