Marathon Training Speed Sessions: Structuring Weekly Workouts with Intervals, Tempo, and Rhythm Runs

Full Marathon Training Speed Sessions: Weekly Schedule for Intervals, Tempo, and Marathon-Pace Runs

Introduction

In full marathon training, “speed sessions” are the core of performance improvement, but they are also the most easily misused type of training. Many runners either skip speed work entirely (all easy runs) or go all-out every time (intervals every session). Both extremes lead to stagnation or injury.

This article details the definitions, purposes, and how to properly arrange the three main types of speed sessions within a full marathon weekly schedule.

Breakdown of the Three Speed Sessions

1. Lactate Threshold Tempo Run (Tempo Run / LT Run)

Definition: Run at lactate threshold pace (the fastest pace you can sustain for 45–60 minutes) for 20–40 minutes.

Purpose: Raise your lactate threshold, allowing you to clear lactate effectively at higher paces.

Pace Guidelines:

Sub-4 goal: approximately 5:10–5:20/km
Sub-3:30 goal: approximately 4:40–4:55/km

Feel: Breathing is heavy but sustainable; you cannot speak full sentences, but you can manage single words.

2. Interval Training

Definition: Multiple sets of short, high-intensity runs with jogging or walking recovery between sets.

Purpose: Improve VO₂max, increase maximal oxygen uptake, and make your goal pace feel easier.

Common Formats:

400m intervals: 6–12 reps, pace 4:20–4:40/km, 90 seconds jog recovery between reps
800m intervals: 5–8 reps, pace 4:25–4:45/km, 2 minutes jog recovery between reps
1000m intervals: 4–6 reps, pace 4:30–4:50/km, 3 minutes jog recovery between reps

3. Marathon-Pace Run (Race-Specific Tempo)

Definition: Run at your goal race pace for 6–16 km; this is the workout closest to race intensity.

Purpose: Acclimate the neuromuscular system to the movement patterns and metabolic demands of race pace.

Execution: Usually embedded within a long run, or performed as a standalone session.

Functional Comparison of the Three Session Types

Training Type	Primary Goal	Heart Rate Zone	Weekly Frequency	Suitable Phase
Tempo Run	Raise lactate threshold	82–87% MHR	Once per week	Throughout the plan
Interval Training	Improve VO₂max	88–95% MHR	Every other week	Strength-building phase
Marathon-Pace Run	Race-pace adaptation	78–84% MHR	Every other week	Mid-to-late phase

Weekly Schedule Example (Sub-4 Full Marathon, 65 km per week)

Standard Training Week:

Monday: Complete rest
Tuesday: Tempo Run 10 km (2 km warm-up + 6 km LT + 2 km cool-down)
Wednesday: Easy run 10 km
Thursday: 1000m intervals, 4–5 reps (12–14 km total including warm-up and cool-down)
Friday: Complete rest or easy 6 km
Saturday: Easy 8 km
Sunday: Long run 22–28 km

Interval Rotation Week (every other week):

Tuesday: Marathon-pace run 12 km (3 km warm-up + 8 km MP + 1 km cool-down)
Thursday: 800m intervals, 6 reps

Avoiding Common Mistakes

Speed sessions on consecutive days: Tuesday Tempo + Wednesday intervals is a wrong arrangement; you need at least 1–2 easy days between them.
Insufficient recovery before speed sessions: The day after a long run should not include intervals; schedule complete rest or an easy run instead.
Going too fast in speed sessions: Interval training is not sprinting; execute precisely at the prescribed pace. Going too fast fails to target the intended energy system.
Skipping the warm-up: Before every speed session, you need at least 10–15 minutes of easy running plus dynamic stretching.

Practical Tips

Record heart rate, pace, and perceived effort for every speed session to track training adaptation.
Choose flat routes for Tempo runs and intervals; hilly terrain hinders pace control.
Perform interval training on a track; municipal sports fields across Taiwan are generally open to runners.
Schedule the final speed session of the taper period 10–12 days before race day; afterward, only easy runs.

Conclusion

Intervals, Tempo runs, and Marathon-Pace runs are three sharp tools for improving full marathon performance—the key is “using the right weapon at the right time.” Weekly schedule design requires balancing training and recovery, giving enough easy days between quality sessions. Systematically arrange these three speed sessions, and you will feel the power of accumulated training on race day.