Category benchmark · Snapshot 23 October 2026

Fitness & Health: website readiness

31 configuration checks across 613 Fitness & Health sites from the SID website catalog, with 222 individual profiles for sites in the Chrome UX Report top 50K.

Sites measured: 613
Median readiness index: 67/100
Profiles: 222
Weakest lane: Recover

Readiness by lane

Enable

82/100

All sites 77

Harden

59/100

All sites 56

Accelerate

63/100

All sites 64

Recover

10/100

All sites 10

Biggest gaps for Fitness & Health sites

The checks with the most room to improve, weighted by impact.

HSTS kept for at least a year
43% observed · all sites 34%
Send Strict-Transport-Security on HTTPS responses. Start with a short max-age (for example 300 seconds), confirm every subdomain works over HTTPS, then raise it in steps to 31536000. Add includeSubDomains only when all subdomains are HTTPS. HSTS preload is optional and hard to undo; hstspreload.org itself does not recommend it by default.
Guide: HTTPS and TLS Guide for Website Owners
security.txt published
7.3% observed · all sites 7.1%
Publish /.well-known/security.txt with at least Contact and Expires fields, as RFC 9116 requires, and review it before it expires.
Guide: A Practical Website Health Check for Owners
CAA records limit who can issue certificates
11% observed · all sites 13%
Publish CAA records naming every CA you actually use, including the CAs your CDN uses for managed certificates. Add an iodef contact if you want reports.
Guide: HTTPS and TLS Guide for Website Owners
DMARC policy enforces quarantine or reject
44% observed · all sites 39%
Publish DMARC with p=none and a reporting address first, fix any legitimate senders that fail SPF or DKIM alignment, then move to quarantine and finally reject.
Guide: A Practical Website Health Check for Owners
Modern image formats in use
45% observed · all sites 40%
Serve WebP or AVIF with a JPEG or PNG fallback, either through an image CDN or by generating both formats at build time.
Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format
HTTP/3 advertised
29% observed · all sites 37%
Turn on HTTP/3 at your CDN. Browsers fall back to HTTP/2 automatically, so the risk is low.
Guide: CDN Guide for Website Owners

Where Fitness & Health sites lead

robots.txt published89% observedall sites 76%
Canonical URL declared81% observedall sites 68%
Structured data present63% observedall sites 51%
Referrer-Policy set33% observedall sites 24%

Stack mix

CDN and edge

Platform or framework

DNS operator

Certificate authority

Readiness leaders

Fitness & Health sites in the top 50K with the highest share of observed practices (at least 26 of 31 checks measured). This lists only what we observed on 23 October 2026; owners can request a correction.

All 31 checks for Fitness & Health

Check	Lane	Observed	All sites	Measured
HTTP requests move to HTTPS	Harden	96%	91%	575
HSTS kept for at least a year	Harden	43%	34%	603
TLS 1.3 negotiated	Harden	89%	91%	609
Certificate has more than 14 days left	Harden	99%	99%	609
Certificate lifetime of 100 days or less	Harden	59%	67%	609
CAA records limit who can issue certificates	Harden	11%	13%	612
DNSSEC signed	Harden	9%	8%	613
security.txt published	Harden	7.3%	7.1%	599
DMARC policy enforces quarantine or reject	Harden	44%	39%	613
X-Content-Type-Options: nosniff	Harden	56%	48%	603
Framing restricted	Harden	58%	51%	603
Content Security Policy present	Harden	38%	32%	603
Referrer-Policy set	Harden	33%	24%	603
HTTP/2 negotiated	Accelerate	85%	90%	609
HTTP/3 advertised	Accelerate	29%	37%	603
HTML compressed	Accelerate	90%	93%	600
Static files cached for 30 days or more	Accelerate	56%	51%	547
Modern image formats in use	Accelerate	45%	40%	564
Offscreen images lazy-loaded	Accelerate	68%	62%	519
No render-blocking scripts in <head>	Accelerate	45%	48%	603
robots.txt published	Enable	89%	76%	603
XML sitemap discoverable	Enable	78%	70%	605
Reachable over IPv6	Enable	36%	48%	613
Canonical URL declared	Enable	81%	68%	603
Meta description written	Enable	88%	84%	603
Mobile viewport configured	Enable	99%	94%	603
Structured data present	Enable	63%	51%	603
Social preview image set	Enable	62%	57%	603
Page language declared	Enable	96%	90%	603
At most one redirect to the homepage	Enable	95%	98%	606
Nameservers spread across providers	Recover	9.9%	10%	608

Fitness & Health profiles

Readiness index shown next to each site.

Fitness & Health: website readiness

Readiness by lane

Biggest gaps for Fitness & Health sites

HSTS kept for at least a year

security.txt published

CAA records limit who can issue certificates

DMARC policy enforces quarantine or reject

Modern image formats in use

HTTP/3 advertised