Reference:
A Wixted, D Thiel, D James, A Hahn, C Gore, D Pyne, Signal Processing for Estimating Energy Expenditure of Elite Athletes using Triaxial Accelerometers, Sensors, 2005 IEEE, 4 pp.
Abstract: Fitness development of elite athletes requires an understanding of physiological factors such as athlete energy expenditure (EE). For athletes involved in football at the elite level, it is necessary to understand the energy demands during competition to develop training regimes. By identifying an appropriate EE estimator in triaxial accelerometer data, in conjunction with identifying sources of inter-athlete variance in that estimator, signal processing was developed to extract the estimator. In this system, low-power signal processing was implemented to extract both the EE estimator and other information of physiological and statistical interest.
Reference:
H.J. Montoye, H.C.G. Kemper, W.H.M. Saris, and R.A. Washbum, "Measuring physical activity and energy expenditure", Human Kinetics, Champaign, IL:, 1996, pp. 34-41.
B.E. Ainsworth, et al., "Compendium of Physical Activities: classification of energy costs of human physical activities", Med. Sci. Sports Exerc., Vol. 25, No.1, pp71-80, 1993.
H.J. Montoye, et al., "Estimation of energy expenditure by a portable accelerometer", Med. Sci. Sports Exerc. 15:403-407, 1983.
G.A. King, N. Torres, C. Potter, T.J. Brooks, and K. J. Coleman, "Comparison of activity monitors to estimate energy cost of treadmill exercise", Med. Sci. Sports Exerc., Vol. 36, No. 7, pp. 1244-1251, 2004.
A. Lai, D.A. James, J.P. Hayes, E.C. Harvey, "Semi-automatic calibration technique using six inertial frames of reference", Proceedings of the International Society of Optical Engineering. SPIE Vol. 5274, pp.531-542, Perth, Australia, Dec 2003. A. Wixted, D. James, D. Thiel, "Low power operating system and wireless networking for a real time sensor network", Proceedings IEEE ICITA, paper 112, Bathurst, Australia, Nov 2002
D.A. James, N. Davey, T. Rice, "An accelerometer based sensor platform for insitu elite athlete performance analysis", Proceedings IEEE Sensors conference. Vienna, October 2004.
P.U. Saunders, R.D. Telford, D.B. Pyne, R.B. Cunningham, C.J. Gore, A.G. Hahn, and J.A. Hawley, "Improved running economy in elite runners after 20 days of simulated moderate-altitude exposure", Journal Appl Physiol 96: pp.931-937, 2004. 
