The Zone 2 training heart rate for a 30-year-old would be between 114-133 bpm. Adjust your exercise intensity to stay in zone 2. You get a lot of bang for your buck. 00:12:54 Why should I do Zone 2 exercise compared to HIIT? Zone 2 stresses the body very little. Here youll get the most benefits in the least amount of time. Zone 2 />