Table 2.
Summary of study findings
| Study author/year | Sample population | Design/methods | Summary of findings |
|---|---|---|---|
| Hwang J, et at. (2019) | N=51, mean age 44.4 (SD 16.6) yr, n=24 female, Korean | Compared FBC2 to ECG; participants with history of paroxysmal supraventricular tachyarrhythmia (SVT) were undergoing electrophysiological study; baseline HR during induced SVT and post ablation of SVT were measured | FBC2 accurately measures HR (94%) compared to ECG |
| Klepin K, et at. (2019) | N=60, mean age 31 (SD 7.3) yr, n=33 female, race not reported | Compared FBC2 to VO2max; all healthy adults; study duration: 1-week; 3 GPS tracked 15-minute outdoor runs and were worn continuously | FBC2 60-second cardiorespiratory fitness (CRF): highly associated with VO2max; MAPE 9.14% |
| Nelson BW, et al (2019) | N=1, age 29 yr, white male | Compared FBC2 to ECG; single subject, healthy adult male, used to minimize variable differences; 24-hour data collected across sedentary, walking, running, activities of daily living (ADLs), and sleeping | FBC2 mean difference −3.47 bpm compared to criterion and comparable tracker; MAE 5.96%, CCC 91% compared to ECG over 24 hours; MAPE 9.21% walking |
| O’Driscoll R, et al. (2019) | N=59, mean age 44.2 (SD 14.1) yr, n=41 female, European | Compared FBC2 to Polar chest strap; activities evaluated in a 1-day laboratory setting included running, walking, cycling, mimicked ADLs, and sedentary conditions with rest periods between | FBC2 HR = CM, but not consistent across activity levels; MAPE 31% walking incline; MAPE 69% walking |
| Reddy RK, et al. (2018) | N=20, mean age 27.5 (SD 6.0) yr, n=11 females, n=17 (85%) white | Compared FBC2 to Polar chest strap; 2-day data collection; all healthy adults; VO2max testing included resistance exercise, interval training, and ADLs conditions | FBC2 >error high intensity exercise; MAPE 10.79% |
| Tedesco S, et al (2019) | N=20, mean age 70.2 (SD 2.9) yr, n=11 female, all white (English/Irish) | Compared FBC2 to ActiGraph; 24-hour free-living data collection; all older, healthy adults; activities assessed included a range of moderate to vigorous walking and sleeping conditions | All devices highly correlated (ICC>0.89), FBC2 overcounted steps, MAPE 12.36% |
| Thomson EA, et al (2019) | N=30, mean age 23.5 (SD 3) yr, n=15 female, race not reported | Compared FBC2 to ECG; measurements taken at intervals: rest (3 min), standing (2 min), treadmill (every 3 min with gradual speed and uphill increase until volitional fatigue), recovery. | FBC2 error rate (3.9–13.5%). RER per activity level: light (5.36%), moderate (9.20%), vigorous (11%). |
| Vetrovsky T, et al. (2019) | Healthy control participants: n=15, mean age 65.5 (SD 12.6) yr, n=6 female. HF field-based study: n=14, mean age 43.3 (SD 18.9) yr, n=9 female. (Czech Republic) | Compared FBC2 to accelerometer; main purpose was to evaluate step accuracy of activity trackers in persons with HF; laboratory and field study | FBC2 healthy participants MAPE 12%; HF study MAPE 46%; >correlation low speeds on treadmill |