Individual Differences in Response to Supervised Exercise Therapy for Peripheral Artery Disease.

There was no control group, so changes cannot be separated from natural variability, measurement error, or other care received during the 12 weeks. The sample was small and came from Midwestern hospital programs, and most participants were non-Hispanic white and male, so results may not apply to other populations. 8 participants did not complete the program and their outcomes were not included. 27% reached the maximum Short Physical Performance Battery score, leaving little room to show improvement on that test. Gait speed was judged using benchmarks from older adults rather than people with PAD, which may overestimate nonresponse. Nonresponse was outcome-specific; a patient could fail one measure but improve on another, so a single outcome can mislead.

The supplied article text does not include a conflict-of-interest or funding declaration; journal metadata lists NIH and non-U.S. government research support.

Do not read the 29.0-m mean improvement as proof that supervised exercise works for every patient. This was a single-group pre-post analysis without a control group, and 31.8% did not improve on the primary outcome.