<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Muscles | smithsonianmag.com</title><link>https://www.smithsonianmag.com/rss/tag/muscles/</link><description>RSS feed for Muscles</description><atom:link href="https://www.smithsonianmag.com/rss/tag/muscles/" rel="self"/><language>en</language><lastBuildDate>Fri, 04 Sep 2026 15:16:21 +0000</lastBuildDate><item><title>GLP-1 Weight-Loss Drugs Can Slow Aging and Extend Life Span, Mouse Study Suggests</title><link>https://www.smithsonianmag.com/smart-news/GLP-1-weight-loss-drugs-can-slow-aging-and-extend-lifespan-mouse-study-suggests-180989452/</link><description>Older female mice—equivalent in age to 60-year-old women—given daily injections of the active ingredient in Ozempic lived about 12 percent longer than animals that didn't receive the drug</description><pubDate>Fri, 04 Sep 2026 15:16:21 +0000</pubDate><guid>https://www.smithsonianmag.com/smart-news/GLP-1-weight-loss-drugs-can-slow-aging-and-extend-lifespan-mouse-study-suggests-180989452/</guid><enclosure length="11866513" type="image/jpeg" url="https://th-thumbnailer.cdn-si-edu.com/2AOYC0sfvDbp_lfPShLuLxOb0Q4=/420x240/filters:focal(3840x2176:3841x2177)/https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer_public/bc/df/bcdf38b1-5940-4466-8703-d20d1d334481/ozempic.jpg"/></item></channel></rss>