4aiman
b26264538b
GPS background recording: - Batched writes (10s flush) in native service - Polling lock prevents parallel processing - Track by timestamp instead of line count - Recovery idempotent via max DB timestamp - Seq numbers on live recorded points GPX export: - Button in session detail - SAF file picker on Android (ACTION_CREATE_DOCUMENT) - GPS config in metadata (accuracy, minSpeed, minDist) Charts: - Pinch zoom enabled at creation (Hammer.js registers handlers) - touch-action: pan-y blocks pinch in normal view (page scrolls) - Fullscreen: CSS-only expand (no canvas manipulation) - Downsampled to 500 points for smooth rendering - Back gesture collapses fullscreen before closing modal Build: --real flag finds first non-emulator device
14 lines
548 B
JavaScript
14 lines
548 B
JavaScript
// Mifflin-St Jeor equation for Basal Metabolic Rate
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// Most accurate BMR formula validated by research (Mifflin et al., 1990)
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//
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// Males: BMR = 10 * weight(kg) + 6.25 * height(cm) - 5 * age(years) - 5
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// Females: BMR = 10 * weight(kg) + 6.25 * height(cm) - 5 * age(years) + 161
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export function calculateBmr(weightKg, heightCm, age, sex) {
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const base = 10 * weightKg + 6.25 * heightCm - 5 * age;
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return Math.round(sex === "m" ? base - 5 : base + 161);
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}
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export function getAge(birthYear) {
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return new Date().getFullYear() - birthYear;
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}
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