CDC Says Most U.S. Women 18–44 Still Miss Both Cardio and Strength Goals. What Counts as Enough Exercise?

Enough exercise is not just about steps, walking, or getting your heart rate up once in a while. For adults, the federal target includes both aerobic activity and muscle-strengthening activity. That is the practical takeaway from a new CDC analysis showing that most U.S. women ages 18 to 44 still are not hitting both parts of the goal.

The CDC report, published in December 2025, analyzed national survey data from 10,891 women ages 18 to 44. It found that 25.1% reported enough leisure-time activity to meet both the aerobic and muscle-strengthening recommendations. Another 21.7% met the aerobic goal only. Just 6.1% met the strength goal only. And 47.2% met neither.

That means nearly half of women in this age range reported not getting enough leisure-time activity to meet either part of the guideline. But the public-health message is not that exercise has to be perfect. It is that many people may be missing one important piece, especially strength work, and that doing more than you do now still helps.

What counts as “enough exercise” for adults?

Under the U.S. Physical Activity Guidelines, adults should aim for:

150 to 300 minutes a week of moderate aerobic activity, such as brisk walking, biking on level ground, or dancing
or 75 to 150 minutes a week of vigorous aerobic activity, such as running, fast cycling, or an intense workout class
plus muscle-strengthening activity on at least 2 days a week

You can also mix moderate and vigorous activity across the week.

In plain English, that could look like a brisk 30-minute walk five days a week, plus two short strength sessions. Or it could mean three harder cardio workouts and two days of strength work.

A useful rule of thumb is the talk test. During moderate activity, you can talk but probably not sing. During vigorous activity, you can only say a few words before needing a breath.

One important guideline update often gets missed: activity does not have to happen in 10-minute minimum blocks to count. Short bouts still count. A 7-minute brisk walk, a 12-minute home workout, or several quick movement breaks during the day can still add up.

Why strength training is often the missing piece

The CDC numbers suggest that cardio is not the only issue. Strength work appears to be the bigger gap.

In the same analysis, 55.3% of women ages 18 to 44 reported no muscle-strengthening activity at all. That helps explain why many women met the aerobic target without meeting the full guideline.

Strength training matters because it supports muscle mass, bone health, physical function, and long-term metabolic health. It can also make everyday tasks easier, from carrying a child to lifting groceries to getting up from the floor.

And it does not have to mean a gym membership.

Muscle-strengthening activity can include:

Wall push-ups or countertop push-ups
Squats to a chair
Resistance-band rows or presses
Step-ups on stairs
Lunges or sit-to-stands
Lifting household items such as filled laundry baskets or gallon jugs

The goal is to challenge major muscle groups, not to train like a bodybuilder.

Who was least likely to report meeting both goals?

The CDC analysis found clear differences in who reported meeting both exercise targets during leisure time.

Women who were less likely to report meeting both goals included:

Black women at 21.4%
Hispanic women at 23.4%
Asian women at 20.4%
White women reported the highest rate at 27.6%

The gap also showed up by age and education. Women ages 18 to 24 were more likely to report meeting both goals than women in their 30s and early 40s. Women with less education were also less likely to report meeting both goals than women with bachelor’s or graduate degrees.

These differences should not be read as biology or motivation alone. The CDC paper points to real-world barriers that can shape activity patterns, including access to safe places to exercise, cost, time, childcare, social support, neighborhood walkability, and familiarity with strength training.

There is another important limitation here: the CDC report measured self-reported leisure-time activity only. It did not count all physical movement from work, commuting, caregiving, housework, or other daily demands. So this paper does not describe total physical activity. It describes exercise and activity women said they did during their free time.

That matters because some women may be physically active in ways the survey did not fully capture. Even so, the findings still point to a major public-health problem: many women are not getting enough planned aerobic activity and especially not enough strength work during leisure time.

What newer heart research suggests, and what it does not

A newer study in Nature Cardiovascular Research adds some context about why this matters for long-term heart health. The study followed more than 85,000 UK Biobank participants whose activity was measured by wrist-worn accelerometers. It was a prospective observational cohort, not a randomized trial.

The researchers found that women appeared to gain strong associations with lower coronary heart disease risk at guideline-level activity, and that women in the study seemed to reach a similar risk reduction with less moderate-to-vigorous activity than men.

That is interesting, but it should be interpreted carefully.

This study cannot prove cause and effect. It was observational, not experimental. It also came from a UK cohort that was mostly white and may not reflect the full U.S. population. And it does not change current U.S. exercise guidelines.

So the takeaway is not that women only need half as much exercise, or that official recommendations should be ignored. The more careful takeaway is that the current guideline level seems meaningful for women’s heart health, and that women may benefit substantially from reaching it.

How to move closer to the goal without overthinking it

If you are not meeting the full target now, the best next step is usually not an extreme plan. It is a small, repeatable one.

You might start with:

10 to 20 minutes of brisk walking most days
2 short strength sessions a week using body weight, bands, or household items
Breaking up long sitting time with short movement breaks
Adding one thing at a time rather than trying to overhaul your week overnight

A simple week could be three brisk walks, two home strength sessions, and extra walking during errands or breaks. That is enough to start building toward the guideline.

If you have been inactive for a while, are pregnant or postpartum, or have a medical condition such as heart disease, lung disease, arthritis, diabetes, or a recent injury, starting gradually and checking in with a clinician may be wise.

What this means for readers

The new CDC numbers are a reminder that “enough exercise” means more than cardio alone. For adults, the target is cardio plus strength. That does not mean you need a perfect routine, a gym, or long workouts to benefit.

It does mean that if your current plan is all walking and no strengthening, you may be missing an important part of the recommendation. And if you are doing little or nothing right now, the message is still encouraging: any activity is better than none, and more activity than you do now can still improve health.

Sources

This article is for general informational purposes only and is not medical advice. Research findings can be early, limited, or subject to change as new evidence emerges. For personal guidance, diagnosis, or treatment, consult a licensed clinician. For current outbreak or public health guidance, follow your local health department, the CDC, or another relevant public health authority.