---
title: "How Much Should Runners Trust Wrist-Worn Heart Rate Readings During Intervals?"  
description: "How Much Should Runners Trust Wrist-Worn Heart Rate Readings During Intervals?"  
author: "Yasmin Obeidat"  
published: 2026-10-15  
canonical: https://answers.mindstick.com/qa/117528/how-much-should-runners-trust-wrist-worn-heart-rate-readings-during-intervals  
category: "Mix Category"  
tags: ["Running", "Sports technology", "Wearables"]  
reading_time: 1 minute  

---

# How Much Should Runners Trust Wrist-Worn Heart Rate Readings During Intervals?

During easy runs, my watch’s heart-rate reading seems believable. During short intervals, though, it sometimes jumps well above what I expect and stays there briefly even after I slow down.

For people who train with intervals, how useful is a wrist sensor for judging effort in the moment? I’m curious whether fit, cold weather, or the quick changes in pace can affect **wrist heart rate readings**, and when a chest strap makes a noticeable difference.


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Original Source: https://answers.mindstick.com/qa/117528/how-much-should-runners-trust-wrist-worn-heart-rate-readings-during-intervals

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