Quantifying and assessing biomechanical differences in swim turn using wearable sensors

James Lee, Raymond Leadbetter, Yuji Ohgi, David Thiel, Brendan Burkett, Daniel A. James

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


The swim turn makes up a substantial portion of the total swim time in competition, and efficient turns can determine finishing positions in many competitions. Swim turns can be a neglected area of performance gain. This is largely due to the difficulty in extracting performance measures that might lead to improvement. An inertial sensor was used to assess the different phases of the swimming turn and the data were then compared to the synchronised video data. As a case study, two elite swimmers, a competitive pool swimmer and an elite Triathlete, were compared as a demonstration of the technology as a potential tool for routine use. The participants were asked to perform their typical tumble turn at two velocities. Timing of the rotation relative to the turn’s push off was measured. The inertial sensor detected differences in rotation between the two swimmers tested. The sensor reported that push off occurred for the competitive swimmer before 908and for the Triathlete after 908of rotation and was confirmed by video footage.

Original languageEnglish
Pages (from-to)128-133
Number of pages6
JournalSports Technology
Issue number3-4
Publication statusPublished - 2011


  • Efficiency
  • Inertial sensor
  • Performance
  • Swimming
  • Tumble turn

ASJC Scopus subject areas

  • Human Factors and Ergonomics
  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation
  • Engineering (miscellaneous)


Dive into the research topics of 'Quantifying and assessing biomechanical differences in swim turn using wearable sensors'. Together they form a unique fingerprint.

Cite this