Core Web Vitals
Core Web Vitals are a set of specific metrics Google uses to measure user experience on your website. They focus on loading speed, interactivity, and visual stability. The three main metrics are Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS).
Why do Core Web Vitals matter for fitness businesses?
Core Web Vitals directly impact rankings. Google uses them as ranking signals, meaning sites with poor scores can lose visibility even if their content is excellent. A workout tracking app with slow load times might rank below competitors with faster experiences, even if the app itself is superior.
User experience affects conversions. For fitness platforms relying on free trials or demo signups, slow pages mean lost revenue regardless of traffic volume.
Mobile performance matters especially for fitness businesses. People searching for gyms, comparing workout apps, or looking up exercise tutorials often do so on mobile devices. Poor Core Web Vitals on mobile hurt both rankings and user retention.
What do Core Web Vitals look like in practice?
A gym management platform notices their pricing page has a high bounce rate. They check Core Web Vitals and discover LCP is 5.2 seconds (poor) because large images load slowly. They compress images, implement lazy loading, and optimise server response time. LCP drops to 1.8 seconds (good), bounce rate decreases by 23%, and organic traffic to that page increases as Google rewards the improved experience.
What are the three Core Web Vitals metrics?
Largest Contentful Paint (LCP) measures loading performance. It tracks how long it takes for the largest visible element on your page to fully load. Good LCP is 2.5 seconds or less. Slow LCP frustrates users who see blank screens or partially loaded content.
First Input Delay (FID) measures interactivity. It tracks the time between when a user first interacts with your page (clicks a button, taps a link) and when the browser responds. Good FID is 100 milliseconds or less. High FID makes sites feel unresponsive.
Cumulative Layout Shift (CLS) measures visual stability. It tracks unexpected layout shifts where content moves after the page starts loading. Good CLS is 0.1 or less. High CLS happens when images load without defined dimensions or ads push content around, frustrating users who accidentally click the wrong thing.
How do you check Core Web Vitals?
Use Google Search Console's Core Web Vitals report to see which pages have good, need improvement, or poor scores. The report groups pages by similar issues.
Run individual page tests with Google PageSpeed Insights to get specific recommendations for improving each metric.
Monitor real user data through Chrome User Experience Report, which shows how actual visitors experience your site rather than lab simulations.
Track Core Web Vitals over time to ensure improvements stick and identify when updates or new content hurt performance.
How do you improve Core Web Vitals?
To improve Core Web Vitals:
- Optimise images by compressing files, using modern formats like WebP, and implementing lazy loading so images below the fold don't slow initial page load
- Minimise JavaScript and CSS that block rendering, deferring non-critical scripts until after the page loads
- Use a Content Delivery Network (CDN) to serve content faster by delivering files from servers geographically closer to users
- Set explicit width and height attributes on images and embed elements to prevent layout shifts as content loads
- Reduce server response time by upgrading hosting, implementing caching, or optimising database queries
- Preload critical resources like fonts or hero images so they load immediately rather than causing delays
Questions to ask your agency
"What are our current Core Web Vitals scores, and which pages are failing? What specific issues are causing poor scores, and what's the plan to fix them? Are we monitoring Core Web Vitals regularly to catch problems before they impact rankings?"