Lief

What it does

Lief is the clinically validated mental health wearable that trains your nervous system to stay calm. Developed with Harvard and Stanford collaborators, Lief uses HRV biofeedback to reduce stress, ease anxiety, and improve sleep — naturally.

You have the ability to transform how you feel. It’s a skill, and we’re here to help you build it. With Lief, you’ll learn how to train your body to stay calm and focused when you need it most. Lief measures your heart and breath to track your stress levels in real-time, using a clinically-proven biomarker of stress called heart rate variability (HRV). When you're under pressure, learn to control your body's natural stress response through gentle, safe HRV biofeedback exercises. Practice when you need it by following the vibrations. It's just 3 minutes, and you can do it anywhere. As your average HRV increases, you'll feel the difference and experience the power of calming your mind…from lief.ai

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