Impact of center-of-mass acceleration on the performance of ultramarathon runners

Shun Ping Lin, Wen Hsu Sung, Fon Chu Kuo, Terry B.J. Kuo, Jin Jong Chen

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Ultramarathon races are rapidly gaining popularity in several countries, raising interest for the improvement of training programs. The aim of this study was to use a triaxial accelerometer to compare the three-dimensional centerof- mass accelerations of two groups of ultramarathon runners with distinct performances during different running speeds and distances. Ten runners who participated in the 12-h Taipei International Ultramarathon Race underwent laboratory treadmill testing one month later. They were divided into an elite group (EG; n = 5) and a sub-elite group (SG; n = 5). The triaxial center-of-mass acceleration recorded during a level-surface progressive intensity running protocol (3, 6, 8, 9, 10, and 12 km/h; 5 min each) was used for correlation analyses with running distance during the ultramarathon. The EG showed negative correlations between mediolateral (ML) acceleration (r = -0.83 to -0.93, p < 0.05), and between anterior-posterior (AP) acceleration and running distance (r = -0.8953 to -0.9653, p < 0.05), but not for vertical control of the center of mass. This study suggests that runners reduce stride length to minimize mediolateral sway and the effects of braking on the trunk; moreover, cadence must be increased to reduce braking effects and enhance impetus. Consequently, the competition level of ultramarathons can be elevated.

Original languageEnglish
Pages (from-to)41-52
Number of pages12
JournalJournal of Human Kinetics
Volume44
Issue number1
DOIs
Publication statusPublished - Dec 1 2014
Externally publishedYes

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Keywords

  • accelerometer
  • race distance
  • ultra-marathon

ASJC Scopus subject areas

  • Physical Therapy, Sports Therapy and Rehabilitation
  • Physiology (medical)

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