Movement Sequencing
Also known as: segment sequencing, kinematic sequence
Movement sequencing is the timed order in which body segments accelerate and decelerate through a swing — correct sequencing multiplies speed; incorrect sequencing bleeds it.
Elite performers in every swing sport share a characteristic sequence: proximal (large, central) segments peak and decelerate first, transferring momentum distally (outward) to smaller, faster segments. In golf this means pelvis → thorax → lead arm → club. Disruptions — like a torso that peaks simultaneously with the pelvis rather than after it — indicate a sequencing fault. SwingVantage analyzes peak velocity timing from landmark tracking and flags segments that are out of order, labeling the finding with its confidence.
Example
Motion Lab shows the golfer's hip velocity peaking at frame 24 and thorax velocity peaking at frame 28 — a well-sequenced 4-frame gap. A fault would be both peaking at frame 24.
Related terms
- Kinematic ChainThe kinematic chain is the sequence of body segments — from ground to tip — through which force and speed are transferred in a swing, with each segment's energy amplifying the next.
- Landmark TrackingLandmark tracking follows the position of each detected body keypoint across consecutive video frames, creating a time-series trajectory for every joint that enables timing and velocity measurements.
- TempoTempo is the timing ratio between the backswing and downswing — the rhythmic pattern that separates efficient, repeatable mechanics from a rushed or overly slow transition.
- Ground Reaction ForceGround Reaction Force (GRF) is the force the ground exerts back against an athlete's feet — the foundational energy input for the kinematic chain in every swing sport.
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