Marathon Recovery Plan: 4 Weeks, Day by Day

Keep moving, get warm, and get carbohydrate and protein in within the first hour. Walk for ten to fifteen minutes after crossing the line rather than sitting straight down — gentle movement helps clear the by-products of the race far better than collapsing on the grass. Change into warm, dry clothes quickly, since temperature regulation is impaired after prolonged effort, and eat something with both carbohydrate and protein within 30 to 60 minutes even if your appetite has vanished.

Delayed onset muscle soreness typically peaks 24 to 48 hours after the race and settles over three to five days. Quads take the biggest eccentric battering of any muscle group over 26.2 miles, especially on a course with downhill sections, so stairs are usually the worst of it on days one and two.

Yes. Post-marathon is exactly the scenario cold water immersion is well supported for. The caveat sometimes raised about ice baths blunting muscle adaptation applies to strength training, not to this — after a marathon you are managing acute muscle damage and swelling, not chasing a training adaptation. A guided plunge at 4–7°C for two to four minutes in the first day or two reduces perceived soreness and helps you get back to comfortable movement sooner.

Most runners need three to four weeks before returning to normal training, with no running at all in the first week. Feeling fine by Thursday is not the same as the muscle fibres, tendons and immune system being fully repaired — the deeper damage outlasts the soreness by a wide margin.

No running for at least the first week, easy running only in weeks two and three, and no hard sessions or racing for at least three weeks. If your race took over four hours, err longer. Week two should be two or three short, genuinely easy runs; week three builds back towards half your normal mileage; week four is when a faster session can return, if everything still feels normal.

Halve everything, roughly. After a hard half marathon, expect two to three days of soreness, three to five days off running, and one to two weeks of easy running before full training resumes. The same principles apply: move lightly rather than resting completely, use cold water immersion in the first couple of days, and book a massage once the acute tenderness has settled.

Normal post-marathon soreness is symmetrical, dull, worst on days one and two, and steadily improving. Pain that is sharp, one-sided, or still worsening two weeks after the race deserves a proper assessment — particularly pain in one specific spot on a bone, a calf or hamstring that grabbed during the race and hasn't loosened, knee pain that flares only on jogging, or swelling that persists past the first week.