Differences in Mandolin Tremolo Motion between Beginners and Experts: Implications for Skill Acquisition

Abstract

Mandolin tremolo is a fundamental technique requiring rapid, high-frequency motion of the elbow and wrist. Understanding the kinematic strategies adopted across different skill levels is crucial for optimizing skill acquisition protocols and potentially mitigating performance-related injuries. This study investigates the differences in forearm and wrist motion between novice and skilled mandolin players to provide data-driven guidance. Ten participants, categorized based on self-reported experience levels (ranging from under 1 year to 6 years), were recruited. Miniature IMU sensors were attached to the hand and forearm. Participants performed tremolo on the open A string at their preferred pace. We analyzed the angular velocity data, computing the vertical velocity of the pick by modeling the hand-forearm kinematic chain. The primary finding was that the symmetry and consistency of the upstroke/downstroke pick velocity exhibited the strongest correlation with skill level. Beginners demonstrated significant velocity decay during the resistive upstroke phase. Intermediate players compensated for this by rigidly coupling the hand and forearm to leverage forearm inertia. Crucially, expert players demonstrated a distinct shift, actively incorporating radial-ulnar wrist deviation to maintain high pick speed and smooth momentum transfer. These findings provide kinematic benchmarks and suggest a progression from gross-motor compensation to fine-motor control optimization for effective skill training.

Keywords: Physical Ergonomics, Motor Skill Axquisition, Biomechanics, Musical Instrument, Motion Analysis, Training And Education

DOI: 10.54941/ahfe1007795