Table 1 Accelerometers used in published paediatric studies*

Accelerometer	Manufacturer	Website	Type	Size	Weight
Actigraph (Previously CSA and MTI. Current model is GT1M)	Actigraph LLC, Pensacola, FL, USA	www.theactigraph.com	Uniaxial	38×37×18 mm	27 g
Actiheart	Cambridge Neurotechnology, Cambridge, UK	www.camntech.com	Uniaxial	33 mm diameter ×7 mm, connected to smaller sensor by wire	10 g
Actical	Mini-Mitter, Bend, OR, USA	www.minimitter.com	Omni-directional	28×27×10 mm	17 g
Actitrac	Individual Monitoring Systems, Baltimore, MD, USA	www.imsystems.net	Biaxial	37×55×12 mm	23 g
ActivTracer	GMS, Tokyo, Japan		Triaxial	70×50×15 mm	57 g
Actiwatch	Mini-Mitter, Bend, OR, USA	www.minimitter.com	Omni-directional	28×27×10 mm	16 g
BioTrainer Pro	Individual Monitoring Systems, Baltimore, MD, USA	www.imsystems.net	Biaxial	76×51×19 mm	51 g
Caltrac	Muscle Dynamics Fitness Network, Torrance, CA, USA	www.muscledynamics.net	Uniaxial	70×70×20 mm	78 g
Kenz Lifecorder	Suzuken Co. Ltd, Nagoya, Japan	www.suzuken.co.jp	Uniaxial	62×46×26 mm	42 g
Mini-logger Series 2000	Mini-Mitter, Bend, OR, USA	www.minimitter.com	Omni-directional	120×65×22 mm	125 g
Mini-Motionlogger	Ambulatory Monitoring, Inc, Ardsley, NY, USA	www.ambulatory-monitoring.com	Triaxial	44×33×10 mm	57 g
TriTrac R3D	Professional Products, Madison, WI, USA	No longer available (see RT3)	Triaxial	108×68×33 mm	170 g
RT3	Stayhealthy Inc., Monrovia, CA, USA	www.stayhealthy.com	Triaxial	71×56×28 mm	65 g
Tracmor2	Philips Research, Eindhoven, The Netherlands	Not commercially available	Triaxial	70×28×8 mm	30 g

*Details of published paediatric studies, papers or abstracts, using these devices can be obtained from manufacturer’s websites or from the corresponding author.