Chronic stress accelerates biological aging. That's not speculation—it's well-documented in longevity research. But what matters isn't just how much stress you face; it's how well your body handles it. That's why MyBioAge now includes a Stress Resilience Score (0-100) that measures your body's ability to adapt to and recover from stress.

What is Stress Resilience?

Stress Resilience isn't about avoiding stress—it's about your body's capacity to handle it without lasting damage. Someone with high stress resilience can face demanding situations and bounce back quickly. Their nervous system returns to baseline, their sleep stays solid, and their recovery metrics hold steady.

Someone with low stress resilience shows the opposite pattern: stress lingers in their system, disrupting sleep, suppressing HRV, and slowing recovery even after the stressor passes.

How MyBioAge calculates your score

The Stress Resilience Score analyzes four key dimensions from your Apple Health data:

HRV patterns — How quickly your heart rate variability rebounds after stress. Higher HRV and faster recovery indicate better stress adaptation.
Recovery trends — How consistently you return to your personal baseline after challenging days. Stable recovery = stronger resilience.
Sleep quality — Does stress disrupt your sleep? Resilient people maintain sleep quality even during tough periods.
Activity balance — Are you overtraining or undermoving when stressed? Both extremes indicate lower resilience.

Understanding your score

Your Stress Resilience Score ranges from 0 to 100:

80-100 (Green) — Excellent resilience. Your body handles stress well and recovers quickly. Keep doing what you're doing.
50-79 (Yellow) — Moderate resilience. There's room for improvement. Focus on recovery practices and stress management.
0-49 (Red) — Low resilience. Stress is taking a toll. Prioritize sleep, reduce training load, and consider adding recovery protocols.

Why stress resilience matters for biological age

Chronic stress drives inflammation, disrupts hormone balance, and accelerates cellular aging. People with low stress resilience age faster at the cellular level—their telomeres shorten more quickly, their inflammatory markers stay elevated, and their metabolic health suffers.

By tracking and improving your Stress Resilience Score, you're directly addressing one of the key factors in biological aging. It's not just about feeling better; it's about aging better.

How to improve your score

Stress resilience is trainable. Here are evidence-based approaches:

Prioritize sleep — Nothing builds resilience like consistent, quality sleep. Aim for 7-9 hours with regular timing.
Practice recovery breathing — Even 5 minutes of slow, deep breathing activates your parasympathetic nervous system.
Balance training intensity — Hard workouts stress your body. Make sure you're recovering before adding more load.
Build recovery rituals — Regular practices like walks, stretching, or meditation compound over time.

Ask the AI Coach

The MyBioAge AI Coach understands your Stress Resilience Score. Ask questions like "How's my stress resilience?" or "What's hurting my stress recovery?" to get personalized insights based on your actual health data.

Track it on Apple Watch

Your Stress Resilience Score is now available on Apple Watch with color-coded status indicators. Green, yellow, or red feedback tells you instantly how your body is handling stress—no need to open your phone.