Coaching sessions Flashcards
Accountability structures
A framework outlining the terms or conditions of an agreement between two parties.
Electrocardiogram (ECG)
Direct measurement of the heart’s electrical activity
Photoplethysmogram (PPG)
Optical measurement of blood circulation obtained by illuminating the skin and measuring changes in light absorption
Gyroscope
Measurement of orientation in space
Accelerometer
Measurement of three-axis movement and acceleration
Electrocardiography (ECG) is a measurement of
electrical activity at the heart that controls the expansion and contraction of the heart chambers, often using multiple electrodes
Photoplethysmography (PPG) uses
light-based technology to measure the rate of blood flow as controlled by the heart’s pumping action. In addition to measurements of heart rate, analysis of the PPG waveform can provide an accurate estimation of additional biometrics, depending on the wavelength or color of light utilized.
___________ PPG has been shown to be more readily absorbed by individuals with higher melanin levels
green light
most wearable devices utilize which light?
green light
which light is less reliable during physical activity?
red light
which light is better for all skin types?
red light
o correct for inaccuracies caused by motion in red light PPG sensors, many wearable technology companies have created algorithms that utilize the _______________ to produce high-quality PPG signals. For these adaptive filters, the ___________ movement data is used to detect and subtract motion from the PPG signal or to exclude the data completely if an accuracy threshold cannot be obtained.
accelerometer, accelerometer
pros of electrocardiography
clinical gold standard
cons of electrocardiography
Require multiple electrodes; diminished accuracy when measured at the wrist alone
pros of Photoplethysmography (PPG
Cost-effective; less invasive; provides an estimation of additional biometrics
cons of Photoplethysmography (PPG
Less motion-tolerant
Green Light PPG
more motion tolerant
cons of green light ppg
limitations for skin shades
