Reading Effort, Not Just Data

<!-- OPENER --> Trail Notes | Training Skills for the runner learning to listen Reading Effort, Not Just Data. Her Trails Coaching   Evidence-informed   Written for HER by HT   8 min read   <!-- LEAD --> Your watch can give you helpful information. But it cannot always tell the full story of what is happening inside your body. The deeper skill is learning to read yourself while you are moving. Learning to understand effort is one of the most important skills you can build as a trail runner. Pace, heart rate and data are useful tools. They help you notice patterns, track progress and understand how your body responds over time. But they are only part of the picture. The goal is not to ignore your watch. The goal is to combine the information from your watch with the information coming from your body. Data helps you observe. Body awareness helps you respond. Your watch tells you what happened. Your body tells you what to do next. <!-- SECTION 01 --> Trail Note  ·  01 Why pace is not always everything On road, pace can be a useful guide because the surface is usually more predictable. On trail, pace is constantly influenced by the environment. You may be working harder while moving slower, or moving faster while the internal effort stays low. This means a slower pace does not always mean you are less fit, and a faster pace does not always mean you are training better. The question is not only, “How fast am I going?” The better question is, “What is this effort costing me today?” What changes the cost of the same pace Climbs may slow your pace while increasing your breathing, heart rate and muscular load. Descents may feel easier aerobically but create more load through your quads, calves and feet. Technical terrain may require more focus, stability and coordination, even at a slower speed. Heat, humidity and altitude can make the same pace feel significantly harder. Fatigue, stress, poor sleep, hormones, illness or life load can all change how your body responds. Pack weight, shoes, nutrition and hydration can also influence your perceived effort. <!-- SECTION 02 --> Trail Note  ·  02 Learning to listen to your body Body listening is not about being vague or soft. It is a performance skill. It helps you make better decisions during training and racing. The more aware you become of your breathing, muscle fatigue, energy, mood, coordination and focus, the better you can adjust before a small issue becomes a bigger one. This is especially important on trail, where conditions change quickly and no two runs feel exactly the same. Over time, you are learning to notice When easy really feels easy. When you are drifting too hard too early. When your breathing is no longer matching the intended session. When your legs are carrying more fatigue than your heart rate suggests. When you need to hike, slow down, fuel, drink, cool down or adjust the plan. When you are capable of safely progressing the effort. The best athletes are not the ones who blindly follow data. They are the ones who can interpret data, listen to their body and make smart decisions in real time. <!-- SECTION 03 --> Trail Note  ·  03 Building your sense of effort, beyond the talk test The talk test is a great starting point. Can you hold a full conversation, a few words, or none at all? It quickly tells you roughly how hard you are working. But it is only one window into effort, and your sense of effort, your RPE, is a skill you build over time through pattern recognition. You develop it by paying attention to more than your breath. Notice how your legs feel, how quickly you recover after a climb, how steady your rhythm and coordination are, and how willing your mind is to keep going. The more you tune into these signals, the more accurately you can rate an effort without needing to talk, look at your watch or stop. One of the most useful habits is to rate the whole session shortly after you finish, while it is still fresh. This is sometimes called session RPE, and it captures internal load and fatigue that pace and heart rate can miss. Over weeks, you start to recognise what a true Level 3 feels like in your body, and what it feels like when fatigue, stress or heat have quietly raised the cost. Ways to calibrate effort beyond talking Rate the session 0 to 10 within about half an hour of finishing, before you forget how it felt. Notice how fast your breathing settles when the ground eases or flattens. Check leg heaviness, foot placement and coordination, not just your lungs. Run a familiar loop often and compare how the same effort feels week to week. Afterwards, check your number against your watch to see how well they agreed. Notice how you feel the next morning. Easy efforts should leave you ready to go again. <!-- SECTION 04 --> Trail Note  ·  04 How to use your watch well Your watch is most useful when it helps you learn, not when it controls every decision. Use it to observe trends, review sessions and understand your response to different terrain and training loads. During a run, use your watch as a check-in point. Look at heart rate, pace, elevation and time, but then compare that information with your breathing, effort, posture, muscle fatigue and energy. After a run, reflect on the full picture Did the effort match the session intention? Did your heart rate behave as expected? Did the terrain explain any pace changes? Did fatigue, stress, sleep, heat or hormones influence the session? Did you finish feeling how you were meant to feel? This is how you become a more intuitive, adaptable and resilient runner. You are not just collecting data. You are learning how to understand yourself. <!-- GUIDING PRINCIPLE --> Our guiding principle Effort first. RPE to calibrate. Heart rate to inform. Pace to observe. Body awareness to guide the decision. <!-- SIGN-OFF -->   run by feel, learn from the data <!-- AUTHORSHIP / CREDIBILITY --> Written by the Her Trails coaching team An evidence-informed coaching reference, written to support your understanding of effort and how to train by feel across your Her Trails program. Save it and return to it as your training develops. <!-- CTA --> Keep going with us Community Group Runs → Program Releases →