How a Fitness Tracker Converts Wrist Motion
A wrist-worn fitness tracker counts steps by detecting arm acceleration patterns through a MEMS accelerometer and fil...
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How a Fitness Tracker Detects Sleep Stages
A wrist-worn fitness tracker infers sleep stage transitions from heart rate variability, movement data, and skin temp...
Read itChest Strap vs. Wrist Sensor: How Each Works
Chest straps measure electrical heart signals directly; wrist sensors read blood-flow changes through skin.
Read itHow a Fitness Tracker Estimates Calories Burned
Fitness trackers estimate calorie burn by combining accelerometer motion data, heart rate signals, and user profile i...
Read itWhat a Smartwatch's SpO2 Sensor Measures
A smartwatch SpO2 sensor estimates blood oxygen saturation using light absorption — here is what that measurement act...
Read itHow a Pedometer Counts Steps via Pendulum
A pendulum-based pedometer counts steps by detecting a swinging lever arm triggered by vertical hip movement, not by ...
Read itHow GPS Estimates Distance on a Running Watch
GPS distance on a running watch is a calculated estimate derived from satellite geometry, signal timing, and onboard ...
Read itWhat an Accelerometer Measures in a Tracker
A fitness tracker's accelerometer measures changes in motion and orientation, which software then interprets as steps or activity type.
Read articleCapacity Ratings on Fitness Trackers Explained
Capacity ratings on fitness wearables define sensor and structural limits — understanding what they measure and where they fail clarifies what the data…
Read articleHow an Optical Heart Rate Sensor Reads a Pulse
An optical heart rate sensor shines light into skin and measures how much reflects back as blood volume changes with each pulse.
Read articleAll Fitness Articles
- How a Fitness Tracker Converts Wrist Motion
- How a Fitness Tracker Detects Sleep Stages
- Chest Strap vs. Wrist Sensor: How Each Works
- How a Fitness Tracker Estimates Calories Burned
- What a Smartwatch's SpO2 Sensor Measures
- How a Pedometer Counts Steps via Pendulum
- How GPS Estimates Distance on a Running Watch
- What an Accelerometer Measures in a Tracker
- Capacity Ratings on Fitness Trackers Explained
- How an Optical Heart Rate Sensor Reads a Pulse