What the Physical Activity Guidelines for Americans Actually Say

The Guidelines at a Glance

The Physical Activity Guidelines for Americans are issued by the U.S. Department of Health and Human Services. The most recent edition — the second — was published in 2018 and remains the current federal reference for how much and what kind of movement adults and children need for meaningful health benefit.

The guidelines draw on a systematic review of thousands of published studies, making them one of the most evidence-grounded public health documents available to consumers. They are not prescriptions from a doctor — they are population-level targets rooted in what the research shows tends to benefit health outcomes across diverse groups.

This article is for general informational purposes only and does not constitute medical or personal health advice. Consult a qualified healthcare professional before beginning or significantly changing a physical activity program.

What Counts as Physical Activity

The guidelines define physical activity broadly: any body movement produced by skeletal muscles that results in energy expenditure. Practically, this includes structured exercise, but also occupational movement, household tasks, recreational play, and active transportation like cycling or brisk walking.

Activity is categorized by intensity — moderate-intensity efforts (like brisk walking or casual cycling) and vigorous-intensity efforts (like jogging, swimming laps, or aerobic dance) are weighted differently in the recommendations. One minute of vigorous activity is considered roughly equivalent to two minutes of moderate activity, meaning the guidelines allow for flexible combinations.

Walking as exercise is a frequently discussed example: a brisk pace that noticeably increases heart rate qualifies as moderate-intensity aerobic activity, though its impact varies by individual fitness level and terrain.

Key Recommendations by Age Group

The guidelines divide recommendations across life stages:

• Adults (18–64): At least 150–300 minutes of moderate-intensity aerobic activity per week, or 75–150 minutes of vigorous-intensity activity, or an equivalent combination. In addition, muscle-strengthening activities involving all major muscle groups are recommended on two or more days per week.
• Older Adults (65+): Same aerobic and muscle-strengthening targets, plus balance training to reduce fall risk. Older adults with chronic conditions should consult a healthcare provider about how to adapt activity safely.
• Children and Adolescents (6–17): 60 minutes or more of moderate-to-vigorous activity daily, including vigorous aerobic activity and muscle- and bone-strengthening activities at least three days per week.
• Young Children (3–5): Active play throughout the day; no specific minute target, but caregivers are encouraged to facilitate movement-based activities.

Notably, the 2018 edition removed the earlier requirement that activity be performed in bouts of at least 10 minutes, affirming that shorter bursts of movement still accumulate meaningfully toward weekly totals.

What the Research Behind the Guidelines Shows

The evidence base reviewed for the 2018 guidelines connected regular physical activity to a reduced risk of all-cause mortality, cardiovascular disease, type 2 diabetes, several cancers, depression, anxiety, and cognitive decline. Benefits were observed across a wide spectrum — from people who were previously sedentary to those already moderately active.

A critical finding: some activity is better than none. The guidelines explicitly state that individuals who do any physical activity gain some health benefit, even if they fall short of the full weekly targets. This represents a meaningful shift in public health messaging from earlier editions, which implied that sub-threshold activity offered little value.

The evidence also supports additional benefits for those who exceed the minimum targets — up to 300 minutes of moderate activity per week — without identifying a clear upper harm threshold for otherwise healthy adults engaging in moderate-intensity movement.