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  • Connect Claude to RunVector Members only
  • What Your Heart Is Telling You Between Beats
  • Are You Fit or Just Tired? Understanding Training Load Metrics
  • Understanding Running Power Zones
  • Understanding Heart Rate Zones for Marathon Training
  • Lactate Threshold: The Key to Marathon Pace
  • VO2max: What It Is and Why It Matters
  • The Mileage Trap: How Fast Should You Build Running Volume?
  • Every Run Has a Purpose: The Workout Types That Build Marathon Fitness
  • Running Cadence: Finding Your Optimal Stride
  • Why Your Hilly Runs Are Better Than You Think
  • The Training Structure Behind Every Great Marathon
  • The Taper: How to Rest Your Way to a PR
  • Tempo Runs: The Comfortably Hard Workout
  • Understanding Training Blocks: The Science Behind Smarter Running
  • Boston Qualifying: Understanding BQ Times and Standards
  • How RunVector Predicts Your Marathon Time
  • Carb Loading for Marathon Runners: 3-Day Plan + Calculator
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Fundamentals

Understanding the science behind endurance performance

7 articles

Featured

Featured Article

Are You Fit or Just Tired? Understanding Training Load Metrics

Understand the fitness-fatigue model: how fitness, fatigue, and form are tracked, how the acute-to-chronic workload ratio (ACWR) flags injury risk, and how to use training load for smarter decisions.

training-loadfitness-fatigueacwrforminjury-prevention
12 min read
Updated 2/12/2026

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Membersmcpclaude

Connect Claude to RunVector

Connect Claude to your RunVector account in about a minute, so you can ask Claude about your training, races, and workouts.

2 min read
4/22/2026
hrvrecovery

What Your Heart Is Telling You Between Beats

Understand what HRV measures, how to interpret your trends, and how to use HRV data for smarter training decisions.

9 min read
2/14/2026
lactate-thresholdthreshold

Lactate Threshold: The Key to Marathon Pace

Understand what lactate threshold is, why it matters more than VO2max for marathon performance, and how to train to improve yours.

8 min read
1/23/2026
vo2maxaerobic-capacity

VO2max: What It Is and Why It Matters

Understand what VO2max measures, how it relates to marathon performance, and whether you can improve yours through training.

8 min read
1/23/2026