Additional signals
| Additional Signals | ||
| Physiological Signals | Advantages | Limitations |
| Continuous ketone and lactate sensors | Lactate increase with exercise and can differentiate moderate-intensity exercise and high-intensity exercise. Ketone responds to different types of exercises. These levels ensure safety during exercise. |
Very limited ability to differentiate between the type of exercise, and mixed levels show a slow increase with exercise |
| Accelerometers and heart-rate sensors coupled with lactate sensing | Might have potential to inform CL on both exercise type (E.g., running, swimming or weights) and intensity (low, moderate, high or interval) | Non-specificity to exercise with stress, illness, medications, dehydration, and all potential modulators |
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Information from physiological signals like lactate, ketones, counterregulatory hormones, accelerometry, heart rate, galvaic skin response, skin temperature, and blood volume pulse could be used as potential adjunct for developing an algorithm about onset, offset and intensity of physical activity.
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Counterregulatory hormones can differentiate exercise intensity, however a lot of technical challenges were involved in measurement of them in real world.
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Other wearable sensors combining galvanic skin response, accelerometry, blood volume pulse, heart and skin temperature are able to classify the physical states and exercise type and could potentially differentiate exercise and physiological stress.
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MAT-BH-2200900/V1/Nov 2022