Guide

Why Do I Feel Incredible After Yoga But Destroyed After HIIT

Different types of movement have fundamentally different effects on the nervous system. Yoga and low-intensity movement tend to activate the parasympathetic nervous system — rest and digest. HIIT activates the sympath...

By Normal Editorial TeamPersonal health intelligence research and product teamUpdated June 19, 2026

Why it matters

Different types of movement have fundamentally different effects on the nervous system. Yoga and low-intensity movement tend to activate the parasympathetic nervous system — rest and digest. HIIT activates the sympathetic system — fight or flight. For people who are already running in a chronically stressed state, high-intensity exercise on top of existing stress can push the nervous system further into exhaustion rather than building resilience. If HIIT consistently leaves you feeling depleted rather than energised, your current stress and recovery load is almost certainly the reason.

When Normal helps

Normal tracks your response to different types of movement over time. It finds whether your post-exercise feeling is consistent for each type of exercise and whether your current stress and recovery state is determining how you respond. It finds your personal movement formula.

How Normal finds it

Tell Normal what type of exercise you did and how you felt afterward. Over a month it finds which types of movement consistently make you feel better and which ones deplete you — and whether the pattern changes based on your stress and recovery state.

Editorial note

How to read this guide

Normal guides focus on pattern tracking: comparing symptoms, meals, sleep, stress, movement, routines, and timing over repeated days so people can notice what reliably changes how they feel.

Normal is not a medical provider. This guide is for general informational purposes and should not be used as medical advice, diagnosis, or treatment.

Start with your body

Normal finds the pattern behind how you feel.

Tell Normal what happened in plain language. It connects your food, sleep, movement, stress, and symptoms over time.