The number
The Physical Activity Guidelines for Americans, published by the U.S. Department of Health and Human Services, ask adults for 150 to 300 minutes a week of moderate-intensity aerobic activity (or 75 to 150 minutes of vigorous), plus muscle-strengthening activity on two or more days a week.
That is 30 minutes, five days a week, plus two lifting sessions. Only about one in four American adults meets both halves, according to CDC surveillance data.
Every minute counts now
The 2018 edition of the guidelines dropped the old rule that activity had to come in 10-minute blocks to count. A brisk 6-minute walk counts. Three of them count more.
Build the week, not the workout
- Two or three full-body strength sessions beat five sessions you skip.
- Add a little weight, a rep, or a set over time — progressive overload is the whole engine.
- Walking is training. It is the most repeatable cardio there is.
- Take real rest days. Adaptation happens between sessions, not during them.
Where a written plan changes things
Guidelines tell you how much. They do not tell you which lifts, in what order, at what weight, for how many weeks. That is what a program is for.
If you want this handled for you instead of figured out alone, Billy's 90-Day Program is the version of all of this built around your body, your schedule and your starting point.
See the 90-Day ProgramCompletely optional. Everything above is yours either way.
- U.S. Department of Health and Human Services — Physical Activity Guidelines for Americans, 2nd edition (2018)
- Centers for Disease Control and Prevention — Adult Physical Activity Statistics
- American College of Sports Medicine — Guidelines for Exercise Testing and Prescription
Figures reflect the published guidance from these bodies at the time of writing. Guidelines are updated periodically — check the source for the current version.