Zone 2 training refers to aerobic exercise performed at an intensity where blood lactate concentration remains below 2.0 mmol/L. At this exact metabolic output, Type I slow-twitch muscle fibers utilize oxygen and fatty acids to produce ATP, generating maximum mitochondrial density with minimal central nervous system fatigue. This guide to zone 2 running explains how to find your target heart rate and build endurance.
Key Takeaways
- Zone 2 cardio targets 60% to 70% of maximum heart rate or 45% to 55% of VO2 max.
- Enhances mitochondrial efficiency, cytochrome c oxidase activity, and metabolic lactate clearance capacity.
- Longevity protocols recommend 150 to 180 minutes of Zone 2 training accumulated weekly across 3 to 4 sessions.
- Determine your exact heart rate parameters using our Target Heart Rate Calculator and track physical rejuvenation via the Biological Age Calculator.
- Convert daily movement into energy expenditure with our Steps to Calories Calculator.
Zone 2 Running: How to Find Your Target Heart Rate
Zone 2 running typically falls between 60-70% of your maximum heart rate. Our guide to staying active includes practical tips for fitting Zone 2 sessions into a busy schedule.
Zone 2 Running Benefits for Longevity
Regular zone 2 running improves mitochondrial density and metabolic health, key factors in longevity. Morning sessions also help anchor your circadian rhythm for better sleep quality.
References
- San-Millán I, Brooks GA. Assessment of Metabolic Flexibility and General Physiology in Elite Athletes. Sports Med, 2018.
- AHA. Exercise Standards for Testing and Training. Circulation.
