| MDPI | Multidisciplinary Digital Publishing Institute |
| CO2 | Carbon dioxide |
| CO | Carbon monoxide |
| CF | Cystic fibrosis |
| DLW | Doubly-labelled water |
| EE | Energy expenditure |
| E-nose | Electronic nose |
| FBAR | Film bulk acoustic resonator |
| HR | Heart rate |
| ICU | Intensive care unit |
| MR | Metabolic rate |
| MS | Mass spectrometer |
| NO | Nitric oxide |
| O2 | Oxygen |
| ppb | Parts per billion |
| ppm | Parts per million |
| SAW | Surface acoustic wave |
| SIT | Sprint interval training |
| VOC | Volatile organic compound |
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