Inaugural Best Paper award, Velocity profiling using inertial sensors for freestyle swimming

adat-in-actionCongratulations Andy on winning the inaugrall Best paper of the year award in the prestigous Journal of Sports Engineering.

It is the culmination of many years of work towards Dr. Stamm’s PhD. We look forward to hopefully seeing you at the ISEA Engineering of Sport conference later in the year to accept your award

Sports Engineering
March 2013, Volume 16, Issue 1, pp 1-11
Velocity profiling using inertial sensors for freestyle swimming
Andy Stamm, Daniel A. James, David V. Thiel
The ability to unobtrusively measure velocity in the aquatic environment is a fundamental challenge for engineers and sports scientists and important in assessing the skill level. The aim of this research was to develop a method for velocity profiling in freestyle swimming utilising a purpose-built inertial sensor. Seventeen swimmers with different experience levels participated in this study performing a total of 159 laps in the velocity range from 0.79 to 2.04 m s−1. Data were collected using a triaxial accelerometer and a tethered velocity meter. The collected acceleration data were filtered using a 0.5 Hz Hamming-windowed FIR filter to remove the gravitational acceleration before the lap velocity profiles were calculated. These calculated lap velocity profiles were then compared with the velocity profiles measured by the velocity meter using Bland–Altman analysis. The scattering follows a normal distribution with a mean skewness of 0.96 ± 0.47 and kurtosis of 2.93 ± 1.12. The results show that an inertial sensor alone can be used to determine a lap velocity profile from single point acceleration records.


See the full article here

A structured approach for technology innovation in sport

Ringuet-Tech_innovation_in_Sport2014_pdf__page_7_of_14_Congratulations Caroline on the publication of your recent Technology innovation paper. It gives us a way to approach innovation in a structured way by capturing expertise an finding opportunities in a programmed way.

A structured approach for technology innovation in sport 

Caroline J. Ringuet-Riotab, Allan Hahnbc & Daniel A. Jamesbc

a Department of Tourism, Sport and Hotel Management, Griffith Business School, Griffith University, Brisbane, Australia

b Queensland Sports Technology Cluster, Brisbane, Australia

c Sports and Biomedical Engineering Laboratory (SABEL), School of Engineering, Griffith University, Brisbane, Australia
Published online: 07 Feb 2014.

Technology innovation plays a vital role in elite sport, yet often proceeds in an ad hoc manner, emerging from the grass roots of sport rather than as a strategic programmed activity. This paper presents a model for systematic technology innovation in sport. It was developed from an extensive review of innovation and management best practice from the literature and draws on successful examples of innovation in sport. The model uses needs assessment, context and stakeholder theory, together with structured enquiry, to establish technological literacy and identify translational and technology-ready opportunities to meet existing and emerging needs. It consolidates existing knowledge, translates exemplars of innovation from sport and other settings and highlights process innovation as being a vital element in the achievement of innovation. The model is then applied to a professional sports organization demonstrating its utility as an organizational tool for planning for innovation and highlighting areas of best practice. Identification of near and mid-term opportunities for innovation was a key outcome.

Get the full paper here

Visualization of wearable sensor data

Visualisation of sensor dataAnother step in the evolution of human motion assessment has occurred from the team at Griffith University.  The recent publication by Rowlands, Lee, James,  “Visualization of wearable sensor data during swimming for performance analysis” in Sports Technology (DOI:10.1080/19346182.2013.867965) explains methods of visually depicting gyroscope data  using novel 2D overlay techniques of the repetitive data. These methods included overlay plots, ribbon plots, phase-space portraits and wavelet scalograms. All the methods used clearly highlight the differences in the action of the elite and sub-elite swimmer involved in the case study.  The consistency of the elite swimmer’s body-roll compared to the sub-elite swimmer appears to be most apparent in the state phase plot.  This is an exciting new avenue in our research direction and will continue to be a focus of our research.  The article can be found here:

Sports Tech at the Winter Olympics

ISEA Newsletter Vol1 Issue1 Nov 2012.pdf (1 page)Well the winter olympics is here, and there is plenty of it in the news, on and off the snow. Here’s what the ISEA’s president has been reporting on

“There’s no way you’re going to get to the Olympics without technology. It’s in the equipment, it’s in the apparel design, it’s in the training science,” says Kim Blair to CBS

keep up the good work Mr. President


Narrow escape from the digital ice age

ImageYikes, I’m pulling out some old legacy Word files to save a bunch of time. Fortunately the files restored  on a Gold CD cause my 3 1/2 inch disks don’t fit anywhere anymore…thats even if the media is still good, but nothings opening it. Whats the first thing I find on searching for help but this cute article on the digital ice age. Fortunately I also found the Libre Office project…phew!!!


While we are on the subject of Ice, check out Peter’s time lapse from Davis Base Antarctic (a 40 day time-lapse no less) he just sent us yesterday.