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· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
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Detailed Report

Audit breakdown by category with detailed findings.

86

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.123663] map[node:map[boundingRect:map[bottom:15318 height:15163 left:0 right:1350 top:155 width:1350] lhId:page-19-MAIN nodeLabel:BOSTON MARATHON ‘I KEPT GOING’: HOW THE FINAL OFFICIAL FINISHER OF THE BOSTON M… path:1,HTML,1,BODY,1,DIV,7,MAIN selector:body > div#__next > main#main-content snippet:<main id="main-content" class="css-rk6tbh ewq0ot91"> type:node] score:0.07719] map[node:map[boundingRect:map[bottom:881 height:188 left:882 right:1275 top:692 width:393] lhId:page-15-A nodeLabel:RUNNER'S WORLD+ STORY PREVIEWS Why Your Long Run Matters More Than Weekly Milea… path:1,HTML,1,BODY,1,DIV,7,MAIN,2,SECTION,0,DIV,1,DIV,0,DIV,2,A selector:div.css-1o1ws1x > div > div.css-hhmn3a > a.ee4ms354 snippet:<a data-theme-key="custom-item" label="" data-vars-cta=" 3" data-vars-ga-position="4" data-vars-ga-call-to-action="Why Your Long Run Matters More Than Weekly Mileage" data-vars-ga-outbound-link="https://www.runnersworld.com/training/a71086167/amazing-runners-world-show…" data-vars-ga-ux-element="big_story_feed_block" href="/training/a71086167/amazing-runners-world-show-epsiode-112-10-percent-rule…" class="ee4ms354 css-1h7z8fd e1socmtw0"> type:node] score:0.029406] map[node:map[boundingRect:map[bottom:881 height:188 left:882 right:1275 top:692 width:393] lhId:page-15-A nodeLabel:RUNNER'S WORLD+ STORY PREVIEWS Why Your Long Run Matters More Than Weekly Milea… path:1,HTML,1,BODY,1,DIV,7,MAIN,2,SECTION,0,DIV,1,DIV,0,DIV,2,A selector:div.css-1o1ws1x > div > div.css-hhmn3a > a.ee4ms354 snippet:<a data-theme-key="custom-item" label="" data-vars-cta=" 3" data-vars-ga-position="4" data-vars-ga-call-to-action="Why Your Long Run Matters More Than Weekly Mileage" data-vars-ga-outbound-link="https://www.runnersworld.com/training/a71086167/amazing-runners-world-show…" data-vars-ga-ux-element="big_story_feed_block" href="/training/a71086167/amazing-runners-world-show-epsiode-112-10-percent-rule…" class="ee4ms354 css-1h7z8fd e1socmtw0"> type:node] score:0.01694] map[node:map[boundingRect:map[bottom:28 height:28 left:135 right:227 top:0 width:93] lhId:page-24-A nodeLabel:Newsletter path:1,HTML,1,BODY,1,DIV,4,NAV,0,DIV,0,DIV,1,A selector:nav.css-1pnlqgj > div.css-oprpp7 > div.css-fcw4so > a.css-1yag5g9 snippet:<a href="/email/runnersworld-newsletter" class="css-1yag5g9 ebcwvhg6"> type:node] score:7.3e-05] map[node:map[boundingRect:map[bottom:28 height:28 left:135 right:227 top:0 width:93] lhId:page-24-A nodeLabel:Newsletter path:1,HTML,1,BODY,1,DIV,4,NAV,0,DIV,0,DIV,1,A selector:nav.css-1pnlqgj > div.css-oprpp7 > div.css-fcw4so > a.css-1yag5g9 snippet:<a href="/email/runnersworld-newsletter" class="css-1yag5g9 ebcwvhg6"> type:node] score:5.4e-05]]

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLEst Savings
fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff235 ms
/_assets/design-tokens/fre/static/fonts/inter-v3-latin-re...20 ms
/_assets/design-tokens/runnersworld/static/fonts/6de96ad7...15 ms
/_assets/design-tokens/fre/static/fonts/inter-v3-latin-70...5.0 ms
/_assets/design-tokens/runnersworld/static/fonts/FuturaNo...5.0 ms
/_assets/design-tokens/runnersworld/static/fonts/FuturaNo...5.0 ms

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:76.61 source:map[type:text value:[unattributed]]] map[reflowTime:12.728 source:map[column:18070 line:0 type:source-location url:https://www.runnersworld.com/_assets/moapt/2.437.0/moapt-bundle-hdm.js urlProvider:network]]]

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
Memoir book and magazines focused on running and fitness. div.css-79elbk > div.__resp-container > picture.css-0 > img
/hmg-prod/images/0d475dc8-b05a-4541-a6cd-6bc59d8bc281.jpg...96.9 KiB49.1 KiB
Person wearing a marathon finisher outfit and medal, standing on stairs. div.css-79elbk > div.__resp-container > picture.css-0 > img
/hmg-prod/images/a2e17d55-46b2-48f5-976c-6e1d54d9e2fe.jpe...95.5 KiB48.4 KiB
130th Boston Marathon a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img.css-0
/hmg-prod/images/03392aa3-c636-4b9d-adab-4358114c9476.jpe...47.3 KiB44.2 KiB
Person jogging on a gravel path surrounded by greenery. a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img.css-0
/hmg-prod/images/0a0e1085-60a1-43f7-95b0-65f54f6fb1a7.jpg...46.3 KiB43.2 KiB
Illustration of a character performing various running and stretching movements. a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img.css-0
/hmg-prod/images/9df8ac0f-f27e-45d8-a107-a16a621e0f46.jpg...39.7 KiB36.6 KiB
Person running on a gravel path in a natural setting. a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img.css-0
/hmg-prod/images/7019ff78-cfb4-4dbe-a716-1cdc0a2448e3.jpg...40.8 KiB35.3 KiB
Three individuals walking or jogging on a path surrounded by trees. a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img.css-0
/hmg-prod/images/2741de0a-f310-4ae6-a93f-fcb221fa1761.jpg...36.0 KiB30.4 KiB
A runner in an orange shirt and shorts on a treelined path during autumn a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img.css-0
/hmg-prod/images/rw-matt-meyer-017-675b49ba78f02.jpg?crop...30.8 KiB25.2 KiB
three runners on gravel path a.ee4ms354 > div.css-79elbk > div.css-1hpb4i6 > img.css-0
/hmg-prod/images/running-training-plans-mcadams-023-67f3f...93.4 KiB24.8 KiB
Two individuals sitting and holding water bottles. a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img.css-0
/hmg-prod/images/6d8e3be2-9ba2-43eb-bf12-64eec72af129.jpg...27.4 KiB21.8 KiB
Rescue scene with individuals providing aid. a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img.css-0
/hmg-prod/images/6b7b3d6f-717c-4a7b-9f76-1031d8b7d19c.jpg...20.5 KiB17.5 KiB
Why Your Long Run Matters More Than Weekly Mileage a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img.css-0
/hmg-prod/images/b412aed3-74a4-448f-b517-6e53cf0ca145.jpg...20.2 KiB17.3 KiB
Plate with rise and vegetables on kitchen scales closeup a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img.css-0
/hmg-prod/images/69f18688-2d06-4425-ba72-e7da11e7dcfb.jpe...16.4 KiB14.0 KiB
garmin® venu® x1, thin and lightweight gps smartwatch, amoled display, advanced… a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img.css-0
/hmg-prod/images/garmin-venu-x1-008-68ed4e0b2d1ed.jpg?cro...14.6 KiB12.5 KiB

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-1-IMG
nodeLabel: Person wearing a marathon finisher outfit and medal, standing on stairs.
path: 1,HTML,1,BODY,1,DIV,7,MAIN,2,SECTION,0,DIV,0,A,0,DIV,0,DIV,0,PICTURE,6,IMG
selector: div.css-79elbk > div.__resp-container > picture.css-0 > img
snippet: <img src="https://hips.hearstapps.com/hmg-prod/images/a2e17d55-46b2-48f5-976c-6e1d54…" alt="Person wearing a marathon finisher outfit and medal, standing on stairs." width="4284" height="5712" decoding="async" loading="lazy" sizes="100vw">

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates
value: No additional origins are good candidates for preconnecting

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
nexus.ensighten.com/hearst/mag/Bootstrap.js300.0 s19.0 KiB
www.gstatic.com/recaptcha/api2/logo_48.png604800.0 s2.3 KiB

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 242 ms
URLTime Spent
runnersworld.com/242 ms
www.runnersworld.com/0.0 ms

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

Why this matters

Performance issues directly impact user engagement and conversion rates.

ElementLayout shift score
BOSTON MARATHON ‘I KEPT GOING’: HOW THE FINAL OFFICIAL FINISHER OF THE BOSTON M… body > div#__next > main#main-content
0.077
RUNNER'S WORLD+ STORY PREVIEWS Why Your Long Run Matters More Than Weekly Milea… div.css-1o1ws1x > div > div.css-hhmn3a > a.ee4ms354
0.029
RUNNER'S WORLD+ STORY PREVIEWS Why Your Long Run Matters More Than Weekly Milea… div.css-1o1ws1x > div > div.css-hhmn3a > a.ee4ms354
0.017
Newsletter nav.css-1pnlqgj > div.css-oprpp7 > div.css-fcw4so > a.css-1yag5g9
0.000
Newsletter nav.css-1pnlqgj > div.css-oprpp7 > div.css-fcw4so > a.css-1yag5g9
0.000

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

Diagnostics

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 160 ms 520.3 KiB
URLTransfer SizeEst Savings
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js361.8 KiB177.4 KiB
/pagead/managed/js/gpt/m202604210101/pubads_impl.js?cb=31...187.5 KiB140.3 KiB
www.runnersworld.com/_assets/moapt/2.437.0/moapt-bidder-pb-hdm.10.23.0.js107.1 KiB85.0 KiB
www.runnersworld.com/_assets/moapt/2.437.0/moapt-bundle-hdm.js57.1 KiB47.3 KiB
www.runnersworld.com/_assets/moapt/2.437.0/moapt-data.js52.8 KiB47.2 KiB
/_assets/fre/scopes/hdm/_next/static/chunks/main-d2f686aa...41.3 KiB23.1 KiB

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
Pages with cache-control:no-store header cannot enter back/forward cache.Actionable
Pages whose main resource has cache-control:no-store cannot enter back/forward cache.Not actionable
Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header.Not actionable

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js362.4 KiB
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js361.9 KiB
/pagead/managed/js/gpt/m202604210101/pubads_impl.js?cb=31...187.6 KiB
www.runnersworld.com/117.2 KiB
www.runnersworld.com/_assets/moapt/2.437.0/moapt-bidder-pb-hdm.10.23.0.js107.7 KiB
www.runnersworld.com/news/a71088131/final-finisher-boston-marathon-2026/97.7 KiB
/hmg-prod/images/0d475dc8-b05a-4541-a6cd-6bc59d8bc281.jpg...97.3 KiB
/hmg-prod/images/a2e17d55-46b2-48f5-976c-6e1d54d9e2fe.jpe...95.8 KiB
/hmg-prod/images/running-training-plans-mcadams-023-67f3f...93.7 KiB
www.runnersworld.com/_assets/moapt/2.437.0/moapt-bundle-hdm.js57.7 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
Person wearing a marathon finisher outfit and medal, standing on stairs. a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
/hmg-prod/images/a2e17d55-46b2-48f5-976c-6e1d54d9e2fe.jpe...
Rescue scene with individuals providing aid. a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
/hmg-prod/images/6b7b3d6f-717c-4a7b-9f76-1031d8b7d19c.jpg...
runner at the finish line of the boston marathon a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
/hmg-prod/images/5368a9d5-604e-444c-af03-5b4cb3525acf.jpg...
Runner crossing the finish line at the Boston Marathon. a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
/hmg-prod/images/efcd3df6-1492-435e-a9cc-e995b664eb03.jpe...
Athlete crossing the finish line of the Boston Marathon a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
/hmg-prod/images/3b980875-ff10-4c9c-99e3-477b4c28d120.jpg...
Start line of a marathon with runners taking off and spectators cheering. a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
/hmg-prod/images/78c524f0-e56c-4ed7-9849-81ad24ca44d4.jpg...
129th Boston Marathon a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
/hmg-prod/images/32c958fb-9102-47bd-84c9-8f306f3c8530.jpe...
129th Boston Marathon a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
/hmg-prod/images/7f2fc403-9d89-4479-9985-4a71e779cf10.jpe...
Crowd enthusiastically capturing a fitness event on their phones. a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
/hmg-prod/images/39a11f42-1ccf-4de1-889f-81ab9d0c1498.jpg...
US-SPACE-BOEING-STARLINER-AEROSPACE a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
/hmg-prod/images/439da0cf-a17a-4c02-b842-75d46552fb7b.jpe...
2025 Boston Marathon a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
/hmg-prod/images/2aeccb23-67b9-429f-af27-eb9a82448c2f.jpe...
129th Boston Marathon a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
/hmg-prod/images/6e44aff0-7dbf-4049-a33f-45d93faed859.jpe...
Logo div.css-mt5vg7 > a.css-8aa961 > div.css-zcysxb > img.css-7flfmd
/_assets/design-tokens/runnersworld/static/images/logos/l...
runners on an athletic track a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
person jogging past a brick building a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
participants running in a marathon on a city street lined with shops a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
group of people jogging along a path by a body of water a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
best treadmills a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
people running on treadmills inside a gym with a sale sign a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
a person using a walking pad in an office a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
Mid adult man running on treadmill at the gym a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
group of massage guns on grass a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
lululemon run times bra a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
Black slides positioned on a stone surface near grass. a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
a pair of basic running watches on a textured surface a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
coros pace 4, indoor run selection a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
garmin enduro 3 a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
Jeff Dengate starting a run on a Garmin watch a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
wrist displaying a smartwatch with various fitness metrics a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
Individual holding their knee in a street setting. a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
Person stretching on a wooden bridge. a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
three runners moving along a street with fallen leaves a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
bunion pain relief a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
emily sisson chicago a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
Athletics - Olympic Games Paris 2024: Day 9 a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
129th Boston Marathon a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
Female athlete doing kettlebell outdoor. a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
in the dietitian's office, the table is set with vegetables, fruits, nuts, brea… a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
Glass of matcha on pink background. Matcha green tea powder in bright sunlight a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
TOPSHOT-ULTRA-TRAIL-FRA-UTMB a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
A female with cgm jogging for exercise a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
runners world zone 2 running mix a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
text promoting a march running mix with individuals jogging on a pavement a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
women jogging in winter attire on a snowy path, runners world february running … a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
a 3 hour playlist for long runs a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
Person running in athletic wear. a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
Woman checking heart rate after sports training a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
a man running on a street a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
Individual running in an outdoor setting. a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
130th Boston Marathon a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
US-MARATHON-BOSTON a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
Runners participating in a marathon or race. a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img
boston marathon medal shadow over race bibs a.ee4ms354 > div.css-79elbk > div.css-ftsoqv > img

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Max Potential First Input Delay 100 ms
●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Render blocking requests
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●Reduce unused CSS
●User Timing marks and measures 24 user timings
●JavaScript execution time 0.6 s
●Minimizes main-thread work 1.4 s
●Avoid long main-thread tasks 3 long tasks found
●Avoid non-composited animations 1 animated element found
●Network Requests
●Network Round Trip Times 30 ms
●Server Backend Latencies 100 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 0 ms
○INP breakdown
95

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Are you looking to run the best race of your life? section > div.css-16rytbi > div.css-vn3aqv > h4.css-n8v6xh

These are opportunities to improve keyboard navigation in your application.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
BOSTON MARATHON a.ee4ms354 > div.css-1ogcqtu > div.css-1sfzy4a > a.css-1o9os3o
MARATHON TRAINING a.ee4ms354 > div.css-b6s0n0 > div.css-11xuo59 > a.css-1o9os3o
RUNNING TIPS a.ee4ms354 > div.css-b6s0n0 > div.css-11xuo59 > a.css-1o9os3o
PRODUCT REVIEWS a.ee4ms354 > div.css-b6s0n0 > div.css-11xuo59 > a.css-1o9os3o

These items highlight common accessibility best practices.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
US nav.css-1pnlqgj > div.css-oprpp7 > div.css-fcw4so > button.ebcwvhg3
○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Buttons have an accessible name
●Image elements have `[alt]` attributes
●Form elements have associated labels
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●ARIA attributes are used as specified for the element's role
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links are distinguishable without relying on color.
●Links have a discernible name
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●Document has a main landmark.
●Deprecated ARIA roles were not used
●`<video>` elements contain a `<track>` element with `[kind="captions"]`
●Uses ARIA roles only on compatible elements
●Identical links have the same purpose.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
○`[role]`s are contained by their required parent element
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○ARIA IDs are unique
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Skip links are focusable.
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Image elements do not have `[alt]` attributes that are redundant text.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
100

Best Practices

●Uses HTTPS
●Avoids deprecated APIs
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No browser errors logged to the console
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
100

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●Document has a meta description
●Page has successful HTTP status code
●Links have descriptive text
●Links are crawlable
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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