Stacked bars show nightly minutes in each sleep stage. The blue Quality line (right axis, 0–100) is a composite score weighted toward deep and REM sleep. Taller deep/REM segments and a high quality line indicate more restorative sleep. Use the slider below to pan across the full history.
Efficiency % (green) is actual sleep time ÷ total time in bed — the dashed target line is 85%. Fragmentation index (yellow bars) counts Awake transitions per sleep hour; a lower bar means fewer interruptions and more consolidated sleep.
Each dot is one night. The X-axis shows how far your previous-day stress was above (right) or below (left) your personal rolling baseline — so chronically stressed people are not penalised unfairly. Green dots cluster on the left (low-stress days), red dots on the right (high-stress days). A downward slope suggests stress is costing sleep quality.
The green line is your nightly sleep RMSSD (heart-rate variability in ms) — higher and stable is better. The dashed grey line is your rolling 14-day personal baseline. The blue Readiness score (right axis) is 50 when at baseline; red triangles mark nights where RMSSD dropped >15% below baseline, signalling that lighter training or extra rest is advisable.
Stacked bars show daily minutes in each activity tier (Sedentary → Vigorous). The red Active HR line (right axis) tracks average heart rate during active minutes. Toggle % View to see each tier as a share of total tracked minutes, making cross-day comparisons easier regardless of total wear time. More time in Moderate/Vigorous tiers with a gradually decreasing Active HR over weeks indicates improving aerobic fitness.
Cardiac Load = mean HR ÷ walking speed (bpm·s/m). A lower value means your heart works less hard at the same pace — a sign of improving aerobic efficiency over time. The orange rolling average smooths week-to-week variation to reveal the long-term trend. Scatter colours show the data source: Pedometer (GPS speed), Movement (accelerometer-calibrated), Exercise (session summaries).
The teal line shows average respiratory rate (breaths/min) recorded during sleep — normal adults range 12–20; values outside this range during sleep may warrant attention. Yellow bars indicate restless minutes (movement detected while nominally asleep). Diamond markers flag nights where HRV was significantly suppressed; clusters of high RR + restlessness + suppressed HRV often precede illness or recovery debt.
P5 (green dashed) represents your lowest-intensity hours of the day — a proxy for resting heart rate. P95 (orange dashed) captures your daily peak-exertion moments. The shaded blue band is the P5–P95 range; a narrower band on rest days and a wider band on active days is normal. The red Median line shows where half your daily readings fall. A gradual downward drift in P5/Median over months indicates improving cardiovascular fitness.
Each dot pairs the daily median heart rate with the nightly respiratory rate recorded during the following sleep session. A positive correlation (cluster rising left-to-right) is typical — higher daytime HR often reflects activity or stress that also elevates breathing rate during sleep. Outliers (very high RR at normal HR) may indicate respiratory illness or allergies independent of cardiovascular load. Colours differentiate calendar months so you can spot seasonal patterns.