# Study 000C Limitations

1. This remains a single-subject program.
2. The hybrid-cardio audit is based on summarized Garmin activity fields rather than full within-session trace reconstruction.
3. Garmin label taxonomy remains imperfect, which is why the correction was needed in the first place.
4. The program still cannot prove exact physiological or tissue-level mechanism.
5. This study corrects and tightens the program, but it does not create an external comparator cohort.