Nov 2, 2026·14 min read
The Fastest Marathons in the Midwest, Ranked by the Numbers
The fastest marathons in the Midwest, ranked by hills, race-morning weather, and wind. See how Chicago, Indy Monumental, Grandma's, and 9 more score.
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Exercise Science & Real-Time Gear Data
Get nerdy about your next PR
Data-driven training guides, gear breakdowns, and free structured tools built for runners who care about getting faster. No paid product placements, no AI fluff.
Latest Insights
From the blog
Nov 2, 2026·11 min read
How Long Does It Take to Improve Your Half Marathon or Marathon Time?
How much can you realistically take off your half marathon or marathon in one training block? Here's what the research says about how experienced runners improve, plus the real numbers from my 19-minute marathon PR at 44.
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Nov 1, 2026·11 min read
How to Get Faster at Running: What the Research Actually Says
There's no single secret to running faster. Here are the six things research says actually make you faster, explained in plain English, plus what worked for me on the way to a 19-minute marathon PR at 44.
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Free Runner Tools
Built on exercise physiology, not generic templates.
Training Plan Generator
Personalized 5k, 10k, half marathon, and marathon plans calculated from your actual current race times. Includes structured cutback weeks and exports to PDF or Garmin FIT files.
Running Pace Calculator
Enter a recent race result to reveal your exact training zones—easy, tempo, interval, and marathon pace—along with equivalent race predictions from 5k to marathon.
Trending Gear & Deals
LiveReal-time bestsellers and price drops on running shoes, GPS watches, and recovery footwear updated every 12 hours.
Race Finder
Search upcoming marathons, half marathons, 10Ks, and 5Ks near you or filter by major US running cities. Powered directly by RunSignup data.
Structured Workouts
What our training plans look like
Week 8 of an 18-week marathon plan targeting a 3:30 finish time.
Week 8Build Phase
Intervals + marathon pace long run block
44 total miles
Mon
Aug 4
Easy7 miles @ 8:39–9:15/mi — aerobic base
Tue
Aug 5
Intervals8 miles w/ 7x800m @ 3:16/800m, 90-sec jog rest
Wed
Aug 6
Recovery5 miles @ 10:00/mi — easy leg flush
Thu
Aug 7
RestRest day — full recovery
Fri
Aug 8
Easy7 miles @ 8:39–9:15/mi + 4x20-sec strides
Sat
Aug 9
Long17 miles: 13 @ 9:15/mi + last 4 @ 7:52/mi MP
Sun
Aug 10
RestRest day — recovery
FAQ
Frequently Asked Questions
What is a Fitness Score?
Your Fitness Score is calculated from a recent race result and represents your current aerobic capability. It sets your personalized training paces for easy runs, tempo efforts, intervals, and long runs.
How are PR Nerd training plans different?
Most online plan generators use static templates based on arbitrary goal times. PR Nerd calculates training paces from your actual current fitness, ensuring you do not overtrain or run recovery days too fast.
Are the tools and articles completely free?
Yes, 100% free. No paywalls, no required account registration, and no premium upsells. We build open training tools and publish honest running research.
Can I export plans to my GPS watch?
Yes. All generated training plans can be downloaded as PDFs, Excel spreadsheets, or directly as Garmin/Coros compatible FIT files for your watch.
Ready to train smarter?
Explore our latest exercise physiology guides or calculate your personalized race pace targets today.