In a stress test for elite athletes a physical system is used to measure the performance of the individual.
Indicate which of these signals are analog signals:
a) Heart rate Type: Numeric Range: Integers from 35 to 300 ECG
b) (Electrocardiogram) Type: Voltage; Range: [0.5-4 mV].
c) Activity level (accelerometer) = Type: Current, Range:[0-7 mA]
d) Weight = Type: Weight; Range: [25-100 kg]
e) VO2 Type: Liters / minute; Range: [2-7.51/min).
f) Respiratory Rate = Type: Numerical; Range: integers from 8 to 40.