Garmin Garmin HRM-Run

Amazon.com Price: $99,99 (as of 21/01/2021 18:40 PST- Details) & FREE Shipping.

HRM-Run provides 6 different rynning dynamics metrics: cadence, vertical oscillation, ground contact time, ground contact time balance, stride length and vertical ratio
The strap is comfortable and easily adjustable
Real-time data can help athletes take their performance to the next level by showing them where they can improve their running form