How to Tell That You Are Not Recovering

Progress in sport happens not during training but between sessions. If recovery systematically fails to keep pace with the loads, results stall or decline, while the risk of injuries and illness grows. The problem is that the body sends its signals gradually, and they are easy to write off as a “bad day”. The editorial team has gathered the signs, tools and markers that help to spot under-recovery in time.

Fatigue as the norm and as a signal

Temporary fatigue after a hard training block is normal and even desirable. In sports science this is called functional overreaching: results drop for a few days but, after rest, reach a new level. Shock microcycles and training camps are built on this very principle.

The problem begins when performance does not return after ordinary rest. The ECSS and ACSM consensus (Meeusen et al., 2013) distinguishes non-functional overreaching, in which recovery takes weeks, and overtraining syndrome, which can drag on for months. The boundary between them is determined mainly retrospectively — by how much time it took to regain form.

Importantly, under-recovery is rarely linked to training alone. Sleep, nutrition, psychological stress, illness, travel — all of this is added to the overall “bill” of load. An athlete who trains on the same plan may suddenly stop recovering during an exam period or a spell of life troubles.

Energy deficit deserves separate mention. The IOC consensus on RED-S (2018) shows that a chronic shortage of energy relative to expenditure leads to hormonal, immune and bone disturbances, the symptoms of which are very similar to overtraining. That is why assessing nutrition is a mandatory step.

Subjective signs: what your well-being tells you

The most sensitive monitoring tool is often the athlete themselves. A systematic review by Saw and co-authors (2016) showed that subjective questionnaires (mood, fatigue, sleep quality, muscle soreness, stress) respond to changes in load more sensitively and consistently than most common biochemical and physiological indicators.

The most frequent early signs of under-recovery are a feeling of “heavy legs” already during the warm-up, an inability to handle the usual weights or pace, and a raised perceived difficulty of a standard workout. If the same work suddenly feels much harder, that is a warning signal.

• worsening sleep: hard to fall asleep despite fatigue, frequent awakenings, morning grogginess;
• reduced motivation and desire to train, apathy or irritability;
• prolonged muscle soreness that does not pass within 3–4 days;
• changes in appetite, unplanned weight loss;
• frequent colds, cold sores, slow healing of minor injuries;
• in women — menstrual cycle disturbances.

For these signals to work, they must be recorded regularly, not recalled only when things are already bad. A simple daily questionnaire of 4–6 items on a scale from 1 to 5 takes a minute. What matters is not the absolute numbers but the trend over 7–14 days compared with your usual norm.

The rating of perceived exertion (RPE) after each workout is also useful. Multiplying it by the session duration in minutes gives the so-called “session RPE” — a simple and validated way to count internal load and see when it rises sharply.

Objective indicators: pulse, HRV, tests

Resting morning pulse is the most accessible physiological marker. It is measured right after waking, lying down, under identical conditions. A steady increase of a few beats above your personal norm over several days may indicate incomplete recovery, the onset of illness or dehydration.

Heart rate variability is considered more informative. Plews and co-authors (2013) showed that in endurance athletes it is useful to look not at single measurements but at a 7-day rolling average and its fluctuations. A prolonged drop in HRV relative to your personal norm may point to under-recovery, although in some cases overload, on the contrary, is accompanied by an atypical rise in the metric.

Performance tests give a direct answer to the main question — whether the athlete is ready to work. This can be the height of a standing vertical jump, bar speed at a standard weight, time on a control segment or heart rate at a fixed power. A regular decline in the metric under stable conditions is a strong argument in favor of a deload.

Any objective indicator makes sense only relative to your personal baseline. Comparing your HRV or pulse with other people's values is pointless: individual differences are large.

Laboratory markers and their limits

Athletes often want to “get tested for overtraining”, but no such test exists. The Meeusen et al. consensus states directly: no single biochemical marker reliably diagnoses overtraining syndrome. The laboratory is useful primarily for ruling out other causes of fatigue.

Creatine kinase after a hard workout can rise several-fold, and this in itself does not mean poor recovery. It is useful for comparison with your own history and for detecting rare but dangerous conditions such as rhabdomyolysis.

Basic tests — a complete blood count, ferritin, thyroid function, vitamin D — are sensibly taken at the start of the season to establish a “baseline”. Then, if symptoms appear, the doctor will have something to compare against.

Any deviations in the tests should be interpreted by a doctor, not on your own. Anemia, hypothyroidism, infections, depression and the aftereffects of viral illnesses can masquerade as “overtraining” and require treatment, not just rest.

What to do if the signs accumulate

The first step is to reduce the load without waiting until things get really bad. A few days of light training or a short deload week are far more effective than a forced month-long pause. Often it is enough to cut volume by a third to a half while retaining part of the intensity.

The second step is an audit of basic factors. How many hours do you really sleep? Are there enough calories and carbohydrates for your work volume? Have stresses, flights or illnesses been added recently? Often the answer lies right here, not in the training plan.

The third is monitoring the trend. If after 1–2 weeks of reduced load, normal sleep and nutrition the metrics do not return to normal, that is a reason to see a sports physician for a full examination.

The fourth is prevention. Plan deloads in advance, build up volume gradually, keep a well-being diary. The recovery consensus by Kellmann and co-authors (2018) stresses that recovery should be just as planned a part of preparation as training itself.

Editorial conclusions

Under-recovery develops gradually, and it is seen earliest in well-being: worse sleep, loss of motivation, a rise in the perceived difficulty of usual workouts.

Morning pulse, HRV and simple performance tests help to confirm the problem, if you look at the trends relative to your own norm.

Laboratory tests do not diagnose overtraining, but they allow you to rule out anemia, thyroid problems and other causes of fatigue.

We also recommend reading our materials on stress and cortisol in the athlete, on DOMS and ways to reduce it, and on meditation and breathing practices.

References

1. Meeusen R, Duclos M, Foster C, et al. Prevention, diagnosis, and treatment of the overtraining syndrome: joint consensus statement of the ECSS and the ACSM. Med Sci Sports Exerc. 2013;45(1):186–205.
2. Saw AE, Main LC, Gastin PB. Monitoring the athlete training response: subjective self-reported measures trump commonly used objective measures: a systematic review. Br J Sports Med. 2016;50(5):281–291.
3. Halson SL. Monitoring training load to understand fatigue in athletes. Sports Med. 2014;44(Suppl 2):S139–S147.
4. Plews DJ, Laursen PB, Stanley J, et al. Training adaptation and heart rate variability in elite endurance athletes: opening the door to effective monitoring. Sports Med. 2013;43(9):773–781.
5. Kellmann M, Bertollo M, Bosquet L, et al. Recovery and performance in sport: consensus statement. Int J Sports Physiol Perform. 2018;13(2):240–245.
6. Mountjoy M, Sundgot-Borgen JK, Burke LM, et al. IOC consensus statement on relative energy deficiency in sport (RED-S): 2018 update. Br J Sports Med. 2018;52(11):687–697.