Race Pacing Strategy & Split Planner - Negative Split & Fueling Reminders
Avoid the dreaded marathon wall with scientifically calculated negative splits and automated energy gel nutrition reminders.
How to Use Race Pacing Strategist in 3 Simple Steps
Step 1: Upload
Drag & drop your .FIT, .GPX, or .TCX activity file. All processing is 100% private in your browser.
Step 2: Process
FitCrop inspects telemetry streams, removes anomalies, recalibrates metrics, or fixes binary checksums.
Step 3: Export
Download your clean Strava, Garmin, and Zwift compatible file with 1 click. Zero server wait.
Frequently Asked Questions
Why is a negative split the best running strategy?
Running the second half 1-3% faster conserves muscle glycogen during early miles and prevents severe cardiovascular drift, which causes the famous "marathon wall".
When should I take an energy gel during a marathon?
A proven fueling protocol is taking 1 energy gel with water every 6-8 km (approx. every 30-45 minutes), aiming for 40-60 grams of carbohydrates per hour.