Learn: The Science Behind Your Health Data

Understanding your health data starts with understanding the metrics. These articles cover the science behind the numbers your wearable collects, written in plain language with references to established research.

All Heart Health Sleep Training Recovery Fitness
Heart Health 9 min

Heart Rate Variability: The Complete Guide

What HRV is, why it matters, normal ranges by age, and how to improve it.
Heart Health 7 min

Resting Heart Rate: What Your Baseline Says About You

How resting heart rate reflects cardiovascular fitness and long term health.
Heart Health 7 min

Stress and HRV: How Your Body Responds to Pressure

The connection between chronic stress, autonomic balance, and heart rate variability.
Sleep 8 min

How Much Sleep Do You Actually Need?

Evidence based sleep recommendations by age, activity level, and individual factors.
Sleep 7 min

Sleep Debt: Can You Pay It Back?

What sleep debt is, how it accumulates, and what the research says about recovering it.
Training 8 min

Heart Rate Zones Explained

What each heart rate zone means, how to find yours, and when to train in each one.
Training 8 min

Overtraining Syndrome: Signs, Science, and Prevention

How to recognize overtraining before it derails your progress.
Recovery 8 min

The Science of Recovery: Why Rest Is Where Fitness Happens

The physiology behind recovery, why HRV is the best recovery marker, and how to optimize rest.
Fitness 8 min

VO2 Max: The Single Best Predictor of Longevity

What VO2 Max measures, why it matters for healthspan, and how to improve it.
Fitness 8 min

Biological Age: Is Your Body Older or Younger Than You?

How biological age differs from chronological age and what biomarkers matter.

Interactive Tools

Put the concepts into practice with these free calculators.

Sleep Tool

Sleep Need Calculator

Estimate your personal sleep need based on age, activity level, and goals.

 Heart Health Tool

HRV Score Interpreter

See where your HRV falls for your age and understand what it means.

Put the science into practice.

Laso turns these metrics into personalized, actionable insights from your wearable data.

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