Time-Based Training Mistakes to Avoid

Training by time is one of the simplest ways to bring structure, balance, and consistency to your ultra-running. It removes ego from the equation, protects recovery, and helps you match the effort of your training to the effort of your race. But, like any good method, it has pitfalls.

Here are the most common mistakes ultra-runners make in time-based training, and how to avoid them.

1. Treating every hour the same

Not all hours are equal.

A two-hour run on rolling trails is very different from two hours on steep roads, boggy ground or technical singletrack. When you go by time, it’s easy to forget that terrain massively changes training load.

Fix: Note the terrain and stress of each run. A “hard” terrain day needs more recovery than a flat, easy one, even if the clock says the same thing.

2. Using time to justify running harder

Some runners subconsciously speed up when training by time:“If I run quicker, the session is over sooner” or “I’ll get more miles for the time if I go quicker”. 

This defeats the purpose. Training by time is meant to match stress, not make every run a test of pace.

Fix: Stick to effort, not outcome. If the goal is easy, it should feel easy throughout most of the run.

3. Letting the long run creep too long

When you’re not chasing miles, it’s easy to keep extending the long run “just to round things off.” Before you know it, the long run is 50% of your weekly volume and you’re limping into Tuesday.

Fix: Keep your long run at ~25-35% of weekly hours and only break that rule intentionally, not accidentally.

4. Forgetting to factor in life load

A four-hour long run on paper is fine. A four-hour long run after a heavy work week, poor sleep, travel, or high stress? Risky.

Time-based training requires awareness. Your body doesn’t just react to running stress, it responds to all stress.

“Be realistic about the time you have available to train and when, to help avoid over-committing,” says coach Anna Buckingham.

“If you know you have a school run, a 12 hour shift, a wedding, a family engagement etc. try and respect those commitments or you may quickly find yourself burning out.”

Communicate with your coach important dates that need navigating so this can be considered when tailoring your plan.

Remember that 99.9% of us are not pro athletes with unlimited time available so be gentle on yourself.

Fix: Anna feels it is key to “communicate with your coach important dates that need navigating so this can be considered when tailoring your plan. Remember that 99.9% of us are not pro athletes with unlimited time available so be gentle on yourself.”

5. Neglecting strength and mobility

When athletes make the switch to time-based running, they often forget that non-running training also costs time. If your week is built entirely around running hours, strength gets pushed out.

Fix:Allocate time for strength and mobility up front. 10-20 minutes a few days a week does more for injury prevention than chasing an extra 10-15 minutes of running.

6. Thinking time-based training means “less running”

Some people assume time-based training is a softer version of mileage. It’s not.It’s simply a more accurate measure of training stress. A three-hour hilly trail run might be more demanding than a 20-mile road effort, but only time reflects that.

Fix: Respect the load. Long sessions still need recovery.

In summary

Time-based training works beautifully, if you avoid the traps. Respect the terrain you’re running on, hold your long run in proportion, protect recovery, and build your week intentionally (or with a coach).

Done well, time-based training makes you more durable, takes into account you as an individual and leaves you far less prone to ego-driven overload.