Use Cases
Major workflows and analysis patterns
Shot-Level Match Analysis (Babolat)
Compare first vs last quarter performance to detect fatigue patterns. Shows PIQ decline, speed drop, and consistency degradation over match duration.
"detect fatigue in my latest match"Measure shot consistency by type (forehand, backhand, serve) with standard deviation and coefficient of variation for PIQ and speed.
"analyze consistency for match 657"Analyze rally length distribution, average shots per rally, and shot type patterns within rallies.
"show rally patterns for my last match"Generate Babolat-app-style narrative insights with actionable recommendations based on match data.
"generate coaching insights"Linked Session Analysis (Apple Watch + Zepp)
Automatically find Apple Watch + Zepp session pairs by matching timestamps within 5-minute tolerance.
"detect linked sessions"Correlate Apple Watch wrist motion (100Hz) with Zepp racquet metrics (333Hz) for each swing.
"analyze linked session 2024-12-15"Compare swing detection accuracy between Apple Watch rotation threshold and Zepp swing events.
"compare AW vs Zepp accuracy"Visualize 3D swing paths comparing wrist (Apple Watch) and racquet (Zepp) motion.
"show 3D trajectory for swing 5"ML Stroke Classification
Train Random Forest, LDA, KNN, or SVM to classify FH/BH/Serve from Zepp sensor data.
"train stroke classifier with random forest"Explain predictions with SHAP values showing which sensor features contribute to classification.
"explain swing prediction for swing 0"Proper time-aware CV that prevents future data leakage with purge gap between train/val.
"train with temporal cross validation"Identify low-confidence swings near decision boundaries for manual review.
"flag ambiguous swings for review"Heart Rate Analysis (Garmin)
Compare heart rate statistics in wins vs losses across match history.
"compare heart rate wins vs losses"5-zone HR chart with time in each zone during matches or practice.
"visualize HR for latest match"Analyze how shot quality (power, spin, speed) degrades in higher HR zones.
"show shot quality by HR zone"Detect HRM sensor degradation over time using Mann-Kendall trend test.
"analyze HR drift over time"Practice Planning & DOE
Define structured drill sequence: '10 FH cross, 10 BH dtl, 5 Serve flat'.
"create plan: 10 FH cross, 10 BH slice"Match recorded swings to plan sequence with completion percentage.
"track practice progress for today"3-factor Design of Experiments: Type x Placement x Effort (27 combinations).
"create serve DOE with 5 reps per combo"Main effects, interactions, and optimal combination for speed/spin.
"analyze DOE results for speed"Vision & Video Analysis
Analyze player form using MediaPipe, OpenPose, or MoveNet keypoint detection.
"analyze pose for stroke video"Track ball trajectory using YOLOv8 or Faster R-CNN object detection.
"detect ball in match video"Extract PNG frames at swing contact points using ffmpeg.
"extract frames at -400ms, 0ms, 200ms"PDF/HTML report with video frames, sensor data, and metrics overlay.
"generate stroke report for swing 3"Multi-Sensor Comparison
Compare new Zepp Universal vs legacy Zepp2 metrics over time.
"compare Zepp vs Zepp2 speed trends"Compare serve, forehand, backhand PIQ and speed between practice and matches.
"compare practice vs match performance"Merge Zepp, Babolat, and Garmin data into synchronized timeline.
"build unified session for 2024-12-15"Combine Zepp and Babolat classifications with weighted voting.
"get consensus classification for session"