How to Start Working Out Again After a Long Break (After 40)
Start with less than you think you need. For the first two weeks, walk most days and do two short strength sessions, then move up to three in weeks 3 and 4. The first month should feel too easy, because its job is to rebuild the habit and let your joints catch up. Strength comes back faster than it took to build, so there's no prize for rushing.
Why the first month should feel too easy
The comeback that sticks is the boring one. Most comebacks end not with an injury but with soreness that makes the next session easy to skip.
- Showing up is the goal. Finish every session feeling you could have done more.
- Leave reps in the tank. In weeks 1 and 2, stop every set with 3 or 4 good reps left. In weeks 3 and 4, about 2.
- Keep the menu short. A squat, a hinge, a push, a pull and a carry.
This season's most popular ways back in all fit around that. Japanese walking (walking intervals) was the fastest growing fitness search in PureGym's 2026 report, Pilates has been ClassPass's most booked class three years running, and strength training made ACSM's 2026 trends list, which notes fewer than 30% of US adults meet the strength guideline. Walking intervals, Pilates and mobility work all slot in around a simple 3 day strength plan.
Muscle memory: why strength comes back faster
In a 2024 study from the University of Jyväskylä in Finland, adults new to lifting trained for 20 weeks, and one group took a 10 week break in the middle. During the break they lost muscle size and some strength. After about five weeks back, they were where they had been before the break, and by the end both groups had similar results.
The people in that study were young, so it isn't proof of what happens after 40. But it matches what most returning lifters notice: strength comes back faster than it took to build. The catch is that your tendons and joints don't know you used to lift. Give them the month.
How to start if you're coming back: a 4 week plan
| Week | Walking | Strength | How hard |
|---|---|---|---|
| 1 | 20 to 30 minutes, 3 or 4 days | 2 sessions, 2 sets per exercise | Easy: 3 or 4 reps left in every set |
| 2 | 25 to 30 minutes, 4 days | 2 sessions, 2 sets per exercise | Easy: 3 reps left |
| 3 | 30 minutes, 3 or 4 days | 3 sessions, 2 to 3 sets | Moderate: 2 or 3 reps left |
| 4 | 30 minutes, 4 days | 3 sessions, 3 sets | Moderate: about 2 reps left |
Put two days between your strength sessions in weeks 1 and 2 (Monday and Thursday works). Pick weights you could lift 15 times, and do sets of 10. Walk at a pace where you can talk but not sing. By the end of week 4 you're close to the CDC guideline of 150 minutes of moderate activity and at least 2 days of strength work a week. The 3 day full body workout is the plan to grow into.
Soreness (DOMS) and how to keep it mild
Delayed onset muscle soreness, or DOMS, is the stiff, achy feeling that shows up the day after a new or harder session. It comes mostly from unfamiliar work. Some is normal. A lot means you did too much, too soon.
- Do fewer sets than you think. Two per exercise for the first two weeks.
- Repeat the same moves. Soreness drops once your body has seen an exercise a few times.
- Change one thing at a time. More weight or a new exercise, not both in the same week.
Stiffness that eases as you warm up is fine. Sharp pain, or pain in a joint rather than a muscle, is a reason to stop and get checked.
How to know you're ready to add more
Add more when, for two weeks running:
- You did every session you planned.
- Soreness is gone within a day.
- Your last set feels like it had 3 or more reps left.
- Your joints feel the same or better the next morning.
Then add one thing: a set, a day, or a little weight. Reps first, then weight, which is how Liftspan moves you up too.
What to do when you miss a week
You will miss one. It's not the end of the comeback.
- Don't make it up. Pick up with the next session in the plan.
- Go a little lighter for one session, then carry on.
- Keep walking. The daily habit is harder to restart than the strength is.
In Liftspan, a missed week isn't owed back and your weights hold where you left them. More on that in the guide to building an exercise habit that sticks.
Pick your way back in
Every popular way back into exercise this year has its own guide, each with a week that fits it around the same free 3 day strength plan:
- Walking: Japanese walking, the 6-6-6 walk, the 12-3-30 treadmill workout, rucking, how many steps a day you need.
- Cardio: zone 2 cardio, exercise snacks, the run-walk method, heart rate variability.
- Strength: muscle memory, functional fitness, kettlebells, hybrid training, HYROX.
- Pilates and mobility: Pilates for beginners, wall Pilates, a 10 minute mobility routine, balance exercises.
- The rest of life: gym anxiety, protein, exercise and mood, lifting on a GLP-1, longevity training, strength for pickleball.
A week of walking plus strength
From week 3, this is the week to settle into:
| Day | Session | How long |
|---|---|---|
| Monday | Full Body A | About 45 minutes |
| Tuesday | Brisk walk or walking intervals | 30 minutes |
| Wednesday | Full Body B | About 45 minutes |
| Thursday | Mobility, stretching or a Pilates class | 20 to 45 minutes |
| Friday | Full Body C | About 45 minutes |
| Saturday | Longer easy walk | 45 minutes |
| Sunday | Rest | None |
Full Body A, B and C each cover a squat, a hinge, a push, a pull and a carry or core move, in about 45 minutes.
Start your comeback plan, free
Let the app pick your starting weights so easy actually means easy, and keep the walks logged on the days between. Full Body, 3 days is free in Liftspan: it's built for your equipment and around any joint you flag, every weight is set for you and moved up as you earn it, and each block ends with a lighter deload week. Rather use paper? Download the sheet.
Common questions
How long does it take to get back in shape after a long break?
It depends on how long you were off. In one study, people who stopped lifting for 10 weeks were back to their old strength and muscle after about five weeks of training. Plan on a month to rebuild the habit.
Should I start with cardio or weights?
Both, gently. Walk most days and lift two days a week for the first two weeks, then three.
How sore should I be after my first workout back?
A little stiff, not wrecked. If you can barely get out of a chair, cut a set from each exercise next time.
How many days a week should I work out when starting again?
Two strength sessions plus walking for the first two weeks, then three strength sessions with a rest day between each.
What if a joint hurts when I start again?
Don't push through it. Swap the exercise or lighten the load, and see a doctor or physiotherapist if it lingers. Liftspan builds the plan around joints you flag.
Using Liftspan? See setting up your first plan in the help manual. New to it? Liftspan is a strength training app for lifters over 40 that builds your plan around your joints and moves the weight for you.
Sources: Halonen et al. 2024, Does taking a break matter (Scandinavian Journal of Medicine & Science in Sports) · CDC, Adult activity: an overview · ACSM fitness trends 2026 · PureGym UK Fitness Report 2025/26 · ClassPass 2025 Look Back Report. General information, not a substitute for a clinician.
Keep reading: how to build an exercise habit that sticks · 3 day full body workout · all guides