Understanding Zone Three
Zone three running can be beneficial when incorporated thoughtfully into training. While it's important to primarily focus on zone two, including up to 30% of your easy runs in zone three can enhance performance and mechanics. However, caution is advised due to the increased impact and injury risk associated with this intensity.In this clip
From this podcast

The Strength Running Podcast
Zone 2 Q&A: Can You Run Too Slow? When Does Easy Pace Get Faster?
Related Questions
What is better for training, Zone 2 or Zone 3, based on the episode Zone 2 Q\&A: Can You Run Too Slow? When Does Easy Pace Get Faster? and the clip Understanding Zone Three?
If I've got a limited amount of time, is it better to train just Zone 2 cardio or also include Zone 3-4 in the episode s3/e44 How to Get Faster on Low Run Volume Training with Kim Nedeau and the clip Understanding Zone Three?
Is a tempo run in Zone 2 or Zone 3?