# Activity Analysis

Canonical HTML: https://effortsignal.com/features/activity-analysis/

Last content update: 2026-09-09

Follow the workout from its summary into the streams and efforts that explain the result. Metrics remain explicitly unavailable when the recording does not contain enough sensor evidence.

## One aligned timeline

Read power, heart rate, speed, cadence, elevation and other recorded streams against the same elapsed-time axis, so a change in one signal stays connected to the rest of the workout.

## Intervals and efforts

Inspect source laps and automatically detected work and recovery efforts. Compare the duration, output and response of each block without losing where it happened.

## Power and heart rate in context

Use weighted power, intensity, zones, best efforts, power and heart-rate curves, training load and threshold-relative context when the underlying recording supports them.

## Aerobic response and terrain

Review aerobic decoupling and Efficiency Factor alongside the map, elevation and grade. Availability stays explicit when duration, terrain or sensor coverage cannot support a metric.