Collapsing the Backside
The rear hip, knee, or shoulder loses posture and drops underneath the swing, often producing an excessively uphill path and inconsistent contact.
Definition
Dropping or collapsing the backside occurs when the rear hip, knee, or shoulder loses posture and sinks underneath the swing. Rear-side tilt is part of an efficient swing; collapse is uncontrolled loss of height, space, and direction.
What It Looks Like
- Back knee drops sharply toward the ground
- Rear shoulder works under too early
- Barrel becomes excessively uphill
- Frequent pop-ups or swings under elevated pitches
- Head height changes dramatically
Likely Causes
- Weak or poorly organized rear-hip load
- Trying to lift the baseball
- Early barrel dump
- Lack of front-side resistance
- Confusing side bend with collapse
Fix Strategy
Teach the hitter to rotate around a stable posture while maintaining space between the torso and pelvis. Use posture constraints, high-pitch tasks, and ball-flight targets that punish excessive lift.
Coach Steve Cues
- Rotate around your posture
- Keep height as you turn
- Match the pitch, do not lift it
- Rear hip turns forward, not downward
Success Markers
- Controlled head height
- Cleaner contact on pitches up in the zone
- Line-drive flight instead of forced elevation
- Rear side rotates through without disappearing underneath
Blast Motion Indicators
Monitor Attack Angle, Vertical Bat Angle, On-Plane Efficiency, Connection at Impact, and swing-to-swing variance.
Master drills
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