Strength Training for Women Over 40: Do Light Dumbbells Count?

Yes, if the set gets hard. So the pair hiding under the bed can come out. A 2017 review of studies comparing light and heavy weights found that muscle growth was about the same with both, when the sets were taken to the point where another rep wasn't possible. Heavy weights did win on one thing: the most you can lift in a single rep. So light weights build the muscle. Heavy weights help you lift your heaviest.

You don't have to grind every set to the very last rep, either. The American College of Sports Medicine's 2026 position stand says going all the way to failure isn't necessary. It suggests stopping when you have about two or three good reps left, and says there isn't enough evidence to set the exact number.

How to tell if your pair is still heavy enough

• Do reps until it gets hard. Stop when two or three more would be a real struggle with good form.
• Count where that happens. A 2021 review of time-efficient training puts the target between 6 and 15 reps.
• Past 15, make it harder. Pick up a heavier pair, or switch to a harder version of the move, like a squat on one leg at a time. No heavier pair yet? Yours still works up to about 40 reps, as long as you keep going until you can't do another.

Light weights have one more thing going for them. The same review calls lighter loads a good fit for training at home and for people with achy joints.

Sotiria, 47, wrote this in her review of a Solin challenge: "At 47 yo it’s the only program that slowly but steadily gives me results!!! I can go at my own pace and complete the program anywhere and at anytime"

The US guidelines ask adults for strength work on 2 or more days a week that hits all the major muscle groups. That sounds like a lot of exercises. It isn't. Researchers who looked at the least training that still works found that three moves can cover every major muscle. Here's the minimum they set:

• Three moves. A squat, a push (a push-up or a dumbbell press) and a pull (a dumbbell row).
• At least two sets of each, twice a week. That gives each muscle four hard sets a week, the minimum in the 2021 review. The ACSM also advises two or more sets per move.
• Pair moves to save time. Do a set of rows, then go straight to a set of presses while your back rests. The same review found that pairing a push with a pull gets the same work done in about half the time.
• Split it if you have to. Squats before school drop-off and rows after bedtime count. The review says one session or several shorter ones, whatever suits you.

Start there. More sets build more muscle, so add a third day or a third set when you have the time. Solin challenges are built around 3 to 5 days a week at 20 to 30 minutes. For the moves and a week-by-week plan, follow our 6-week workout plan for women, or map your own days with the free weekly workout planner.

Jessica put the reason for a small plan best in her review: "As a 44-year-old mom of three with a full-time job, life is busy, so having a program that’s realistic and sustainable has made all the difference."

The minimum is easy to plan and easy to skip. What keeps you going is other people: a start date on the calendar and a group doing the same workouts that week. When Solin interviewed 93 winners, 90% credited the challenge community for their motivation and support. Community beats willpower. Shauna's Becoming Her: 40 Fit & Fierce is made for your decade: 8 weeks of strength workouts for women over 40, at home or the gym.

Krissi wrote in hers: "I'm 48 and for the first time I'm sticking with a workout routine and am looking and feeling stronger than I ever have."

Here's a number to aim for. The International Society of Sports Nutrition says 1.4 to 2.0 grams of protein per kilogram of body weight a day is enough for most people who exercise to build and keep muscle.

For a woman who weighs 150 pounds (68 kg), that's about 95 to 135 grams a day. Spread over four meals and snacks, it's about 25 to 35 grams each time. To find yours, divide your weight in pounds by 2.2, then multiply by 1.4 for the low end and by 2.0 for the high end.

Strong, not starving. If you're short on ideas, start with our high-protein cottage cheese recipes or Solin's high-protein breakfast recipes.

Most women start the menopause transition between 45 and 55, and the average age of menopause in the US is 52, says the National Institute on Aging. You'll read a lot of scary lines about what that does to your muscles. Here's what a large study of US women actually measured.

The SWAN study tracked women's bodies through the transition. Starting about two years before the final period:

• Fat gain sped up. The yearly rate went from about 1% to 1.7%.
• Lean mass started to slip, a little. About 0.5% over the whole transition, and lean mass counts water and organs, not only muscle.
• Weight didn't speed up. It kept climbing at the same steady pace as before.
• It levels off. After menopause, fat and lean mass stopped changing on average.

The researchers call hormones a plausible cause, not a proven one. So no, your muscles aren't melting at 40. Grip strength, a common stand-in for overall strength, peaks for women between ages 26 and 42, holds through midlife and declines after. In your 40s you're at or near your peak. Keeping strength is easier than getting it back, and a habit you build now is already in place when the transition starts.

Bone changes too, mostly around the final period. Our guide to strength training for women over 50 covers what that means for how you lift.

Eva wrote in her review: "for the first time in my life I have visible muscle! I’m 46 and a mom of two grown kids, and this program has truly changed my confidence and strength." Results vary, but that's the kind of change worth starting for.