What you’ll find here
The 26weeks.ai blog is a coaching library for endurance athletes—built to answer practical questions like “what should I do next?” without a 50‑option spreadsheet. You’ll find training hubs (marathon, half marathon, triathlon, ultra, HYROX), race resources, and tools that turn decisions into numbers (paces, race‑time estimates, fueling totals, cutoff planning). Many guides use checklists, decision rules, and a sources section so you can verify claims and learn faster. This content is general training information, not medical advice; if you’re injured or have symptoms that worsen with training load, consult a qualified professional. For race logistics, always confirm details with official race organizers.
Start here
The training library
Pick a hub, run the numbers, then follow one checklist. This blog is built to reduce decision fatigue — not create it.
Training hubs
OpenPick one plan
Plans with smart variations inside the page — so you commit to a default and stop tab-hopping.
Tools
OpenRehearse the numbers
Pace, fueling, cutoffs, predictors — built to prevent race-week blow-ups.
Races
OpenUse verified race guides
Fact-based directories with sources and last-verified timestamps — because stale logistics ruin race week.
Guides
OpenFollow one checklist
Decision rules for pacing, tapering, recovery, and plan selection — written for busy runners.
Hubs
Training hubs & athlete guides
Hubs are built to answer: “what do I do next?” without a 50-option grid.
Marathon Training Plan Hub (Free Plans + Tools)
Marathon training plans, tools, and guides — built to reduce decision fatigue, keep you consistent, and help you pick a plan you can actually execute.
Half Marathon Training Hub
Half marathon training plans, pacing tools, and guides — structured to reduce overwhelm and keep training simple.
HYROX Training Plan Hub (Plans + Tools)
HYROX training plans, tools, and checklists — structured to balance running + stations without weekly maximal efforts.
Ironman 70.3 Training Hub
70.3 training plans, fueling tools, and execution checklists — focused on pacing and repeatable weeks.
Ironman Training Hub
Ironman training plans, fueling tools, and execution checklists — designed to manage fatigue and sustain volume.
Ultra Training Plan Hub (Plans + Tools)
Ultra training plans, cutoff planning tools, and decision rules — focused on time-on-feet and durability.
Marathon Races (Directory + Athlete Guides)
Curated marathon race directory with athlete guides. Facts include sources, verification timestamps, and planning tools.
Performance Science Lab
Research-backed protocols and evidence grades for endurance performance — built for athletes.
Start reading
Highlighted reads
The fastest way to get value: read one guide, then move into the hub or tool it links to.
Marathon Training Injury Guide: Avoid Common & Rare Setbacks
From runner’s knee to stress fractures, learn how to dodge the injuries that derail Marathon Training—plus science-backed strategies to keep you running strong all season long.
Marathon Training: 12 Life-Changing Reasons to Run 26.2
Thinking about taking on 42.2 km? Discover the surprising physical, mental, and social benefits of marathon training—plus expert-backed tips to get you from curiosity to the starting line.
All posts
43 article(s)
12-Week Marathon Training Plan for Busy Runners: A Practical, Adaptive Build
A safety-first 12-week marathon training plan for busy runners who need clear defaults, realistic weekly structure, and adaptation rules when life interrupts training.
Zone 2 Running Calculator + Talk Test: A Practical Marathon Training Guide
Use heart rate, pace, and the talk test together to set a practical Zone 2 range, avoid accidental hard days, and keep marathon training consistent.
Running Weight Loss During Marathon Training: How to Avoid the Energy Crash
A practical, safety-first guide to losing weight during marathon training without wrecking long-run quality, recovery, or mood.
Runner's Knee Before a Marathon: Race or Defer? A Safety-First Checklist
A practical decision checklist for runner's knee in taper weeks so you can protect long-term consistency while making a clear race-day call.
Overreaching vs Overtraining in Running: How to Tell and What to Do Next
A practical checklist to separate normal heavy-training fatigue from overtraining risk, with recovery actions and red-flag guidance for runners.
Marathon Training Schedule: 3 Days a Week That Still Builds Real Endurance
A practical 16-week marathon training schedule for runners limited to three run days per week, with clear adjustment rules, strength add-ons, and safety checkpoints.
Marathon Training Plan PDF: A Safety-First Template With Adaptation Rules
Use this printable marathon training plan PDF framework to keep training consistent, adapt safely when life interrupts, and reduce race-week decision fatigue.
Marathon Training Near Me: Coach vs Run Club vs App (Practical Checklist)
Use this decision checklist to choose local coaching, run clubs, or app-based marathon training based on schedule, safety needs, and support style.
Marathon Training After Illness: A Safe Return-to-Run Checklist
A practical step-down and step-back plan for runners returning after cold, flu, or viral illness, with red-flag guidance and recovery safeguards.
Marathon Fueling Strategy: The 30-60-90g Carb Plan You Can Actually Practice
A practical marathon fueling progression with checklists for long runs, race day, and GI troubleshooting so you can fuel without guesswork.
Leg Strength Training for Runners: A Simple 2-Day Gym Plan for Speed and Injury Resilience
A practical gym strength plan for runners with weekly structure, progression rules, and recovery guardrails that support marathon training.
How to Recover From Overtraining in Running: A 14-Day Reset Without Losing the Plot
A practical 14-day overtraining recovery reset for runners: what to pause, what to keep, and how to return safely without panic training.
How Many Gels for a Marathon? A Finish-Time Calculator and Race-Day Checklist
A practical, safety-first way to estimate marathon gel count by finish time, carb target, and aid-station reality so you can fuel without panic.
6-Month Half Marathon Training Plan for First-Timers (Low-Drama, High-Consistency)
A practical 24-week half-marathon plan for first-timers who want steady progress, injury-prevention guardrails, and simple adaptation rules when life interrupts training.
How to Avoid Overtraining in Marathon Training: A Weekly Checklist That Works
A practical weekly system to prevent overtraining with load, recovery, fueling, and mental stress checks you can run in 10 minutes.
8-Week Half Marathon Training Plan for Busy Runners: A Safety-First Build
A practical 8-week half-marathon plan with clear adaptation rules, injury-prevention guardrails, and race-week execution checklists for busy schedules.
Marathon Training Sleep Quality and Injury Risk: A Practical Weekly Checklist
How sleep quality affects marathon injury risk, plus a practical checklist to adjust training load before small issues become layoffs.
Zone 2 Running: Heart Rate vs Pace for Marathon Training (And What to Do on Bad Days)
A practical decision guide for using heart rate and pace in Zone 2 marathon training, with checklists for heat, hills, treadmill runs, and recovery flags.
10-Week Half Marathon Training Plan for Busy Runners: A Practical, Adaptive Build
A safety-first 10-week half marathon plan for busy schedules, with clear session defaults, adaptation rules, and recovery guardrails.
Sub-3-Hour Marathon Training: Benchmark Checklist Before You Commit
A practical benchmark checklist for runners targeting a sub-3 marathon, with pacing, fueling, durability, and recovery gates.
14-Week Marathon Training Plan for Busy Runners: A Practical Weekly Blueprint
A realistic 14-week marathon plan for runners balancing work, family, and recovery, with clear weekly structure, fueling checkpoints, and safety gates.
5K to Half Marathon Training Plan for Busy Runners: A Practical 12-Week Build
A realistic 12-week 5K-to-half-marathon training plan with weekly checklists, recovery guardrails, and adaptation rules when life disrupts training.
Post Half Marathon Recovery Plan: A Practical 7-Day Reset
A day-by-day half-marathon recovery plan covering soreness, fueling, sleep, and safe return-to-run decisions.
Overtraining vs Underfueling: A Runner's Signs-and-Action Checklist
How to tell whether performance drop is from training load, low energy intake, or both, with a practical decision checklist.
Marathon Training Shoes Rotation: A Simple Guide for Durability and Fewer Niggles
How to build a practical marathon shoe rotation that supports consistency, recovery, and lower injury risk without overcomplicating decisions.
Best Treadmill for Marathon Training: A Practical Checklist Before You Buy
How to choose a treadmill for marathon training based on durability, deck feel, motor stability, and real-world constraints so your easy and long runs stay consistent.
Half Marathon to Marathon Training Plan (16 Weeks): Transition Without Burnout
A 16-week transition plan from half marathon fitness to marathon readiness, with weekly priorities, fueling practice, and injury-risk guardrails.
Marathon Hip and Achilles Injury Prevention: A Strength and Screening Checklist
Use this practical checklist to catch hip and Achilles red flags early, adjust training, and stay durable through a marathon build.
Marathon Taper Anxiety and Sleep: A 7-Day Checklist That Protects Race Week
A calm, practical taper-week plan to reduce anxiety, protect sleep, and keep race-day decisions simple.
Marathon Training Burnout: A Practical Reset for Mental Fatigue
If marathon training starts feeling like another stressor, use this practical reset to protect mental health, keep fitness, and make better race decisions.
9-Week Half Marathon Training Plan for Busy Runners (With Recovery and Strength Built In)
A realistic 9-week half-marathon structure for busy runners who want consistency, lower injury risk, and clear week-by-week decisions.
Missed a Long Run Before Your Marathon? What to Do in the Last 2 Weeks
A calm, practical plan for runners who missed key long runs near race day and want to finish safely without panic training.
Marathon Recovery Timeline: A Practical 14-Day Checklist
A day-by-day post-marathon recovery plan with sleep, fueling, movement, and red-flag guidance so you can return to training safely.
Signs of Overtraining in Running: A 7-Day Reset Before It Becomes Injury
How to spot early overtraining signals, run a practical 7-day reset, and return to training without losing momentum.
Strength Training for Runners at Home: A 2-Day Plan That Supports Marathon Builds
A practical at-home strength plan for runners with minimal equipment, clear exercise progressions, and injury-prevention guardrails.
Marathon Fueling for a Sensitive Stomach: A Practical Checklist That Still Powers Your Race
How to fuel long runs and race day when gels upset your stomach, with a step-by-step testing protocol and safety guardrails.
HRV vs Resting Heart Rate for Marathon Training: What to Trust Each Morning
Use HRV and resting heart rate together to decide when to push, hold, or back off in marathon training.
VO2 Max 101: Elevate Endurance with Proven Strategies
A complete, science-backed guide on VO2 Max for runners and endurance athletes—definitions, tests, training tips, and an 8-week plan to boost your aerobic engine.
Marathon Training Breathwork: Pranayama to Boost HRV & VO2
Unlock better heart-rate variability, a lower resting pulse, and more oxygen per stride with science-backed breathing drills tailor-made for every runner.
Sleep: The Missing Piece in Marathon Training
Most runners obsess over mileage, pace, and nutrition—but ignore the recovery powerhouse that happens when the lights go out. Discover how mastering sleep can unlock faster times, stronger muscles, and a happier training cycle.
Marathon Training: Strength Work That Powers Every Mile
Discover why strength workouts are the secret weapon for runners of all levels and learn exactly how to weave them into your marathon plan—without burning out.
Marathon Training Injury Guide: Avoid Common & Rare Setbacks
From runner’s knee to stress fractures, learn how to dodge the injuries that derail Marathon Training—plus science-backed strategies to keep you running strong all season long.
Marathon Training: 12 Life-Changing Reasons to Run 26.2
Thinking about taking on 42.2 km? Discover the surprising physical, mental, and social benefits of marathon training—plus expert-backed tips to get you from curiosity to the starting line.
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