Tag: Fitness metrics

The Reactive Strength Index (RSI) is a key metric in sports science, used to measure an athlete's explosive lower body power and ability to transition from an eccentric to a concentric muscle contraction. This guide will demystify how to calculate RSI score for athletic and fitness applications, outlining the methods and necessary measurements to help you assess an athlete's reactive strength.

The average shoulder-to-hip ratio (SHR) for men is approximately 1.18, while for women it is around 1.03, reflecting fundamental biological differences in body shape. This article explains **what is the shoulder to hip ratio**, how to calculate it, and what it truly signifies for your health and physique.

While the Body Mass Index (BMI) is a common tool, it can be a misleading indicator of health for many, especially those with significant muscle mass. A person might appear thin but still carry unhealthy levels of body fat, a condition known as 'skinny fat,' making it clear that visual appearance is not the best way to determine 'How do you tell if you are slim?'.

While a scale is the most direct method, estimating body weight from size has long been a practice in medical and fitness fields. It's a fact, however, that a person's size doesn't perfectly correlate with weight due to differences in body composition. This guide will explore **how to calculate weight using size** with anthropometric methods, explaining the science and limitations behind the estimations.

The human body is composed of approximately 60% water, a fact vital for nearly every bodily function. Understanding where your personal hydration levels fall, such as knowing if **is 57% body water high?**, requires context beyond a single number.

Studies have shown that biological age can be up to a decade or more different from one's chronological age. But **is a body age calculator accurate** at measuring this complex metric? This comprehensive guide dives into the science, limitations, and practical use of these popular online health assessment tools.