Changes in somatosensory input following local muscle fatigue

Kazuo Kuroiwa*, Yoshiaki Nishihira, Arihiro Hatta, Toshiaki Wasaka, Takeshi Kaneda, Sachiyo Akiyama, Tetsuo Kida, Masanori Sakamoto, Keita Kamijo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We studied whether exercise fatigue affects somatosensory input using somatosensory evoked potential (SEP). Sixteen subjects performed intermittent grip strength exercises with muscle fatigue while ignoring electrical stimulation given to an elbow. We induced SEP in the exercise task (during contraction) in every stage (first stage, middle stage and final stage). In addition, we induced SEP in the exercise task during relaxation in the first stage and final stage. As a result, the early component amplitude of SEP decreased with the progress of exercise (manifestation of muscle fatigue) during contraction and relaxation. Our findings suggested that somatosensory input decreased with the manifestation of muscle fatigue. Somatosensory input is necessary for control of voluntary movement. Therefore, we speculate that these factors play a role in decreased performance of athletes competing in long -duration events.

Original languageEnglish
Pages (from-to)433-442
Number of pages10
JournalJapanese Journal of Physical Fitness and Sports Medicine
Issue number4
Publication statusPublished - 2003 Aug
Externally publishedYes


  • Exercise
  • Gating
  • Muscle fatigue
  • Somatosensory evoked potential (SEP)

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health
  • Physiology
  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation


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