2 years ago

A new study out of the University of Cambridge reveals how their researchers have designed a new way to accurately and constantly measure your VO2 Max, without needing to visit a fitness Lab.
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Links:
https://www.nature.com/articles/s41746-022-00719-1
https://arxiv.org/abs/2205.03116
https://ui.adsabs.harvard.edu/abs/2022arXiv220503116S/abstract
https://bit.ly/3Sq5pAj
https://europepmc.org/article/med/36460766

Normally, tests to accurately measure VO2 Max, a key measurement of overall fitness and an important predictor of heart disease and mortality risk, require expensive laboratory equipment and are mostly limited to elite athletes. This new method uses machine learning to predict VO2 Max, the capacity of the body to carry out aerobic work, during everyday activity, without the need for contextual information such as GPS measurements. In what is by far the largest study of its kind, the researchers gathered activity data from more than 11,000 participants in the Fenland Study using wearable sensors, with a subset of participants tested again seven years later. The researchers used the data to develop a model to predict VO2max, which was then validated against a third group who carried out a standard lab-based exercise test. The new model showed a high degree of accuracy compared to lab-based tests, and outperformed other approaches. Some smartwatches and fitness monitors currently on the market claim to provide an estimate of VO2max, but since the algorithms powering these predictions aren't published, and are subject to change at any time, it's unclear whether the predictions are accurate, or whether an exercise regime is having any effect on an individual's VO2max over time. The Cambridge-developed model is more robust, transparent and provides accurate predictions based on heartrate and accelerometer data only. Since the model can also detect fitness changes over time, it may also be useful in estimating fitness levels for entire populations and identifying the effects of lifestyle trends on longevity. The measurement of VO2max is considered the 'gold standard' of fitness tests. Professional athletes, for example, test their VO2max by measuring their oxygen consumption while they exercise to the point of exhaustion. There are other ways of measuring fitness in the laboratory, but these require specialized equipment. Additionally, strenuous exercise can be a considerable risk to some individuals.
Dr. Soren Brage, of Cambridge University's MRC Epidemiology Unit, and co-author of the study said "VO2max isn't the only measurement of fitness, but it's an important one for endurance, and is a strong predictor of diabetes, heart disease, and other mortality risks. However, since most VO2max tests are done on people who are reasonably fit, it's hard to get measurements from those who are not as fit and might be at risk of cardiovascular disease."
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