Negative Split Long Run
Workout - Negative Split Long Run
- 0.0mi @ 8'45''/mi
- 0.0mi @ 7'30''/mi
- 0.0mi @ 9'30''/mi
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Intro
The FOD Runner posted a solid workout recently—a 23 Mile NEGATIVE SPLIT Long Run (2:35 MARATHON PACE). We’ve broken down the structure below so you can run it. The full video has all the nuance.
Key Points
- Negative‑split long run: start easy, accelerate gradually toward marathon pace, then ease off slightly at the finish. Running the second half faster than the first is how you race smart—whether it’s a marathon, 10K, or 5K. Learn more in our Mastering the 10K: Proven Training Plans, Pace Strategies, and How a Smart App Can Elevate Your Performance.
- Pacing plan: 10–12 miles at a sustainable, easy clip; 8–10 miles at marathon goal pace (about 2:35 /mi); then an easy cooldown.
- Wind & weather strategy: pick sheltered routes when it’s blustery; adjust your effort rather than forcing the pace in tough conditions.
- Fueling tip: a hearty breakfast and mid-run caffeine/ketone helped sustain the runner through the marathon-pace miles.
- Heart‑rate awareness: during the hard stretch, heart rate averaged around 150 bpm—totally manageable for experienced distance runners.
Workout Example
- Warm‑up / Steady – 10–12 miles at an easy, conversational pace (around 6:40–6:45 /mi).
- Marathon‑pace block – 8–10 miles at your marathon target pace (roughly 2:35 /mi), each mile slightly quicker than the previous if conditions allow. This long, hard segment builds endurance and mental resilience simultaneously. Read more on how to structure these efforts in our Mastering Interval Training: Science-Backed Workouts and How a Smart App Can Personalize Them.
- Cool‑down – 2–3 easy miles (around 6:30–6:40 /mi) to reach the 23-mile total.
Match the distances and paces to your current fitness. Log runs in the Pacing app to track progress.
Closing Note
Run this negative-split workout and you’ll see whether marathon pace is sustainable over 23 miles. Customize the mileage and tempos to fit your calendar, track everything in the Pacing app, and keep the momentum going. Long runs build aerobic base, but speed work matters too—our Mastering 5K Speed: Proven Interval Strategies to Cut Minutes off Your Time covers workouts to maintain turnover.