Muscle Fatigue in the Half Rising Posture

Bibliographic Data

ID19262201
AuthorsMasahiko Sato (0000-0002-5611-4483, Division of Anthropology & Kinesiology Japan Women's College of Physical Education, corresponding author)
Year1966
Volume74
Issue5
Pages195-201
Publication date1966-01-01
Open AccessYes
TypeARTICLE
VenueThe Journal of Anthropological Society of Nippon (JOURNAL)
Journal identifiersISSN: 0003-5505 • E-ISSN: 1884-765X
PublisherAnthropological Society of Nippon (PUBLISHER • JP)
DOI10.1537/ase1911.74.195
OpenAlexW2315440362
LanguageEN
Citations received7
References cited3

The half rising posture is very often seen among Japanese labourers and is well known to induce them to get tired if too prolonged. The electromyographic investigation of this posture were already reported by KAWAKAMI & TAKANO ('54) and KoNDO ('60). However, compared with recent works of the frequency analysis of the global EMG (SATO et al. '65), there are some difficulties in accepting their interpretation that a considerably strong contraction of the twojoint thigh muscle is responsible for hardness of keeping the half rising posture for a long time. The present study was designed to clearify this problem. The results are summarized as follows :1) The erector trunci, the gluteal muscles, the quadriceps femoris, the hamstrings, and the ankle extensors are contracting intensely while keeping the half rising posture. The quadriceps femoris worked most intensely in the posture with flexed knee joints and their activities were more increased with increases in the flexion of the knee joints.2) Throughout all the angles of the knee joints, the rectus femoris works more weakly than the synergistically operating one-joint muscles.3) The increasing rate of the global EMG accompanied with fatigue in this posture is greater in the vastus lateralis than in the rectus femoris and the vastus medialis.4) The degree of the lowering in the frequency spectra of the EMG was much smaller in the rectus femoris than in the synergistically operating onejoint muscles.5) There was no indication to support the previous concept that the fatigability of the two-joint muscle was responsible for difficulty in keeping this posture

Ankle · Electromyography · Knee flexion · Knee Joint · Physical medicine and rehabilitation · Physical therapy · Quadriceps femoris muscle · Rectus femoris muscle · Thigh · Vastus medialis · Anatomy · Ergonomics and Musculoskeletal Disorders · Medicine · Muscle activation and electromyography studies · Musculoskeletal pain and rehabilitation · Surgery

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