Zone 2 cardio — easy conversational pace, 60-70% of max heart rate — is the most-underrated training mode. Builds aerobic base, improves recovery between hard sessions, doesn't tax recovery itself. Most women over-train at high intensity (HIIT) and under-train Zone 2.
What Zone 2 actually feels like
You can hold a conversation in full sentences. Breathing is elevated but not laboured. Sustainable for 45-90 minutes without crashing. For most women, brisk walking on inclines, slow jogging, or easy cycling.
Why it works
Builds mitochondrial density and fat metabolism. Improves recovery capacity. Foundation that makes high-intensity work more productive. Lower injury risk than HIIT. Sustainable lifelong.
Aim for 150+ minutes of Zone 2 weekly alongside strength training. Use heart rate monitor or breathing-test to confirm intensity. Most plateaus in fitness come from too much Zone 4-5 and too little Zone 2.