First Marathon Training: Beginner's Guide
How do you train for your first marathon safely? A beginner guide to 16-20 week plans, mileage buildup, long runs, tapering, and race day.
Read Guide →Running Guides
Evidence-based articles to help you train smarter, race faster, and enjoy every kilometer. Each guide links to free running calculators so you can put the knowledge into practice.
Training & Preparation
Half Marathon Training Plan: 12-Week Guide for Every Level
A 12-week half marathon plan built on the 80/20 rule. Covers long runs, threshold workouts, tapering, and a pacing strategy to prevent the second-half fade.
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Couch to 5K: The Complete 8-Week Beginner Plan
Never run before? This free 8-week walk-run plan takes you from zero to 5K with pacing guides, injury prevention, and a clear path to your first race.
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Running Pace Zones Explained: All 5 Zones, Easy to Sprint
What are running pace zones — and which should each run be in? Learn all 5 zones from easy to sprint, how to calculate yours, and when to use each.
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Running in Wind: How Headwind and Tailwind Change Pace
Headwind slows marathon pace about 2% per 5 m/s (Davies 1980). Tailwind helps less than you'd think. The physics, research, and tactics for windy runs.
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10K Training Guide: From 5K to Your First 10K
Ready to go from 5K to 10K? A 12-week plan with pacing progression, tempo runs, interval sessions, and race strategy for doubling your distance.
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Nutrition & Fueling
Marathon Nutrition: Science-Based Fueling Guide
What to eat before and during a marathon: carb loading protocol (8-10g/kg), race-day gel timing (60-90g/hr), gut training, GI prevention, and recovery nutrition.
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Runner's Diet Plan: Macros and Meals by Training Day
Plan your runner's diet with the right macros: 5-8g carbs and 1.4-1.8g protein per kg daily. Training vs rest-day meals, micronutrient targets, and vegan tips.
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Marathon Fueling Strategy — Gel Timing by Pace and Distance
How many gels for a marathon? 5-8 gels at 30-min intervals, 30-60g carbs/hour. Gel timing blueprints for sub-3 to 5-hour goals, plus gut training protocol.
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Runner Hydration: Sweat Rate, Electrolytes & Hyponatremia
How much water should runners drink? Drinking too much is more dangerous than dehydration. Test your sweat rate, time sodium, and avoid hyponatremia.
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Running for Fat Loss — Science-Backed Strategies
Why slow runs maximize fat oxidation, what Fatmax actually means for trained vs untrained runners, and a weekly protocol that beats EPOC and fasted hype.
Read Guide →Racing Strategy
How to Choose a Realistic Marathon Goal Time
How do you set a realistic marathon goal time? Use race predictors, training data, and honest self-assessment to find your ideal target.
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Run-Walk-Run Marathon Strategy — Ratios & Race Plan
The run-walk-run method averages 13 min faster marathons. Find your ratio by goal pace, start walk breaks from km 1, and prevent the late-race collapse.
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Race Day Preparation: Marathon Checklist
What should you do the morning of your marathon? Alarm timing, pre-race meal, gear checks, warm-up, and mental prep in one checklist.
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Boston Qualifying Times 2026: BQ Standards & Strategy
Can you qualify for Boston? 2026 BQ times by age and gender, the real cutoff buffer, fastest qualifying courses, and a training strategy to close the gap.
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Marathon Race Day Checklist: Hour-by-Hour Plan
Hour-by-hour from the night before to the finish: wake 3.5-4h pre-gun, breakfast timing, gel every 30-45 min, first-10K pacing, and heat/cold/rain gear plans.
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Hilly Marathon Training: 12-Week Boston, NYC & Big Sur Plan
Boston, NYC, Big Sur — a 12-week hilly marathon plan with uphill repeats, downhill eccentric work, course-specific pacing, and realistic goal-time adjustments.
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Heart Rate Training: Zones & Methods
How do you find the right heart rate zone for running? Zone calculation with the Karvonen method, HR monitor tips, and training applications.
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Average Marathon Time by Age & Gender (Free Chart)
Free chart of average marathon finish times by age and gender, plus what counts as a good time for your age — based on 430,000+ real US finishers.
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Half Marathon Time by Age & Gender — Where Do You Rank?
Half marathon medians by age and gender: men 1:59:48, women 2:24:03, overall 2:14:59. Top 10% is sub-1:47:10. Real 35M-result data, not a formula.
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5K Time Percentiles by Age & Gender — Where Do You Rank?
See your 5K percentile rank by age and gender: top 10% is sub-22:00, top 25% sub-25:30, median sub-30:00. By-age tables 18-24 to 70+ plus age grading.
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VO2max for Runners: Testing & Training
What does your VO2max mean for race day? Estimate it without a lab, discover the best interval workouts to raise it, and set realistic improvement targets.
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Butter Run Challenge: What It Is & How to Make Butter
The viral butter run turns 8–10 km of trail bounce into real, spreadable butter. Get the science, the ideal 10–13°C cream window, and a free calculator.
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Gear & Equipment
Carbon Plate Shoes: Are They Worth It for Slow Runners?
Are $280 carbon plate shoes worth it if you run 4:00 or 5:00 marathons? Hoogkamer 2018 vs 2026 271-runner meta-analysis (~2.75% mean) explained.
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Do You Need Stability Shoes for Overpronation? The Research
Most overpronators don't need stability shoes — 3 US Army RCTs, Nigg 2015, and Malisoux 2021 show foot-arch prescription rarely reduces injuries.
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How to Choose Marathon Running Shoes: A Complete Guide
Which running shoes match your pace and gait? Carbon plates vs. cushioned trainers, the 39% injury-reduction rotation strategy, and cost-per-km analysis.
Read Guide →Health & Recovery
Running in the Heat: Dew Point Guide, Safety & Performance
How hot is too hot to run? Dew point thresholds, acclimatization protocol, pace adjustment tables, heat illness signs, and free calculators for summer running.
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Common Running Injuries: Prevention & Recovery Guide
Why do 60% of running injuries stem from training errors? The 5 most common injuries, prevention exercises, the 10% rule, and when to see a doctor.
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Rest Days for Runners: Why Recovery Makes You Faster
Do rest days actually make you faster? Research shows 23% greater gains with structured recovery. Learn active vs passive rest and how to schedule rest days.
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Overtraining Syndrome: Signs, Prevention, and Recovery
Are you overtraining or just tired? Spot the warning signs of overtraining syndrome early with HRV monitoring and the 80/20 rule to protect your running.
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Sleep and Running: How Rest Drives Recovery and Performance
Sleeping under 7 hours raises injury risk by 70%. Sleep optimization strategies for runners: nap timing, training schedule tips, and pre-race insomnia facts.
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Return to Running: Comeback Plans After a Break
How long to regain running fitness after a break? Comeback plans for 2 weeks to 6 months off with detraining science, run-walk protocols, and pace expectations.
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City Running Guides
Discover the best running routes, race calendars, and local tips for cities around the world.
Shanghai, China
Best running routes in Shanghai: Bund waterfront, Century Park outer loop, Luwan Stadium night runs. Shanghai Marathon l...
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Tokyo, Japan
Where should you run in Tokyo? Explore the iconic Imperial Palace 5K loop, running stations with showers, riverside path...
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Berlin, Germany
Tiergarten loops, Tempelhof runway laps, Grunewald trails, and canal paths in the fastest marathon city. Two parkrun sit...
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London, UK
Hyde Park loops, Thames Path, 60+ parkrun sites, and Battersea Park track. London Marathon ballot tips, night-run safety...
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New York, USA
NYC running guide: Central Park 9.7K loop, Hudson Greenway 13mi, NYRR 9+1 path to the marathon, Armory winter intervals,...
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Boston, USA
Charles River Esplanade loops, Heartbreak Hill repeats, the BQ pipeline, and the 2027 Boston Marathon course — what to k...
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Osaka, Japan
Osaka Castle 3.5 km loop, Nagai Park marathon course, Yodo River 50+ km. Running Base showers, night safety tips, and Os...
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Running Calculators
98 free tools for pace, training, nutrition, and race planning.
Browse Tools →Marathon Directory
Countdown timers and race info for major marathons worldwide.
View Marathons →Our Methodology
How we validate our calculators using peer-reviewed sports science research.
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