January usually invites people to build the “perfect” training plan — the one that looks incredible on paper but collapses the moment real life enters the room. Episode 4 of Endure Prime takes a different approach. Instead of chasing fantasy schedules and unrealistic expectations, we build something durable, flexible, and deeply effective: a training week that works for beginners, masters athletes, marathoners, speed-seekers, and anyone who just wants to feel good in their own body.

In this episode, we break down the two anchor workouts every athlete should have — the Zone-2 engine-builder and the controlled-intensity session — and show you exactly how they form the repeatable foundation for any goal. Then we zoom out into the long day, the easy-support day, and how to add third, fourth, fifth, and sixth training days without tipping into fatigue or chaos.

We also explore the iconic 4×4 interval, why Norwegian researchers Jan Helgerud and Jan Hoff made it famous, and how to execute it correctly whether you train by feel, heart rate, or lactate.

Whether you're building toward a race, rebuilding your fitness after a long break, or navigating midlife with a smarter lens on training load, Episode 4 shows you how to shape a week that holds up — not just in January, but all year.

This episode also includes a segment for masters athletes, plus the introduction of the Sub-20 Project, a long-term journey to running a sub-20-minute 5K at age 57+ — an honest, real-life case study in smart, sustainable training.

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