This excerpt comes from a podcast featuring golf instructor Henrik Jentsch, who follows a science-based teaching approach.

He discusses common issues in the golf swing—namely fat or thin shots with irons. Jentsch explains that these mishits are often due to three key mechanics shared by top-level players.

These include the shaft angle at impact, the relationship between hip and chest movement (Sway Gap), and the correct rotational motion of the pelvis and chest. Golfers who analyze these aspects using tracking data can improve their ball striking. The goal is clean contact through optimized swing mechanics.

Henrik Jentsch’s teaching method for improving iron shots emphasizes several overarching principles based on scientific and data-driven swing analysis. His approach uses a deep understanding of biomechanics, kinematics, and physical principles to develop individualized swing solutions.

Key principles for optimizing iron shots include:

• Focus on measurable key indicators:

Jentsch’s method relies on analyzing specific data points using technology such as the "Shaft FO Angle Tracker" and indicators like "Pelvis Sway," "Sway Gap," "Chest Turn," and "Pelvis Turn" (available with a "3D Pro Subscription" @IMP Indicators). This highlights the importance of quantifiable metrics in evaluating and improving the swing.

• Prioritizing clubface alignment at impact (Shaft Lean):

A central principle is the importance of shaft angle at impact. Jentsch emphasizes that a forward-leaning shaft (negative angle) at impact is essential for clean strikes, in contrast to a backward-leaning shaft (positive angle). Reference values for tour players are -29° to -16° for men and -24° to -12° for women.

• Mastery of the pelvis-to-chest relationship (Sway Gap):

Another key principle is the concept of the "Sway Gap." Jentsch notes that elite players typically show positive forward pelvis movement at impact while the chest remains behind the pelvis (negative Sway Gap). This is a crucial factor for striking down on the ball while maintaining a neutral or positive club path.

• Sequencing of body rotation (kinematic sequence):

Jentsch stresses that in elite ball strikers, pelvic rotation leads chest rotation at impact. If the chest is ahead of the pelvis, it indicates a faulty kinematic sequence, potentially causing a steep downswing and negative face orientation. Correct rotational sequence is a cornerstone of his teaching method.

In summary:

Jentsch’s method for optimizing iron shots is built on data-driven analysis of specific biomechanical impact metrics, with a strong focus on shaft lean, the pelvis-to-chest motion relationship, and proper sequencing of body rotation.

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