Figure 4
From: Noncontact assessment for fatigue based on heart rate variability using IR-UWB radar
Power spectrum distribution of HRV using IR-UWB radar. (A) HRV distribution in LF and HF region when subject was on supine position before exercise (Rest). (B) HRV distribution in LF and HF region when subject was on supine position during 0 ~ 10 min of post-exercise (Fatigue-1). (C) HRV distribution in LF and HF region when subject was on supine position during 10 ~ 20 min of post-exercise (Fatigue-2). (D) HRV distribution in LF and HF region when subject was on supine position during 20 ~ 30 min of post-exercise (Recovery).
