Quantified self - explained

The Quantified Self is a movement about trying to monitor and improve your everyday life. by using technology devices or gadgets. Monitoring includes inputs such as food consumed, quality of surrounding. Emotional states including mood, arousal, blood oxygen levels and performance both mental and physical.

Such self-monitoring and self-sensing, combines wearable sensors, EEG, ECG, video, and wearable computing, which is also known as life logging.