THREAD: Biomechanics & How we breakdown the motion capture report at Driveline and communicate that info to the athlete w/drill recommendation.
Taken from my mini-talk presentation at ABCA.
1. We record motion capture data from the athlete and recreate the 3d model in #Visual3d
Taken from my mini-talk presentation at ABCA.
1. We record motion capture data from the athlete and recreate the 3d model in #Visual3d
2. We then apply physics to that model to obtain the kinematics and kinetics. These metrics are then organized into the report. Notes are then generated to help the athlete make sense of it all
Page 1: Cover page with athlete information
Page 2: Throwing Arm Kinematic Positions
Page 1: Cover page with athlete information
Page 2: Throwing Arm Kinematic Positions
Athlete Notes:
“Efficient upper body kinematic positions from foot plant through ball release. Creating a large amount of shoulder horizontal abduction (44 degs of scap load). Efficient shoulder abduction path from foot plant (90 degs) to ball release (90 degs).”
“Efficient upper body kinematic positions from foot plant through ball release. Creating a large amount of shoulder horizontal abduction (44 degs of scap load). Efficient shoulder abduction path from foot plant (90 degs) to ball release (90 degs).”
Page 3: Torso and Lower Body Kinematic Positions
- Early lateral trunk tilt
- Trunk opening early into foot plant
- Below average hip/shoulder separation
- hip/shoulder separation can be seen visually as the distance between the purple (pelvis angle) and red (trunk angle) line
- Early lateral trunk tilt
- Trunk opening early into foot plant
- Below average hip/shoulder separation
- hip/shoulder separation can be seen visually as the distance between the purple (pelvis angle) and red (trunk angle) line
Kinematic Sequencing Page:
Everything appears to be in order sequentially. However, it looks like the delay from peak pelvis to peak torso angular velocity has room to improve. We want there to be greater distance between the purple (peak pelvis) and red (peak trunk) arrow.
Everything appears to be in order sequentially. However, it looks like the delay from peak pelvis to peak torso angular velocity has room to improve. We want there to be greater distance between the purple (peak pelvis) and red (peak trunk) arrow.
Athlete Notes:
“Trunk lacks counter-rotation at foot plant combined with early lateral trunk tilt. Hip/shoulder separation (23 degs) and timing between peak pelvis and peak torso angular velocity (0.0229 secs) are below average with room to improve.”
“Trunk lacks counter-rotation at foot plant combined with early lateral trunk tilt. Hip/shoulder separation (23 degs) and timing between peak pelvis and peak torso angular velocity (0.0229 secs) are below average with room to improve.”
Page 4: Kinematic Velocities
- Lead Knee Extension velocity is well above average
- All other kinematic velocities appear to be within normal ranges
- Lead Knee Extension velocity is well above average
- All other kinematic velocities appear to be within normal ranges
Athlete Notes:
“Making up for poor hip/shoulder separation and sequencing with great lead leg block (610 deg/sec lead knee extension angular velocity) and linear momentum transfer. All other kinematic velocities within normal to above average ranges”
“Making up for poor hip/shoulder separation and sequencing with great lead leg block (610 deg/sec lead knee extension angular velocity) and linear momentum transfer. All other kinematic velocities within normal to above average ranges”
Key Notes for the Athlete:
"Hip/shoulder separation and sequencing have room to improve. Mainly a product of the trunk leaking a bit early, not holding counter-rotation into foot plant. Rotational transfer of momentum is below average."
"Hip/shoulder separation and sequencing have room to improve. Mainly a product of the trunk leaking a bit early, not holding counter-rotation into foot plant. Rotational transfer of momentum is below average."
Drill Suggestion and Focus:
"Roll-ins are going to be the best drill for you right now. You can emphasize holding trunk counter-rotation and getting into better positions at foot plant to efficiently transfer momentum rotationally."
"Roll-ins are going to be the best drill for you right now. You can emphasize holding trunk counter-rotation and getting into better positions at foot plant to efficiently transfer momentum rotationally."
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