P7—the moment of impact—is the defining instant of every golf swing. It determines strike quality, ball flight, and energy transfer. At this split-second, clubface angle, swing path, and body alignment converge, revealing how effectively motion, balance, and sequencing were built throughout the swing. Within the BioSwing Dynamics model, three core types—Upper, Middle, and Lower—display distinct biomechanical patterns that shape their P7 mechanics and impact signatures.

Upper Core Golfer – Steep, Vertical, Controlled by Lead Side

Upper Core players rely on upper-body dominance and vertical force. At impact, their lead side extends powerfully while the chest rotates through the strike. The hands are ahead of the ball, producing forward shaft lean and a steep, descending blow. The spine remains relatively upright, supporting a cover-style impact. Weight shifts firmly onto the lead leg, and vertical pressure from the lead foot stabilizes the motion. The result: a high-compression, steep strike with a downward angle of attack. Coaches emphasize maintaining lead-side control, upright posture, and timing the trail arm extension without over-releasing.

Middle Core Golfer – Balanced, On-Plane, Textbook Impact

Middle Core players achieve neutral positioning and the most “model” impact in golf. They blend vertical and rotational elements, producing a square, repeatable strike. The hands are only slightly ahead of the ball, creating moderate shaft lean with a shallow-to-neutral angle of attack. The pelvis leads the movement, transferring energy efficiently through the kinetic chain. The chest points slightly ahead of the ball, and both arms stay connected to the torso for a stable release. Coaches focus on maintaining spine angle, promoting consistent rotation, and ensuring efficient sequencing for reliable contact and trajectory control.

Lower Core Golfer – Rotational, Ground-Driven, Shallow Path

Lower Core golfers use the ground aggressively to generate power. Their impact is rotational and shallow, driven by strong hip clearance and deep spine tilt. The upper body stays behind the ball longer, while the chest remains closed through impact and opens just after. Hands are often even with or slightly behind the lead thigh, supporting a draw-biased strike. Weight pressure moves deeply into the lead leg as vertical ground reaction forces peak at or just after impact. Coaches refine hip timing, encourage shallow delivery, and use ground-up sequencing to enhance dynamic control.

Coaching Significance – Matching Mechanics to Core Type

Recognizing how core structure dictates P7 mechanics allows coaches to tailor instruction, reduce compensations, and optimize natural movement patterns.

• Upper Core Strategy: Train vertical delivery, forward shaft lean, and lead-leg stability for high compression.

• Middle Core Strategy: Blend rotation and vertical motion for a square, neutral strike with consistent energy flow.

• Lower Core Strategy: Harness rotational speed and ground force, maintaining spine tilt and timing the trail-arm release for powerful, shallow impact.

Summary

P7 is the truth moment of the golf swing—the collision point where preparation becomes performance. Each core type achieves it differently: Upper Core through vertical control and compression, Middle Core through balance and precision, and Lower Core through ground-driven rotation. Understanding these impact dynamics enables coaches to align instruction with natural biomechanics—unlocking each player’s most efficient, repeatable, and powerful strike.

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