Most people who write down an injury start with the hit itself: when it happened, where, and how it felt. That is useful, but it leaves out one piece of information that helps anyone reading the entry later, including you. What could your body do normally before contact? A baseline gives the record something to compare against.
A baseline is a short description of your ordinary function on a day you were not hurt. It takes a few minutes to write and does not need to be exact. Think of it as a snapshot of how you move, not a test score.
What to write down before you need it
Pick a handful of everyday tasks that involve the body part most likely to be affected by your sport. A runner might note how the stairs at home feel, the pace of a normal walk, and how long they can stand at a kitchen counter. Someone who lifts might record the weight they use for a familiar exercise, how many clean reps they manage, and whether they can squat without pausing. A weekend soccer player might note how they sit down and stand up from a low chair, or whether they can change direction on the field without bracing.
Write each item as a plain sentence with a date beside it. For example: "Climbed the stairs at home carrying a laundry basket, no pausing, no hand on the rail, March 4." That level of detail is enough. Avoid words like "fine" or "normal" without describing the task, because those words mean different things to different people.
Keep the list short, five items at most. A long list is hard to update, and an out-of-date baseline is only a little better than none.
Using the baseline after a hit
When something happens, open the baseline and go through the same tasks in the same order. Record what you can do now, what changed, and how large the difference feels to you. Do this at a few points: the same day, the next morning, and again when you can repeat the tasks. Each comparison goes into the entry with its date and time.
The aim is not to name a cause. You are describing differences in plain terms. "Could not get out of a low chair without using both hands" tells a reader more than "hurts a lot," because it shows what the body is actually limited by. It also helps you notice whether the gap is closing, holding steady, or widening.
Be careful about reading too much into one good morning. Some people feel better on day two and then notice a sharp change when they try a fuller movement. Compare like with like. If your baseline included a full-speed stride, do not treat a slow walk around the block as proof that the full-speed stride has returned.
When the comparison points toward an exam
A baseline comparison is a reason to act, not a reason to wait. If your current tasks are clearly harder than your baseline, if something you could do before now needs help, or if the gap is not shrinking across the days you are tracking, consider booking an exam this week rather than waiting to see if it settles on its own. Bring the baseline list and the comparison entries. They give whoever examines you a clear before-and-after picture, which is often more useful than a general description of how things feel.
Urgent care, primary care, and sports medicine offices in the St. Louis metro can all ask the same kinds of questions. Note the name of anyone you see and the date of each visit so the record stays complete.
This article is general education, not a diagnosis, and it does not replace care from a qualified professional who has examined you. If you have sudden weakness, numbness, trouble breathing, or any symptom that feels severe, seek emergency care right away.