How High Heart Rate Monitoring and Alerts Work

Modified on Thu, 31 Jul at 6:01 AM

The SOL-X SmartWatch continuously monitors a user’s heart rate to detect signs of physical strain, fatigue, and possible heat-related stress. Alerts are triggered based on a specific pattern of elevated heart rate readings during active periods.

Alert Trigger Logic

An alert is triggered when:

Three consecutive high heart rate readings are detected at 5-minute intervals
For example: high HR at 5 min, 10 min, and 15 min will trigger the 1st ALERT
If high HR continues, a 2nd ALERT will be issued at the 35-minute mark

This proactive detection helps users take timely breaks, hydrate, and manage stress.

Basis for High HR Alerts

High heart rate thresholds are derived using ACGIH guidelines
Calculated using the formula: 180 - Age
These thresholds represent elevated heart rate in response to fatigue or heat stress

Example Timeline

Time Elapsed	Heart Rate Status	Alert Status
0:05 min	High HR Detected	—
0:10 min	High HR Detected	—
0:15 min	High HR Detected	1st ALERT
0:20 min	Normal HR	—
0:25 min	High HR Detected	—
0:30 min	High HR Detected	—
0:35 min	High HR Detected	2nd ALERT

Important Notes

This is not a medical device: While the feature helps flag elevated HR, it is meant for fatigue and heat stress awareness only.
Active HR spikes may occur at rest: This could be due to stress or health conditions. Alerts are designed to surface potential issues early.
Resting HR is a key fatigue indicator: Calculated daily based on the lowest recorded HR. An upward trend can indicate accumulated fatigue.
External influences such as coffee, smoking, or medication may affect heart rate readings. When in doubt, always consult the ship’s medical officer.