What it is
Regulatory status: health and fitness practice
Mechanism evidence: human
At a glance
What it is, why people use it, the evidence, and what to know before trying it.
Why people use it
- Cardiorespiratory fitness
- Strength and physical function
- Lower cardiometabolic and mortality risk
Evidence at a glance
Regular physical activity has strong evidence for health and functional benefit. A mixed program is sensible for breadth, but no evidence establishes Bryan Johnson's exact 90-minute daily combination as optimal for everyone.
Confidence: strong
Practice safety
Situations where this practice may need modification or professional guidance.
Injury and cardiac risk depend on baseline health, intensity, technique and progression. New symptoms, known cardiovascular disease, major joint disease or prolonged inactivity may require medical assessment and supervised programming.
Forms and variants
This review does not automatically apply to:
- single-mode cardio
- resistance training alone
- HIIT alone
- rehabilitation prescribed for a specific injury
Seen in protocols
Public protocols that include Mixed exercise training. Open one to see the full context and source.