Many people believe that a useful session must leave them exhausted. Others are so worried about doing too much that they never apply enough effort to improve. Both problems come from treating every session as though it should feel the same.

Your body can usually handle more frequent activity when the demand changes across the week. Some sessions develop strength, speed or high-intensity capacity. Some build muscle or muscular endurance. Others practise movement, support recovery or simply keep you active.

What does RPE mean?

RPE means rate of perceived exertion. It is a rating of how hard an effort felt to you. The same load, pace or circuit can create a different internal demand for different people—or for the same person on different days.

Research supports session RPE as a practical way to monitor internal training load across different activities. It remains subjective: familiarity, exercise type, duration, instructions and the timing of the rating can affect the number. It becomes more useful when you record it consistently and keep it in context.

David’s TFR Traffic Light System

These bands are my coaching framework. They are not universal medical thresholds, an injury-prediction test or proof that a person is ready to train.

Low does not mean pointless

An easy run intended as recovery might sit around RPE 3 or 4. If the pace, hills, heat or duration push it beyond that, it has stopped being the same low-day session even though the activity is still running.

Moderate still creates progress

A warm-up set at RPE 6–7.5 prepares you for heavier work. A complete session averaging a similar effort might be the planned stimulus for that day. Moderate training is not failed high training; it has its own purpose.

High effort has a place

For a strength session, I commonly want the important working sets to reach roughly RPE 8–9 when that matches the programme. A true one-repetition maximum would feel like RPE 10. Sprint work also needs high intent; turning a sprint into a comfortable jog changes the stimulus.

RPE is not the whole answer

The same RPE can describe very different demands. One heavy repetition at RPE 9 is not the same as a long conditioning session rated RPE 9. Ten seconds of near-maximal sprinting is not the same as maintaining a hard aerobic effort for several minutes.

Plan the demand, record the reality

You can train frequently without training hard every day

A busy adult may be able to train or remain active on most days when high, moderate and low demands are balanced properly. That does not mean completing six punishing workouts every week.

A smaller amount of useful work repeated for months will usually build more than repeatedly exhausting yourself, losing momentum and needing long unplanned breaks.

A practical weekly example

This is an illustration, not a programme for every reader.

Final coaching takeaway

Leave your ego at the door and give every session a job. Train hard when hard work is the appropriate stimulus. Use moderate work to build useful capacity. Use low days and rest to protect the quality of the work that matters.