![]() Generally, running tests with the equipment is straightforward and easy, with most of the demand on analysis of the data and knowing how to improve the findings. Any professional who needs to know the metabolic data of an athlete at rest or during exercise can be educated and trained to utilize the technology. In hospitals, lab techs commonly run the equipment, with qualified professionals performing the analysis. Most of the users of metabolic gas analyzers are sport scientists, but coaches and nutritionists are appropriate as well. Today, the typical lab cart and treadmill solution is the most commonly employed testing option for conditioning tests. Newer systems are promising, as they have no hoses or wearable devices, but they have yet to be thoroughly vetted by multiple peer review studies. ![]() Some systems are technically portable and provide a backpack-like solution for activities that are on the grass, but due to their size, still have issues replicating a perfect environment. Some advanced systems are suitable for swimming tests, but a flume water treadmill is costly for even high performance centers. Each mode of graded exercise has pros and cons, meaning athlete data may not be transferable to the field if the mode of exercise has poor relevance to the sport. Most systems that test athletes use a treadmill to estimate aerobic performance, but nearly every analyzer works fine with stationary cycling, rowing, and any cyclical equipment. Macronutrient distribution and caloric intake prescription with periodized diets are growing in popularity, but without direct measures, many of the estimations are not accurate. ![]() Aging populations, recreational athletes, and elite competitors can all benefit from testing at rest conditions. Nutritionists who are progressive and want to actually prescribe nutritional interventions based on metabolic profiles can use advanced systems to address individual measures. Straightforward health and wellness measures that are important but not directly related to performance are metabolic rate and efficiency type metrics. Ventilatory equivalents measures (VE/VO2 and VE/VCO2).The common metrics used by gas analysis systems are: Gas exchange analysis gauges an athlete’s ability to extract oxygen and use it for aerobic function. An assessment of the changes in oxygen extraction and carbon dioxide transport out of the body assumes that arterial levels are parallel with changes in respiratory exchange, and while they are very similar, they are not the same in real time. How oxygen and carbon dioxide are exchanged in the body potentially determines how an athlete can cope with fatigue, as well as what output they are able to compete with. In addition to oxygen extraction, systems can also determine how much carbon dioxide is exhaled. The primary reason to perform gas exchange analysis on an athlete is to get an accurate assessment of their ability to extract oxygen and use it for aerobic performance. Therefore, this guide will also briefly mention systems that are able to determine metabolic rate and substrate extraction. Metabolic testing is more than just oxygen utilization it’s important for the utilization of macronutrients for fuel as well. There is a growing trend toward portability, and the technology is on the verge of becoming consumer-friendly. While we make no recommendations, the list of companies mentioned creates an awareness of the products currently available to coaches and sport scientists. This buyer’s guide covers gas exchange analyzers in the market, including how they work and what the future is leading to. Evaluating the ability to extract oxygen and utilize it during exercise is a measurement that is common and valuable in the applied setting, as well as the research space. Conditioning is an important part of the sports performance and health of both athletes and the general population.
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