Daily Junction.mobi portal<p><span><a href="https://theconversation.com/profiles/shaun-phillips-2761530">Shaun Phillips</a>, Senior Lecturer in Sport and Exercise Physiology, <em><a href="https://theconversation.com/institutions/university-of-edinburgh-905">University of Edinburgh</a></em></span></p>
<p>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/feeling-the-burn-its-not-lactic-acid-291432">original article</a>.</p> </div>