Overall Efficiency Grade: 59.5

Mobility, Flexibility & Stability Screening

Charlie is in the “tight mover” category. His thoracic mobility was neutral at 55 degrees of rotation to the right and left. He has pelvic control in his pelvic tilt isolation which will allow energy transfer into the upper body. There was vibration in the lower back during that test, which shows the lower abdomen is more developed than the lower back. He was limited in the pelvic rotation test, which indicates that he will have limited ability to disassociate his upper and lower body efficiently. Torso disassociation was good. This will give him the ability to create energy transfer through torque.

Charlie failed the overhead squat test with limited ankle mobility. He has core instability which will affect ultimate energy transfer speed up the chain.

He has an under-developed scapular region, which will help reduce torque through his upper body anchor. His scapular retraction was in the “neutral” category. Shoulder flexion was good, as was external rotation. Internal shoulder rotation was tight on the left arm.

Hip rotational mobility was “stiff.” He was able to turn 25 degrees in the right and left hip internally. Externally, he was 25 degrees on the right and the left.

His lower body showed limited left and right leg stability, and his glutes stabilized very well during the glute bridge test. Stability will need to be improved for good body control in his load and forward advance.

All wrist and cervical screens were a pass.

Force Plate Swings

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

Charlie loads into his whole back foot. Back leg loading numbers are good at 100% of his body weight and he holds that well into his forward advance.

Front leg force was good but the rate of force production was average. He has 200% of BW in his front leg. 200% is the number we are trying to hit. He’ll need a more violent interaction with the ground with his front heel, once it plants. His preferred method of creating speed is vertical torque force. He has 35 Newtons of torque in his back leg, which is lower than the 45 Nm we are looking for. He externall rotates his back shoe out, which will lower the back leg torque reading. He strides slightly across his body and creates 80 Nm of front leg torque, which is high. His front leg resisting force on the x axis is 75% BW, which good. However, the x-axis timing number is 50% which shows he’s accepting weight into his front leg prior to making the turn. This will make him lose energy and reduce adjustability. We want him to stay anchored to the ground with the back heel until the turn transfers that weight into his front side.

KVEST Sequencing & Rotational Speeds

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

Turn speeds are low on our “Real Speed,” scale and can be improved with better deceleration patterns. This will be a focus of our strength and prep plane.  Hip turn speed of 400 deg/sec is low on our “Real Speed” scale and can be improved with better torque in the back leg. He gets good build in hip to core and core to lead arm transfer. Torso speeds of 800 deg/sec is Average on the Real Speed scale. Lead arm values get good build at 1140 deg/sec and wrist speeds are below average at 1400 deg/sec. Kinematic sequences were correct and energy transfer is good. The lack of overall speed is more of a function of poor deceleration patterns and functional strength.

Bat Sensor Data

Bat speeds were average for age at 61-63mph on a Blast sensor. Attack angles to the ball were good at 4-9 degrees. Rotational acceleration is very low at 3 G’s and a byproduct of some length in the swing. Time to impact was below average at 190-200 milliseconds which indicates a tight turn.   Bat plane is excellent.

Summary & Recommendations

• Get back shoe straight ahead for better torque.
• Increase rotational speeds and decel patterns in the turn – this will mostly be done in the weight room.
• Improve the anchor to the back shoe into the ground prior to the turn. This will improve adjustability.
• Improve scapular region strength for better torque in the swing.
• Improve ankle mobility

Video for ankle mobility