This is a fictional consultation scene created to aid understanding. It does not depict any real person or actual consultation.

Whenever we talk about exercise, the conversation always arrives at this point sooner or later. Right after someone says their back feels much better comes the question: "So I can stop exercising now, right?" The person asking usually looks pleased, like a student who just finished their homework. Saying "Not yet" to that face always feels a little unkind. But there's a clear reason.

If it doesn't hurt, isn't it over?

Pain is a lot like a fire alarm. Just because the alarm has stopped doesn't mean the spot where the fire started has been cleaned up.

While your back hurts, you naturally move less. You bend less, walk less, and avoid uncomfortable positions. When this goes on for a while, the strength and endurance of the muscles that support your trunk, and the range your joints move through, tend to decline. These changes often linger for some time even after the pain has settled.

So I look at "hurts less" and "works well again" separately. The yardstick is daily life: sitting for a long time, carrying groceries, climbing stairs. Whether you can do these without thinking about it is a much better sign of real recovery.

Once it's better, won't it stay away?

A 2018 series paper on low back pain in The Lancet puts it this way: most new episodes of low back pain improve quickly, but recurrences are common. The same paper also points out that low back pain is now the leading cause of disability worldwide.

So what reduces recurrence? A 2016 meta-analysis in JAMA Internal Medicine offers a good answer. It pooled 21 randomized controlled trials with 30,850 participants to compare prevention approaches. The results were fairly clear. Groups that combined exercise with education had about 0.55 times the risk of developing low back pain compared with control groups. Exercise alone came in at around 0.65 times, but that evidence was rated as low quality.

What's interesting is what didn't work. Education alone, back belts, and shoe insoles showed no confirmed preventive effect. Just knowing, or strapping something onto your body, wasn't enough. What made the difference was actually moving.

The Lancet paper on treatment and prevention (Foster et al.) explains that these studies mainly involved people who had already had low back pain. People whose pain has just eased are exactly that group.

So how much, and how?

The UK National Institute for Health and Care Excellence (NICE) guideline on low back pain (NG59) recommends encouraging people to continue their normal activities and considering an exercise program tailored to each person's needs and abilities. The guidelines from many countries summarized in the Lancet series share a similar message: don't just rest in bed, and keep up daily activities, including work. If pain persists, they recommend graded exercise aimed at improving function.

"Graded" is the key word. Start with what you can do today and build up very gradually. Once exercise becomes part of your daily routine, you need less willpower to keep it going.

If you're continuing on your own, sticking to the following is enough.

• Keep it simple with 2–3 movements. If a movement is new to you, start slowly and check your form in front of a mirror.
• Move only within a range that is pain-free or comfortable.
• Keep sessions short and frequent, such as 5–10 minutes, 2–3 times a day.
• Attach it to something you already do every day, like right after brushing your teeth or before leaving for work.
• When it gets easy, increase reps or time only a little. Don't jump to double at once.
• If pain after exercise lasts into the next day or gets worse, cut back. If it continues even after cutting back, get checked to find the cause.
• Make time for everyday activity such as walking. Taking one flight of stairs instead of the elevator counts too.

See a doctor first if…

• Difficulty passing urine or stool, or trouble controlling them
• Reduced sensation in the groin or inner buttocks (the saddle area)
• Leg weakness that keeps getting worse, or numbness that spreads
• Back pain along with fever or feeling generally unwell
• Unexplained weight loss, or a history of cancer treatment
• Pain that began after trauma such as a fall or an accident
• Pain that doesn't ease when lying down to rest and is worse at night

If you have even one of these symptoms, pause your exercises and see a doctor at a nearby medical facility first. Bladder or bowel changes and reduced sensation in the saddle area in particular need to be checked quickly. Whether imaging is needed is for the examining doctor to decide.

Tonight, after brushing your teeth, try just one comfortable movement for 5 minutes. Then do it again tomorrow at the same time.

This article is for general health information. Everyone's condition is different, so an accurate assessment requires consulting a professional.