Zone 2 training refers to aerobic exercise performed at a low-to-moderate intensity, typically between 60% and 70% of your maximum heart rate. At this effort level, you should be able to hold a conversation without gasping for breath. It targets the body's aerobic energy system and relies heavily on fat as a fuel source, making it a cornerstone of endurance training programs.
The physiological benefits of Zone 2 training are substantial. It increases mitochondrial density in muscle cells, improves the efficiency of fat oxidation, enhances capillary density for better oxygen delivery, and strengthens the heart's stroke volume. Over time, these adaptations allow you to sustain higher intensities before reaching your lactate threshold, meaning you get faster and more resilient without the wear and tear of constant high-intensity training.
Zone 2 training has gained renewed attention from longevity researchers and sports scientists alike. Dr. Peter Attia and other prominent voices in health optimization have highlighted its role in metabolic health, insulin sensitivity, and cardiovascular disease prevention. For recreational athletes and fitness enthusiasts, spending 60–80% of total training time in Zone 2 is a widely recommended approach.
Practical Zone 2 sessions include brisk walking, easy jogging, cycling at a conversational pace, or rowing. Sessions typically last 30–60 minutes or longer. Using a heart rate monitor integrated with Vora ensures you stay in the correct zone, and Vora's AI coaching can build Zone 2 sessions into your weekly plan based on your recovery status and fitness goals.