In this study, researchers pit five different fitness watches against a metabolic calorimetry chamber, and measured estimated physical activity calorie expenditure.

在这项研究中，研究人员将五种不同的健身手表与代谢量热室进行对比，并测量了估算的体力活动卡路里支出。

Unless you're a professional athlete, most of our calorie expenditure is accounted for by our basal metabolic rate.

除非你是一名职业运动员，否则我们的大部分卡路里消耗都是由我们的基础代谢率决定的。

Fortunately, people on average only compensate about 30% of the exercise-induced calorie expenditure, which doesn't seem too bad... until we look at the shockingly high variation between individual subjects.

幸运的是，人们平均只代偿了 30% 由运动引起的卡路里消耗，这似乎还不算太糟糕......直到我们看到个体之间惊人的差异。

So you have an equation that is only a loose estimate of calorie expenditure and you also have a variable in that equation, heart rate, that might not be accurately measured.

所以你可以得出一个等式，它只是卡路里支出的一个松散估计，等式中还有一个变量，心率，可能无法准确测量。

Using your heart rate, along with your age, height and weight, we can determine a close estimate of one's VO2, or oxygen consumption, which itself can be used as an estimate in calculating calorie expenditure.

根据你的心率，以及你的年龄、身高和体重，我们可以确定一个人的 VO2 或氧气消耗量的接近估值，氧气消耗量本身可以用作计算卡路里支出的估计。

Whether you agree or not about the system of calories in and calories out, the fact of the matter is the most correlated item to weight change, and when done right, fat loss, is total daily calorie expenditure.

无论你是否同意卡路里的摄取消耗系统，其实与体重的变化最为相关，如果处理正确，脂肪的消耗就是每天的卡路里总消耗。