Table 1.

The Devices Highlighted by the Aging Studies That Participated in the Workshop, Their Placements, Data Collection Frequencies, and the Pros and Cons of Each Device

Device	Study	Placement	Sampling Frequency (Hz)	Pros	Cons
Actiheart	BLSA, NSHD	Chest	32	Measures heart rate and movement	Participants complained about skin irritation from the electrodes
				Secure placement with electrodes prevents device shifting during wear time
				Heart rate provides validation of wear time
				Waterproof
ActivPAL	The Maastricht Study	Thigh	30	Accurate assessment of posture and postural changesAllows access to raw data filesWaterproof wrapping and continuous wear are possible	Mild skin irritation may occur with continuous wearNot effective in assessing moderate to vigorous levels of physical activity
Actigraph	WHS, AGES, LIFE	Right hip	30–100	Wide comparability to other studiesAllows access to raw data filesLong battery lifeLarge memory capacity	Participants removed belt for sleeping, some forgot to replace the belt the next day
					Some participants complained the belt was not “fashionable”
					Elastic belt shifted during wear time, which may lead to inconsistent measurement
Actical	Framingham	Right hip	32	Long battery lifeDelayed start optionWaterproofLightweightLow device failure rate	Participants removed belt for sleeping, some forgot to replace the belt the next day
					Some participants complained the belt was uncomfortable