Table 3.

Ear devices and other wearables designed to monitor parameters related to the training and health of athletes.

Device	Training parameters monitored	Health parameters monitored	Technology employed	Additional comments and scientific evaluation
EAR DEVICES
FreeWavz© (FreeWavz)	L, V, HR	Oxy	Accelerometer, pulse oximeter	Functions as a music player
Cosinuss One© (cosinuss, 2015)	(D), HR, HRV	(Oxy), Btemp	Photoplethysmograph, temp. sensor	Blood oxygenation sensor under development
Lumafit© (Lumafit, 2015)	D, HR, HRR		Accelerometer, photoplethysmograph	Duration via a Smartphone App
Bragi The Dash© (Bragi, 2015)	D,HR	Oxy	Accelerometer, gyroscope, magnetometer, pulse oximeter	Functions as a music player
OTHER DEVICES
BodyMedia Fit© (BodyMedia Inc, 2014)		Slt, Slq	Accelerometer, GSR, heat flux, skin temp.	Worn on the upper arm, designed to measure energy expenditure
Catapult Optimeye S5© (Catapult innovations, 2015)	D, L, V		Accelerometer, GPS, GLONASS, gyroscope	Worn in a specially design vest. The catapult model is reliable (TEM: 1.3%) and valid for measuring distance with compromised data when the sampling frequency is low (i.e., 1–5 Hz), athletes speed increases and/or at short distances (Jennings et al., 2010; Johnston et al., 2014). The accuracy of accessing velocity has a CV of 3.1–11.3%for the 10 Hz unit (Varley et al., 2012)
Misfit Shine© Misfit Wearables	L	Slt, Slq	Accelerometer	Can be worn anywhere on the body

Abbreviations: Btemp, body temperature; D, distance traveled; GPS, General Positioning System; GSR, Galvanic Skin Response; GLONASS, Global Navigation Satellite System; HR, heart rate; HRV, variability of heart rate; HRR, heart rate recovery; L, duration of exercise; Oxy, blood oxygenation; Slq, sleep quality; Slt, sleep time; TEM, typical error of measurement; V, velocity; (), with restrictions.