Can’t-Miss Workouts for a Half-Marathon PB

Why It Matters

Targeted tempo work boosts threshold endurance, translating into faster half‑marathon times without overtraining, a key advantage for competitive and recreational runners alike.

Key Takeaways

• Broken tempo splits half‑marathon pace into three 10‑minute intervals
• Long run finishes with 15‑minute half‑marathon effort
• One stamina session weekly balances intensity and recovery
• Coach Greg McMillan endorses single weekly tempo workout
• Include easy jog warm‑up and cool‑down to prevent injury

Pulse Analysis

Half‑marathon training often stalls when runners rely on generic mileage alone. Introducing specific tempo sessions—like the broken tempo routine—forces the body to operate at race‑pace intensity while still fresh, sharpening the neuromuscular patterns needed for a consistent effort. By segmenting the pace into three ten‑minute blocks, athletes can monitor heart‑rate zones, manage lactate buildup, and develop the mental discipline to hold a "comfortably hard" effort, a concept championed by legendary coach Jack Daniels.

The complementary long run with a fast finish tackles a different physiological challenge: late‑race fatigue. After 75 to 90 minutes of easy running, the final 15‑20 minutes at half‑marathon speed forces the muscles to recruit fast‑twitch fibers under tired conditions, improving glycogen sparing and aerobic efficiency. This workout mirrors the decisive stretch of a race when runners often lose form; practicing a controlled surge helps maintain stride economy and reduces the risk of hitting the proverbial wall.

Strategically, most coaches, including Greg McMillan, advise limiting high‑intensity stamina work to one session per week, paired with easy runs or rest days to promote recovery. This balance prevents overuse injuries while still delivering measurable performance gains. Runners should prioritize a thorough warm‑up, incorporate short pickups to activate the legs, and finish with a cool‑down to flush metabolites. By integrating these two workouts into a disciplined weekly plan, athletes can expect measurable improvements in threshold pace, ultimately translating to personal‑best half‑marathon finishes.