A body composition test, in plain English
A body composition test splits your weight into fat and lean tissue rather than giving you one number on a scale. Clinics use two main methods. DEXA is a low-dose X-ray scan you lie still for, and it also reports bone density. Bioimpedance sends a small, painless electrical current through your body and estimates the split from how easily it travels.
People use it to see what is changing as they train or change their diet, since the scale alone cannot tell muscle gained from fat lost. The two methods are different tests, so a number from one is not directly comparable with a number from the other. Bioimpedance is offered under brands like InBody.
Physical activity in Portland, by the numbers
The rate of physical inactivity in Portland is lower than the national rate. About 1 in 5 adults in Portland did no physical activity outside work in the past month, compared with about 1 in 4 nationally. That adds up to roughly 370,000 adults across six counties.
By county
| County | No exercise outside work | Obesity | Serious difficulty walking |
|---|---|---|---|
| Multnomah | 17.6% | 28.9% | 10.5% |
| Washington | 17.7% | 32.4% | 10.2% |
| Clark | 19.8% | 35.3% | 11.8% |
| Clackamas | 19.7% | 34.0% | 11.9% |
| Yamhill | 20.8% | 37.0% | 13.2% |
| Columbia | 22.1% | 33.5% | 14.3% |
| Portland | 18.7% | 32.3% | 11.1% |
| United States | 25.1% | 33.2% | 13.8% |
Source: CDC PLACES, 2023 county estimates. Portland = Multnomah, Washington, Clark, Clackamas, Yamhill and Columbia counties, weighted by adult population.
longevityclinicshub.comYour regular doctor is the place to start, especially before a big change in how active you are. The tests above show where you're starting from, so progress is easier to see later.
