Starting Out? It's Okay to Adjust, and It's Okay if Something Old Speaks Up

Over the last couple of weeks, I've had some conversations with people who are just getting started on new workout routines. The questions have a familiar ring. Is it normal to be this sore? Is it okay to lighten the weight? And, quietly, the one that seems to weigh on people the most: I used to have a problem with this spot, it went away, and now that I'm training it's back. Is this exercise wrong for me?

That last question deserves more than a quick reassurance, so let's take our time with it. But first, the bigger picture, because it's the same message running through all of it: the early weeks of training aren't a test. They're the part where you find out what you need, and you're allowed to adjust as you go.

Is it normal to feel sore when you start training?

Yes, and it usually eases faster than people expect. When your body meets a new kind of work, it's common to feel it a day or two later. A 2023 meta-analysis of 20 studies found that soreness was significantly lower the second time people did the same kind of exercise, a pattern researchers call the repeated bout effect. And in a large Cochrane overview of exercise for long-lasting pain, the most common side effect was increased soreness or muscle pain, which reportedly settled after a few weeks of continuing.

That doesn't mean you have to push through anything. It means a new feeling isn't automatically a bad one.

What if an old injury shows up when I start exercising?

Picture someone who hurt their back a few years ago. It was miserable for a while, then it settled. They went back to their normal life, stopped thinking about it, and, in their mind, it was fixed.

Then they start a new routine. A few weeks in, there it is again. Not necessarily terrible, but familiar, and unwelcome. And the thoughts come fast: I knew it. I shouldn't be doing this. Maybe I've undone my progress. Maybe I've damaged something.

I want to offer a different way to read that moment.

Being symptom-free in everyday life and being ready for training are two different things. Daily life asks a certain amount of your body. Training asks more. When an old spot speaks up as the demands go up, it's usually not telling you the exercise is wrong for you, and it doesn't usually mean you've caused new damage. It's showing you where that area is today compared to what you've asked of it. It often means there was something left unfinished the first time, because "doesn't hurt anymore" and "fully built back up" aren't the same finish line.

There's another piece that often gets missed. When pain has been around for a while, the nervous system can get a little touchy. Researchers describe pain that comes from a sensitized nervous system, not from fresh tissue damage. So a flare can mean your system is on high alert that day, not that something in your knee, back, or shoulder is broken. Hurt and harm aren't the same thing.

Should you stop when it flares up?

Usually, no. This is where it gets counterintuitive. Resting feels like the safe move, but avoiding activity tends to work against you. Current guidance for low back pain, for example, is to stay active and avoid prolonged rest, and for long-lasting pain more broadly, experts describe the goal as staying active despite the pain. A little discomfort when you restart is a small, short-term cost. Avoiding movement for good can leave you stiffer, weaker, and more worried about it.

Staying active doesn't mean doing the same thing at the same intensity. It means turning the dial.

How do you keep training when something flares?

Modify, don't quit. Lighter weight, fewer reps, a smaller range of motion, a different variation, or a gentler version of the same activity. Keep moving at a level you can manage. A large 2023 review in the British Journal of Sports Medicine found that every combination of load, sets, and weekly frequency they compared beat not training at all, so a scaled-down day is still a training day.

Use the acceptable soreness rule. Some discomfort during exercise is okay as long as it stays tolerable and settles by your next session. If it's manageable and fades, carry on as planned. If it stays high or lingers into the next day, ease the load next time.

Progress gradually. Flare-ups are most often triggered by doing too much, too soon. Build up slowly and steadily so you stay comfortable and keep improving.

Learn how pain works. Understanding that pain isn't a reliable alarm for damage helps. A meta-analysis of five trials found that combining pain education with exercise reduced pain, disability, fear of movement, and pain catastrophizing in the short term more than exercise alone. The certainty of the evidence was mostly low, but the direction is encouraging.

Set goals that matter to you. Track what you can do (climb the stairs, carry the groceries, play with your kids), not just a pain number. Focusing on function keeps you motivated when symptoms come and go.

Why does consistency matter more than intensity at the start?

Because the goal in the first months isn't a personal best. It's building something you can sustain, a routine that survives a busy week, a rough night of sleep, or a day when an old spot is grumbling.

The benefits of regular exercise, including better strength, movement, sleep, mood, and energy, tend to build over time, and they tend to last when training continues. A moderate session you repeat for months beats a heroic one you dread. And there's no single right exercise. For long-lasting low back pain, exercise of any type is a first-line recommendation, so walking, strength training, yoga, tai chi, or water-based exercise can all work. The best choice is the one you enjoy and will keep doing. If one program turned you off, switching to something you like is a smart move, not a failure.

What if everyone else in the room looks further along?

They are further along, in time. Everyone you're looking at started somewhere, with their own scaled movements and their own questions, and some of them with their own old injuries too. What you see is their middle. You're at your beginning. Both are fine. Take it one day at a time.

A realistic expectation

Exercise usually brings steady, meaningful improvement over weeks and months, not instant or complete relief. The research on exercise for long-lasting pain points to small-to-moderate benefits for pain and function, with few adverse events. Think of it as a habit that pays off over time, with the occasional flare along the way being a normal part of the journey, not a reason to stop.

When to check in with a professional

Reach out to your clinician or trainer if you have pain that is severe, sharp, or clearly different from your usual symptoms; pain following a fall or injury; swelling, redness, warmth, or a joint that locks or gives way; numbness, tingling, or weakness; or a flare that keeps getting worse over more than a couple of weeks even after you've backed off.

What This Means for You

It's okay to adjust. It's okay to feel something new. It's okay if something old speaks up, because that's often a sign there's more to build, not a sign that you're doing it wrong. Consistency matters more than intensity, and you don't have to figure it out alone.

If you're just getting started and any of this sounds familiar, whether it's soreness, an old injury, or just wondering how it's going, reach out. That's what coaching is for.

Sources

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Cashin AG, Chou R, Weimer MB, McAuley JH. Low back pain: a review. JAMA. 2026;336(2):144-158. doi:10.1001/jama.2026.9631 (PMID 42295944)

Cohen SP, Vase L, Hooten WM. Chronic pain: an update on burden, best practices, and new advances. Lancet. 2021;397(10289):2082-2097. doi:10.1016/S0140-6736(21)00393-7 (PMID 34062143)

Siddall B, Ram A, Jones MD, Booth J, Perriman D, Summers SJ. Short-term impact of combining pain neuroscience education with exercise for chronic musculoskeletal pain: a systematic review and meta-analysis. Pain. 2022;163(1):e20-e30. doi:10.1097/j.pain.0000000000002308 (PMID 33863860)

Doma K, Matoso B, Protzen G, Singh U, Boullosa D. The repeated bout effect of multiarticular exercises on muscle damage markers and physical performances: a systematic review and meta-analyses. J Strength Cond Res. 2023;37(12):2504-2515. doi:10.1519/JSC.0000000000004628 (PMID 38015738)

Currier BS, Mcleod JC, Banfield L, et al. Resistance training prescription for muscle strength and hypertrophy in healthy adults: a systematic review and Bayesian network meta-analysis. Br J Sports Med. 2023. doi:10.1136/bjsports-2023-106807 (PMID 37414459)