Most marathoners show up on race day hoping for the best—but this workout reveals the truth about your fitness long before you toe the line.

What if you could predict your marathon outcome before race day without guesswork or hoping your long runs were enough? In this episode, I walk you through a powerful workout almost nobody is using—but should be. It’s a next-level tweak to a popular track session that not only tests your fitness but strengthens the exact muscles and mindset needed to stay strong in those brutal final miles. I’ll break down what it is, why it works, how to do it, and when to add it to your training block. Whether you're a new runner or a sub-3 marathoner, this session might just be the missing piece to smarter, more confident race prep.

Key Takeaways

1. The Rosario 800s are a smart way to test your marathon fitness by combining fast and slower 800-meter intervals without rest, showing if your race goal is realistic.
2. This workout helps build endurance and mental strength by keeping your heart rate steady just below your threshold, which is great for race day stamina.
3. You can adjust Rosario 800s for different race distances and experience levels, making it a flexible tool that complements other workouts like tempo runs and long runs.

Timestamps

• [00:00] Do this workout for gains
• [00:29] What you will learn and use
• [00:54] Why you should trust me
• [01:19] What exactly are the Rosario 800s?
• [04:10] How to do Rosario 800s
• [06:13] Get your free sub-threshold training plan
• [06:51] Why this workout matters so much for distance runners
• [08:14] How to modify Rosario 800s for other distances
• [09:13] Finish line closing thoughts

Links & Learnings

• 📈 Get your free 1% better base and habits training plan now - https://dlakecreates.com/subthresholdfree
• 🎧 Listen, read and learn more here https://dlakecreates.com/rosario800s
• More about Sub Threshold Running - https://dlakecreates.com/sub-threshold-running/
• What is Tempo Running - https://dlakecreates.com/tempo
• DLake Runs on IG - https://instagram.com/dlakecreates
• DLake Runs on Strava - https://www.strava.com/athletes/120507

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