VDOT Field

VDOT Field puts Daniels' VDOT training method on your watch during a run. Based on the public Daniels-Gilbert (1979) formula, this data field shows everything a structured runner needs at a glance: • Target pace — computed from your personal VDOT level (20.0–90.0, 1 decimal) • Current pace — with adjustable smoothing (0–120 s) for steady readings • Heart-rate zone colouring — 5 zones (Z1–Z5) from your manual lactate threshold HR (80–220 bpm), colours follow the Garmin Connect convention (Z1 gray / Z2 blue / Z3 green / Z4 orange / Z5 dark red), independent of the Daniels centre badge • Training-zone badge — E / M / T / I / R letter in the centre, colour-coded by intensity • Cadence on the bottom row; the final cell shows activity time, wall clock, or an estimated finish time (ETA, experimental) • Race ETA (experimental) — projected finish time for 5K / 10K / half / full marathon / 50K / 100K, with four projection methods: uniform pace, target VDOT, live VDOT (default) and fatigue-adjusted. The target distance can be fixed or auto-upgrade as you pass each mark. Startup GPS distance jumps are detected automatically (integrated smoothed pace vs reported distance) so the estimate stays sensible from the first seconds • Metric or imperial units — switchable in English locale; Chinese locale always metric • English and Simplified Chinese interface FREE WEB COMPANION Plan your races and training paces in the browser — no watch needed: https://vdot.nnwlkj.net The web version uses the same formula, so race predictions and training paces match what you see on your wrist. SETUP 1. Add "VDOT Field" as a data field to a running activity 2. Open the field settings and enter your VDOT level and lactate threshold HR 3. Start your run — target pace updates in real time SETTINGS OVERVIEW • VDOT level: 200–900 (enter VDOT × 10, e.g. 455 for VDOT 45.5; default 450) • Lactate threshold HR: 80–220 bpm (default 175) • Background colour: white / black • Pace smoothing window: 0–120 s (default 10) • Motion threshold: 0–300 m/min (default 120 ≈ 7.2 km/h) • Top-left cell: heart rate / VDOT • Bottom-right cell: activity time / wall clock / estimated finish time (ETA, experimental) • ETA algorithm: uniform pace / target VDOT / live VDOT (default) / fatigue-adjusted • ETA target distance: auto-upgrade (default) or fixed 5K / 10K / half / full / 50K / 100K • Fatigue compensation strength (algorithm 3 only): aggressive / standard / conservative • Auto-upgrade target as each distance is passed: on / off COMPATIBLE DEVICES fenix 7 / 7S / 7X (incl. Pro and Pro Now WiFi), fenix 8 (43 / 47 mm, Pro 47 mm, Solar 47 / 51 mm), fenix 9 (43 / 47 mm, Pro 43 / 47 / 51 mm, Pro Solar 47 / 51 mm), fenix E, epix (Gen 2) and epix Pro (Gen 2, 47 / 51 mm), Forerunner 165 / 170 / 255 / 265 / 570 / 955 / 965 / 970. DISCLAIMER This data field is for training reference only. Calculations are based on the published Daniels-Gilbert formula and do not constitute medical advice or a training prescription. FEEDBACK WeChat: ileego | Email: [email protected]

• NEW (experimental): race finish-time estimate (ETA) in the bottom-right cell — select "Estimated finish (ETA)" for that cell • Six target distances: 5K, 10K, half marathon, full marathon, 50K, 100K — fixed target or automatic upgrade as you pass each distance • Four projection methods: uniform pace, target VDOT, live VDOT (default), and fatigue-adjusted (3–5 km baseline with a pure pace-decay fatigue factor and adjustable compensation strength) • Built on the Daniels formula with a 20-step bisection reverse lookup and a lazy row cache — steady-state frames perform no extra heavy math • Startup GPS distance-jump protection: the smoothed pace is integrated into an independent distance and compared with the reported distance, so GPS fix convergence cannot produce an absurd estimate; display VDOT also switched to a fixed 30-min reference window to remove long-run upward drift • ETA computes only while the bottom-right cell is set to ETA, leaving battery and performance untouched otherwise