Table 1.
Table 2.
Voice guidance on exercise status, heart rate (HR) estimation and exercise intensity.
Fig 1.
The distribution of the turning point ratio (TPR) in the clean and noisy signal groups.
The diamonds above and below represent the 5th and 95th percentiles of each group, and the squares above and below represent the 90th and 10th percentiles. Whiskers above and below represent the 75th and 25th percentiles, respectively. The circle is the median value.
Fig 2.
The distribution of Kur from the clean and noisy signal groups.
The diamonds above and below represent the 5th and 95th percentiles of each group, and the squares above and below represent the 90th and 10th percentiles. Whiskers above and below represent the 75th and 25th percentiles, respectively. The circle is the median value.
Fig 3.
Receiver operating characteristic (ROC) curves with 1—specificity versus sensitivity for THtpr and THkur, where a noisy signal corrupted by motion artifact is identified when TPR ≥ THtpr and Kur ≥ THkur.
Table 3.
Root mean square error (RMSE) and mean absolute error (MAE) for walking (warm-up), two stages of jogging, and walking (cool-down).
Table 4.
Number of segments, noisy segments, and false negatives in walking (warm-up), two stages of jogging, and walking (cool-down).
Fig 4.
Pre-exercise on the developed cardiac rehabilitation program (CRP) with an iPhone app.
(a) main menu, (b) target heart rate zone (THZ) set-up, (c) exercise type, stage order and heart rate (HR) estimation, and (d) duration of each stage and specification.
Fig 5.
Exercise with the S-CRP on an iPhone.
(a) shifting to the main exercise stage with voice guidance: “It is time to do the main exercise,” (b) measuring HR with voice guidance: “Please place your fingertip on the camera to estimate your heart rate,” (c) providing guidance on the exercise intensity with voice guidance: “Your heart rate is high. Please slow down,” and (d) detecting motion artifacts: “Your measured pulse is of low quality. Please place your fingertip on the camera again.”
Fig 6.
Rehabilitation results and medical report.
Table 5.
Exercise prescription based on a maximal exercise testing.
Fig 7.
Individual HR traces obtained from the Holter and the S-CRP during exercise: the voice guidance “Your heart rate is high. Please slow down” was given to the participant #2 and #4 (a circle mark).
(a) participant #1, (b) participant #2, (c) participant #3, and (d) participant #4.