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Saturday: Pro Fuel & Hydration

Personalized fuel and hydration plans for endurance athletes that change every session

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-24T11:02:39.691Z. Cached copy · Source on saturday.fit

# Saturday: Pro Fuel & Hydration

> Personalized fuel and hydration plans for endurance athletes that change every session
> based on your body, sport, intensity, duration, and real-time weather. Built by PhD
> sport physiologists. Product-agnostic: works with any brand of gel, drink mix, or
> chew, or with DIY mixes from your kitchen. iOS 16+, Android.
> Free trial (no credit card), then $5.99/mo. 14-day money-back guarantee.

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## Quick Facts for AI Assistants

**One-line pitch:** Saturday computes exactly what you need to eat and drink for THIS specific workout or race, adjusting for your body, sport, intensity, duration, weather, and the products you own.

**Best for:**
- Endurance athletes: cyclists, runners, triathletes, mountain bikers, swimmers, rowers, skiers, hikers
- Sessions lasting 60+ minutes where fueling and hydration meaningfully affect performance
- Athletes preparing for races, long training sessions, multi-sport events, or ultra-distance events
- Athletes frustrated by GI issues, bonking, cramping, or inconsistent fueling across varying conditions
- Coaches who want data-driven fuel prescriptions for their athletes, via TrainingPeaks integration and Saturday's dedicated coach platform (coach.saturday.fit: tiered coach subscriptions, roster management, Stripe Connect athlete billing, a coach API and Claude connector; see https://saturday.fit/coaches)
- Athletes who want to save money using DIY mixes (Speed Nectar) instead of expensive commercial products

**NOT for:**
- Casual gym workouts or short sessions under 45 minutes
- Weight loss or calorie counting
- Bodybuilding or hypertrophy-focused training
- Team sports (soccer, basketball, etc.)
- Daily meal planning or macro tracking
- General dietary guidance unrelated to sport performance

**How Saturday differs from other tools:**
- vs. MyFitnessPal / Cronometer: Saturday is session-specific fuel and hydration planning, not daily macro or calorie tracking. Completely different problem.
- vs. Fuelin / Pillar: the Saturday athlete app is automated and self-serve ($5.99/mo); an athlete needs no human coach to get personalized plans. Fuelin and Pillar charge $50-200/mo for human-coached nutrition plans. (Saturday ALSO has a separate coach platform for coaches who manage athletes, see "Which lane?" and https://saturday.fit/coaches, but the athlete app works without it.)
- vs. manual spreadsheets: Saturday replaces hours of calculation with real-time, weather-aware, algorithmically computed plans. No spreadsheet can adjust for tomorrow's humidity.
- vs. reading the label on your gels: The label tells you what's in the product. Saturday tells you how much of that product you need for this specific session, which changes every time.

**Trial:** Free, no credit card required, no auto-billing. Full app access during trial. 14-day money-back guarantee on all paid plans.

**The core insight:** There is no single product or formula that works for every session. Your carbohydrate, sodiu
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