Last bit of speed work before the LA Marathon. 

Any casters signed up for the race?

This graph is from the Stryd - Running Power app. 

Red - Heart Rate
Orange- Power
Blue - Pace

The heart rate data you see on the Stryd app is sourced from the Apple Watch on my wrist. Additionally, I run with a dedicated heart rate monitor strapped around my chest from Morpheus. This data is slightly more accurate and aids in tracking my recovery.  *time is off because I start HRM a little earlier.

The heart rate is collected by another device different from stryd itself, correct?