The Monday after a half marathon, descending stairs can cost more than you expect. On Tuesday, however, you might already feel like going for a run. Between one sensation and the next, the usual doubt arises: how many days should you rest? The answer depends on how you ran. If you tackled the 21.097 kilometers at full effort, started the distance, or finished with very heavy legs, you’ll need more margin than if you used the race as a controlled training run.
Day 1. Walk if it suits you and leave the running shoes at home
The day after competing, you can rest or take a short, calm walk. If walking feels comfortable, you can extend it a bit. If descending stairs requires more support than usual or you find yourself changing your gait to unload one leg, prioritize rest. Eat normally and try to ensure your meals include a source of carbohydrates, such as potatoes or bread, and another of protein, such as eggs, fish, or legumes. Hydrate throughout the day and give yourself enough time to sleep. If the race involved travel or you woke up earlier than usual, also take that fatigue into account when deciding how much to move around.
Day 2. Check how the soreness evolves
The second day is a good moment to compare sensations. Are you walking looser than yesterday? Can you go down stairs without altering your stance? A study with 38 recreational runners found that many measures of muscular strength recovered on day one, while some quadriceps measures took two days. Another small MRI-based study observed a faster recovery of several muscle indicators with rest than with moderate or intense running during the first three days. You can repeat the walk or try a few minutes of very light cycling if you feel like it and it’s comfortable. Skip routine speed work, hills, and heavy leg work. If you notice very localized pain, swelling, or a discomfort that forces you to limp, it’s wise to seek an evaluation before returning to running.
Days 3 and 4. Do a first short test if you’re moving normally
If you walk with ease, go down stairs without protecting either leg, and general discomfort has subsided, you can try a 15 to 25 minutes of easy jogging on flat ground. Choose a familiar route and maintain a pace at which you can speak in full sentences. If your legs feel heavy from the start or a pain appears that grows with time, finish by walking. Also monitor the response a few hours later and the next morning. If stiffness returns or the legs feel heavier than before you went out, take an extra rest day. If you feel the same or better, you already have a reference to decide your next training. After a debut or a particularly tough race, you may reserve this first jog for later.
Days 5 and 6. Resume the routine with easy runs
If you tolerated the first outing well, you can do another easy run of 25 to 40 minutes, with rest between sessions if needed. Adjust the duration to your usual training. For someone who normally runs three days a week, two short outings may be enough during this first week. Someone who trains more often may prefer to spread the return over several short runs. If you want to regain strength, start with familiar exercises and a load that leaves you some room. For example, you can do a brief session with fewer sets than usual and check how your legs respond the next day. Save heavy loads and jumps for when you’ve already completed several comfortable runs.
Day 7. Decide how to start the next week
The following weekend, a easy run of moderate duration can fit in if the previous outings went well. Before returning to your usual long run, observe how you have recovered from the jogs. If every session has felt more comfortable and the next day you can move normally, you can gradually increase the load. When you return to a quality session, first recover part of the work you used to do. If your usual training was six repetitions of a kilometer, you can start with four at a controlled pace. If by the seventh day you still feel weighed down after an easy run, give yourself a few more days. The date of your next race bib may guide your calendar, but the answer from your legs is what lets you decide when to push again.
