The report, prepared by The Baseball Performance Lab (BPL) and The Golf Lab, presents a motion‑capture analysis of hitter Dom Canzone using AMM 3D technology (240 Hz, rank‑7+ swings). It consists of two parts: (1) BPI testing, which compares four bats identified by Balance Point Index (BPI 67, 73, 76, 80) using uncued swings to isolate bat effects; (2) movement testing, which evaluates six setup‑cue conditions (Baseline, Tall, Tall + Hands Back, Taller + Hands Back, Taller + Hands Too Far Back, Wrist Extension) primarily on the BPI 73 bat, with Wrist Extension using the BPI 80 bat. For each group, swings (1‑3 per condition) are blended into a synthetic kinematic sequence aligned at contact, and three impact metrics are extracted: bat speed at the sweet spot, vertical bat angle, and angle of attack. The report notes estimated bat lengths (33.1‑33.5 in) derived from a fuzzy match to BPL’s Bat Matrix. Key findings include: BPI 67 produced the highest uncued bat speed (73.6 mph) despite a single swing; Tall + Hands Back yielded the fastest cue‑adjusted speed (79.3 mph) versus Baseline (69.1 mph); taller stances flattened vertical bat angle; Wrist Extension generated the steepest bat angle (‑39.4°) and lowest speed (67.5 mph). All sample sizes are small, so results are directional and intended to guide further data collection. The report concludes with six concise takeaways summarizing bat length estimation, performance rankings, cue effects, and the need for larger samples.
Topics
Methodology: AMM 3D Motion Capture and Synthetic Kinematic Sequencing
Details the use of 240 Hz AMM 3D motion capture, rank‑7+ swing selection, alignment at contact, and blending of 1‑3 swings into a synthetic kinematic sequence for each condition.
BPI Testing: Comparative Performance of Four Balance Point Index Bats
Presents uncued swing results for BPI 67, 73, 76, 80, including estimated bat lengths, peak rotational timing, and the three impact metrics (bat speed, vertical bat angle, angle of attack).
Movement Testing: Impact of Six Setup‑Cue Conditions on Swing Metrics
Analyzes how Baseline, Tall, Tall + Hands Back, Taller + Hands Back, Taller + Hands Too Far Back, and Wrist Extension cues affect bat speed, vertical bat angle, and angle of attack, primarily using the BPI 73 bat.
Key Findings: Speed, Angle, and Cue Effects Across Bats and Setups
Summarizes the standout results: fastest bat (BPI 67), fastest cue (Tall + Hands Back), flattening of vertical bat angle with taller stances, and steepest angle with Wrist Extension.