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The World Health Organization Of The United States Of America

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Introduction:
In the United States of America, 8 out of 10 (186 million) men and women aged 18 and older are "weight conscious", according to a new national survey released by the Calorie Control Council 1. 54% of these people want to reduce their weight and an additional 28% of Americans are trying to control or maintain their weight1. According to the World Health Organization, in 2014, more than 26% of the population were considered overweight (BMI > 25), and 8% were obese (BMI>30) 2. It is clear that today’s society represents and outstanding need and demand for better individual health and fitness, all of which can be fulfilled by wearable technology.
Considered to be the forefather of wearable technology, the 17th century abacus …show more content…

The ability to answer phone calls, get directions and check ones heart rate all from a small device on ones wrist was inconceivable. Apple has made this a reality with the Apple Watch.
While the watch serves as a companion to the iPhone, it almost diminishes the need for it. One can makes calls, send texts, check emails and even play games from their wrist. However, while these features are incredibly useful, the Apple Watch’s health and fitness features prove to be a selling point for many consumers.
The purpose of this essay is to investigate the validity and function of the Apple Watch’s fitness features. This will be determined in two ways. Firstly, the ability of the Apple Watch’s to promote a healthy lifestyle will be reviewed. Secondly, its ability to accurately measure and quantify this lifestyle will be analyzed.
Hardware:
In order to fully investigate the Apple watch’s fitness features, some background will be given on the hardware the Apple Watch uses to measure one’s fitness. The main hardware components used to measure fitness are the heart rate sensor and accelerometer7 .
The heart rate sensor measures heart rate using a method called photo-plethysmography. Because of the fact that blood is red, reflects red light and absorbs green light, green LED lights paired with light sensitive photodiodes are used to detect the amount of blood flowing through the wrist at

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