When it comes to long-distance running, every element of your gear matters—especially your shoes. The Saucony Endorphin Speed has gained a loyal following among runners for its blend of speed, cushioning, and durability. But how well does it hold up when the miles start adding up?
In this article, we take a deep dive into the Saucony Endorphin Speed’s performance over long distances and whether it’s truly built for endurance running.
What Is the Saucony Endorphin Speed?
The Endorphin Speed is part of Saucony’s high-performance lineup, designed to be a versatile training and racing shoe. While its sibling, the Endorphin Pro, is geared toward race-day performance with a carbon plate, the Speed uses a nylon plate—a more forgiving and flexible alternative.
It’s best known for its PEBA-based PWRRUN PB foam, which offers lightweight cushioning and explosive energy return.
Key Features That Benefit Long-Distance Runners
1. Responsive Cushioning with PWRRUN PB Foam
One of the biggest strengths of the Endorphin Speed is its PEBA foam midsole, which rivals premium race-day shoes in softness and bounce. It provides consistent cushioning over long miles without feeling mushy or overly soft.
2. Nylon Plate for Propulsion
The full-length nylon plate embedded in the midsole gives a smooth rolling sensation, aiding in forward momentum. It mimics the performance of carbon-plated shoes but with more flexibility—ideal for extended efforts where comfort matters.
3. Lightweight Construction
Weighing in at around 8.1 oz (men’s size 9), the Endorphin Speed is impressively light for a daily trainer. Over marathon or ultramarathon distances, a lighter shoe reduces fatigue and improves running economy.
4. FORMFIT Upper for Comfort
The engineered mesh upper adapts to the foot and offers breathability and lockdown, essential during long-distance runs when feet swell and temperatures rise.
Real-World Performance in Long Runs
Excellent for Marathon Training
Many runners use the Endorphin Speed as their go-to shoe for marathon training. It shines on tempo runs, long runs, and even race day thanks to its responsive ride and durability.
Reliable Energy Return Over Time
Unlike softer foams that compress and flatten out over long runs, PWRRUN PB retains its bounce. Runners consistently report that the shoe feels springy even after 20+ miles.
Durability Over Distance
With 400–500 miles of average lifespan, the Endorphin Speed holds up well to the demands of long training blocks. The outsole rubber ensures good traction and wear resistance without adding unnecessary weight.
Potential Drawbacks for Long-Distance Runners
Not as Stable for Heel Strikers
The shoe’s rockered geometry and flexible plate benefit midfoot or forefoot strikers more than heel strikers, who might find it slightly unstable on longer runs.
Roomy Fit Might Not Suit Narrow Feet
While many appreciate the accommodating upper, runners with narrow feet may prefer a tighter midfoot lockdown for more technical or uneven terrain.
Ideal Use Cases for Long-Distance Runners
- Marathon training and racing
- Half-marathons and tempo runs
- Long progression runs
- Everyday training for experienced runners
Verdict: Is the Saucony Endorphin Speed Good for Long Distance?
Absolutely. The Saucony Endorphin Speed is one of the best long-distance running shoes for runners who want a shoe that blends comfort, speed, and durability. Its lightweight construction, responsive foam, and plated propulsion system make it suitable for everything from daily long runs to full marathons.
If you’re training for a half or full marathon and want a shoe that can handle high mileage while still making you feel fast, the Endorphin Speed is a top-tier choice worth every penny.
Pro Tip: If you’re rotating shoes, use the Endorphin Speed for long tempos and races, and pair it with a more cushioned trainer (like the Saucony Triumph) for easy recovery days.
