Studio - 22/05/2025
You worked hard on Tuesday, woke up on Wednesday feeling completely fine, and quietly wondered whether you had wasted your time. Plenty of people read that as a failed workout. It almost never is. Soreness tells you something was unfamiliar to your body, not that it was effective, and the two come apart more often than most people expect.
If you have been training consistently and the soreness has quietly stopped turning up, your body has adapted. That is the whole point of the exercise. Muscle responds to an unfamiliar demand by rebuilding to handle it better, and part of “better” is being less disrupted by the same work next time.
Exercise scientists call this the repeated bout effect, and it is one of the more reliable findings in the field. Do a workout your body has not met before and you will often be sore for a couple of days. Do that same workout again a week or two later and the soreness is dramatically reduced, sometimes almost absent, and the protection can last for weeks or months. Nothing about the second workout was easier. Your muscles simply handled it better.
So the absence of soreness is not the absence of a stimulus. It usually means one of three things: the work was familiar to your body, the intensity was well judged rather than reckless, or your recovery between classes is doing its job. All three are what a good training week is supposed to look like. The people who never feel sore are frequently the people who have been at it the longest.
The one case worth a second look is when nothing has changed for months, not the weight, not the reps, not the difficulty. That is not a soreness problem, it is a progression problem.
That dull, tender ache that shows up the day after a hard workout is Delayed Onset Muscle Soreness, usually shortened to DOMS. It tends to arrive 12 to 24 hours after you finish, rather than during the workout itself, which is exactly what makes it feel so mysterious.
Two things are worth being straight about. The first is that lactic acid does not cause it. That explanation has been repeated in gyms for decades and it does not hold up: lactate clears from your blood within roughly an hour of finishing, long before the soreness arrives. The second is that the exact mechanism is still not fully settled. What we can say confidently is that DOMS follows mechanical stress on muscle fibres and the connective tissue around them, particularly from eccentric work, the lengthening-under-load part of a movement like lowering a heavy weight or running downhill. The inflammatory and repair response that follows appears to sensitise the nerve endings in that tissue, which is why the area feels tender to press and stiff to move.
The popular “tiny tears that repair stronger” description is a rough simplification of that process rather than a lie, but it leads people somewhere unhelpful: if damage equals growth, then more damage must equal more growth. That is the part that does not follow.
Which leaves DOMS as mostly a novelty signal. A new movement, a new class, a bigger jump in load, a long gap since you last trained, perhaps while rebuilding after an illness: any of those can make a moderate workout hurt for two days, while a genuinely demanding one you do every week leaves nothing behind at all.
Yes. Muscle growth is driven mainly by mechanical tension, taking sets close enough to hard, doing enough of them, and gradually asking for more over time. Muscle damage is a side effect of unfamiliar training, not the thing that causes the adaptation.
The research points the same way. Studies comparing training that produces a lot of soreness with training that produces very little have generally found similar gains in muscle size and strength, and soreness has repeatedly turned out to be a poor proxy for how much a workout actually built. Some of the most effective training you will ever do is the boring, repeatable kind that leaves you feeling fine the next morning.
So track something that does not lie. Write down the weight and the reps. If your squat has gone from 8 reps to 11 at the same load, or the same 10 reps now feel controlled instead of desperate, that is growth in progress whether or not you limped down the stairs afterwards. Load, reps and quality of movement are the honest measures. Soreness is a feeling with a lot of noise in it, including how well you slept, how hydrated you are and how long it had been since you last trained. Being sore is not a problem in itself. It is just not the scoreboard.
Typical DOMS starts within about a day, peaks somewhere between 24 and 72 hours, and settles over the following few days. Most people are back to normal within three to five days, and after a genuinely unfamiliar workout it can stretch closer to a week. It should be a diffuse, muscular ache that is tender to press and eases as you warm up and move around.
Some soreness is worth a closer look rather than more patience. Book in with a physiotherapist if pain is still there beyond a week and is not clearly improving, if it is sharp, one-sided or sitting in a single spot rather than spread through the muscle, if it is in a joint rather than the muscle belly, or if there is swelling, bruising or a movement you simply cannot do. Ordinary soreness fades a bit each day. Pain that plateaus, or gets worse on day four, is telling a different story.
Rarely, severe soreness after a very hard or very unaccustomed workout comes with dark, tea-coloured urine, marked swelling and feeling generally unwell. That combination needs same-day medical care rather than a physio appointment. It is uncommon, but it is worth knowing.
A bit of soreness after something new is normal and harmless. Using it as the target is where things go sideways. If soreness is the goal, the only way to keep hitting it is to keep changing the workout or keep adding intensity, which means you are always doing something unfamiliar and never doing anything long enough to get good at it.
That has real costs. Training hard enough to be wrecked every time eats into recovery, and recovery is when the adaptation actually happens. It raises the odds of tendon and muscle irritation, because tissue takes longer to adapt to load than your enthusiasm does. And it makes consistency harder: a workout that leaves you unable to walk properly for three days is a workout you will start skipping. Effective training is about consistent progress, not soreness. The best week is rarely the most brutal one, it is the one you can repeat.
You are getting stronger or fitter. The clearest signal of all. You lift a little more weight, get a few more reps, hold a position longer, add repetitions to a simple benchmark like the single-leg calf raise test, or move through the same work with better control and less fighting for it. Those improvements mean your body is adapting, whether or not you feel anything the next day.
Your energy holds up. After a well-pitched workout you should feel worked but reasonably energised, not flattened. If you are dragging for the rest of the day, every time, the intensity is outrunning your recovery rather than building your fitness.
You recover well. Bouncing back within a day or two and being ready to train again is a sign the dose is right. Being too sore to move for days on end is a sign to pull the intensity back a notch, not proof that you earned it.
You are staying consistent. The most effective training is the training you keep doing. If your program lets you turn up two or three times a week for months, it is beating the heroic version you abandon in a fortnight. Consistency compounds in a way that single hard workouts never do.
Progressive overload. Gradually add weight, reps, range or control over weeks. Small, boring increases that you keep making will take you further than occasional workouts that flatten you, and they give you something concrete to look at when you want proof it is working. If keeping that record and judging when to add a little is the part that falls over, personal training hands that job to someone else.
Form and technique. Good technique protects you and makes the load land where you intended. A well-executed set at a moderate weight does more for the muscle you are trying to train than a heavier one where your back has taken over.
Variety, in sensible doses. Changing the stimulus every so often keeps different muscles and movement patterns involved and keeps you interested. Changing everything every week is how you stay permanently sore and permanently a beginner. Vary within a plan, not instead of one.
Soreness measures novelty, not effort.
If your strength, fitness and mobility are improving, you are on the right track, whether or not you feel it the next day. Consistency, proper form and progression are the true markers of a good workout.
That is also why our classes are physio-led. Strength is coached in small groups, so someone is watching your technique and nudging your load up when you are ready rather than leaving you to guess. And if something hurts in a way that ordinary soreness does not, our physiotherapists are in the same building, so you are not starting over with a stranger.
So next time you finish a class and you are not hobbling out the door, you have still done the work. Your body is still benefiting from it.
Book into a physio-led strength or Pilates class at Yarraville or Hampton East, or call and tell us what you have been training and what you want out of it. We will point you at the right class and the right starting load.
It is a sign that the workout was unfamiliar to your body, which is not the same as a sign that it was effective. A little soreness after new work is normal and harmless. It just is not a measure of how much you gained, and it should never be the target.
No, and for regular trainers it is expected. Once your body has adapted to a type of training it produces far less soreness for the same work, an effect exercise scientists call the repeated bout effect. Judge the workout on whether your load, reps and control are improving, not on how you feel the next morning.
Yes. Muscle growth is driven by mechanical tension, adequate volume and gradual progression over time, not by muscle damage. Studies comparing training that causes a lot of soreness with training that causes little have generally found similar gains in size and strength. Track the weight and the reps instead.
Usually because you have adapted to what you are doing, which is the training working. The soreness fades even though the work is unchanged. The one thing worth checking is whether the training itself has stopped moving. If the weight, the reps and the difficulty have been the same for months, add a little of one of them and see what happens.
It usually starts within about a day, peaks between 24 and 72 hours, and settles over the next few days. Three to five days is typical, and up to about a week after something genuinely unfamiliar. Soreness that lasts beyond a week without improving, or that is sharp and one-sided, is worth having assessed.
Usually yes, with sense. Gentle movement, walking and lighter work often help you feel better and are safe. What is not a good idea is loading the same sore muscles heavily again before they have settled. Train something else, drop the intensity, or take the day easy and come back when the ache has eased.
Ordinary soreness is a diffuse ache through the muscle that is tender to press, eases as you warm up, and fades a little each day. Pain that is sharp, one-sided, in a joint, or accompanied by swelling or a movement you cannot do is different, and so is pain that gets worse rather than better after day three. Those are worth a physiotherapy assessment.
Not lactic acid, despite how often that is repeated. Lactate clears from the blood within about an hour of finishing, long before the soreness arrives. DOMS follows mechanical stress on muscle fibres and the connective tissue around them, especially from eccentric or lengthening work, along with the inflammatory and repair response that follows. The full mechanism is still being worked out.
Studio - 22/05/2025
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