Zone 2 exercise is low-intensity aerobic activity that primarily improves mitochondrial function. By increasing the number and efficiency of mitochondria, it enhances the body's ability to use fat for fuel, improves metabolic flexibility, and reduces the risk of metabolic diseases like type 2 diabetes and cardiovascular disease. This cellular-level optimization is fundamental to maintaining energy production and physiological resilience with age.
Verdict
A foundational, low-risk pillar of any healthspan-focused exercise regimen.
HEALTHSPAN IMPACT
Foundational
RISK LEVEL
Very Low
EVIDENCE GRADE
A
MONTHLY COST
$0 - $100
Protocol
- Accumulate 150-300 minutes per week, often in 3-5 sessions of 45-60 minutes each.
- Maintain an intensity where you can hold a conversation, roughly 60-70% of maximum heart rate.
Flags
- Consult a physician before starting if you have pre-existing cardiovascular conditions.
- Proper form and gradual progression are crucial to prevent musculoskeletal injury.
- Intensity is key; often defined as 60-70% of max heart rate or by the 'talk test'.