9 Wrist devices for measuring and/or recording (other than for medical purposes) different physiological data, biosignals and/or exercise parameters, namely, blood oxygenation, heart rate, heart rate variability, electrocardiography, blood pressure, ventilation, body temperature, body flexibility, body strength, body motion, skin conductivity, blood glucose, lactic acid and/or recording, time, distance, speed, acceleration, altitude, environmental temperature, humidity and purity; precision balances; computer software applications for supervision of weight