Effects of Unilateral Muscle Fatigue on Performance and Force Coordination in Bimanual Manipulation Tasks

in Motor Control
View More View Less
  • 1 University of Delaware
  • 2 University of Split
  • 3 Rowan University
Restricted access

Purchase article

USD  $24.95

Student 1 year online subscription

USD  $77.00

1 year online subscription

USD  $103.00

Student 2 year online subscription

USD  $147.00

2 year online subscription

USD  $195.00

We examined the effects of unilateral muscle fatigue on the performance and coordination of grip (GF; normal component acting between the hand and object) and load force (LF; tangential component) in bimanual manipulation tasks, as well as the associated lateral differences. Eleven participants performed various symmetric bimanual tasks either without fatigue, or after fatiguing the GF producing muscles of either the nondominant or dominant hand. The GF/LF ratio of the fatigued and nonfatigued hand decreased and increased, respectively, while the neither the effects of fatigue on the task performance and GF-LF coordination, nor the lateral differences were revealed. The lack of the fatigue associated effects on most of the tested variables typically observed from unimanual tasks could be explained by bimanual assimilation. The findings also suggest that in daily life switching to bimanual tasks when one hand becomes fatigued could be beneficial regarding preserving the high level of both the manipulation performance and force coordination.

Feeney and Jaric are with the Dept. of Biomechanics and Movement Science, University of Delaware, Newark, DE. Jelaska is with the Faculty of Kinesiology, University of Split, Split, Coratia. Uygur is with the Dept. of Health & Exercise Science, Rowan University, Glassboro, NJ.

Address author correspondence to Slobodan Jaric at jaric@udel.edu.