Lane —Trackbuddy Field Notes
A 400m Training Plan That Respects the Event
2026-09-18 · 5 min read
The 400m is the sprint that punishes a training plan built for a different event. Train it like a 200m and the last 80m falls apart. Train it like an 800m and you never have the speed to run the first 200m relaxed. A useful 400m training plan is a negotiation between three qualities, and the weekly template below is one way to hold them in balance.
The three qualities
Speed. Your 200m time sets a ceiling on your 400m. Roughly, a well trained 400m runner passes 200m a second or so slower than their flat-out 200m. If your best 200m is 23.0, running 24.0 through the bell is sustainable; running 23.5 is borrowed time. Speed work is what raises the ceiling: short, fast, full recovery.
Speed endurance. Holding close to top speed for longer than the body wants to. This is the 150m to 300m range at 90 to 95 percent, with recoveries long enough that the next rep is still fast. It is where most of the 400m-specific adaptation happens.
Lactate tolerance (special endurance). Running through the part of the race where everything hurts and form wants to collapse. Reps of 300m to 500m at race effort, or broken 400s, with recoveries that are long by distance-runner standards and still not long enough to feel fresh.
Most plans get one of these right and neglect the other two. The order of neglect is usually speed first (it feels like it should be easy), then tolerance (it hurts). The result is an athlete who is fit and slow.
Weekly template (outdoor phase)
| Day | Session | Example |
|---|---|---|
| Mon | Speed endurance | 3×(150m + 150m) @ 95%, 30" between, 8' between sets |
| Tue | Strength + drills | Lifts, hurdle mobility, 6×30m block starts |
| Wed | Tempo / recovery | 8×200m @ 70%, 2' rest, on grass if you have it |
| Thu | Speed | 2×(3×60m) @ 98%, 3' / 8' rest; flying 30s |
| Fri | Rest or easy mobility | |
| Sat | Special endurance | 2×300m @ race effort, 15' rest; or 1×350m + 1×200m, 12' rest |
| Sun | Rest |
Three rules that matter more than the specific numbers:
- Speed comes before fatigue in the week. Thursday's 60s are useless if Wednesday was a hard day. Keep tempo genuinely easy: if the athlete cannot hold a conversation between 200s, it is not tempo, it is a second speed endurance session.
- Recoveries are part of the rep prescription.
3×300m @ 95%with 5' rest and with 15' rest are two different sessions training two different things. Write the rest down every time.6×150 @ 95% with 4' restis a session;6×150is not. - One tolerance session a week is plenty. Two, and the athlete arrives at Saturday's meet with legs that are still paying for Tuesday.
How the plan changes through the season
In the general preparation phase the same week has more volume and less intensity: the 150s become 8×150m at 85 percent, the 300s become 5×300m at 80 percent with 5' rest, and Thursday is hill sprints rather than flat speed. In the competition phase the volume drops hard and the intensity stays: 2×(150m + 150m) instead of three, one 300m at race effort with a full warm-down instead of two, and the speed day becomes a sharpening session of 4×60m and a couple of flying 30s. The season planning post covers the phase structure in more detail.
Splits worth knowing
For most athletes the fastest 400m has a differential (second 200m minus first 200m) somewhere between one and two seconds. A differential under a second usually means the first half was too slow; over three seconds usually means it was too fast. You cannot feel this in the race. You can only know it if someone takes a 200m split and it gets written down next to the finish time. Over a season those two numbers, split and differential, tell you more about what to train next than the finish time alone.
The same is true in training. A 300m at race effort where the 200m split is known is a diagnostic. A 300m where only the total is known is just a hard rep.
What to log
Every session above produces a small number of facts worth keeping: rep distances, times, rest, and for anything at 95 percent or above, the conditions (wind, surface, shoes). Feel matters too, but write it as a number or a word you will use consistently, not a paragraph. Six months later, the question you will be asking is "what did my 300s look like the month before I ran my PB?" and a log answers that only if the sessions were recorded the same way every week. How to set that up without it becoming a chore is in how to log track workouts; the structured logging in Trackbuddy is built around exactly these fields (logging).
Common mistakes
- Running every rep to the line at full effort. Speed endurance at 95 percent is a technical session. Straining past 95 percent teaches the body to run tight, which is the opposite of what the last 100m needs.
- Skipping tempo because it is boring. Tempo is where the aerobic floor that lets you recover between rounds at a championship gets built. It is boring on purpose.
- Testing with a time trial every week. A 400m time trial costs three or four days of training quality. Race instead, and treat the 300m and broken-400 sessions as your fitness read.
- Changing the plan after one bad session. One bad Saturday is weather, sleep, or life. Three in a row is a plan problem.
The event rewards patience and honest arithmetic. Build the ceiling, then build the ability to stay near it, then build the ability to suffer well when you inevitably cannot.