Journal

Health
Journal

Research-backed articles on sleep, recovery, and training.

Sleep

Sleep / 12 min

Sleep: the world's most underrated medicine

What sleep loss does to the brain, immunity, and hormones.

HRV

HRV / 11 min

What heart rate variability is and why it matters

Cardio capacity

Cardio / 11 min

Cardio capacity and long-term health

Strength training

Training / 10 min

Strength training and resilience with age

Sarcopenia and muscle mass

Muscle / 7 min

Why muscle mass declines after 30

HRV and immunity

HRV / 6 min

How HRV changes relate to illness and load

VO2 max and longevity

VO2 max / 5 min

Why the cardio fitness trend matters

Sleep apnea

Sleep / 12 min

Sleep apnea: the most common breathing disorder you've never been diagnosed with

Start with the essentials

What is HRV Recovery score Training readiness

Understand your body
every day

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