In vivo muscle fibre behaviour during counter-movement exercise in humans reveals a significant role for tendon elasticity

Yasuo Kawakami, T. Muraoka, S. Ito, H. Kanehisa, T. Fukunaga

Research output: Contribution to journalArticle

148 Citations (Scopus)

Abstract

Six men performed a single ankle plantar flexion exercise in the supine position with the maximal effort with counter movement (CM, plantar flexion preceded by dorsiflexion) and without counter movement (NoCM, plantar flexion only) produced by a sliding table that controlled applied load to the ankle (40 % of the maximal voluntary force). The reaction force at the foot and ankle joint angle were measured using a force plate and a goniometer, respectively. From real-time ultrasonography of the gastrocnemius medialis muscle during the movement, the fascicle length was determined. The estimated peak force, average power, and work at the Achilles' tendon during the plantar flexion phase in CM were significantly greater than those in NoCM. In CM, in the dorsiflexion phase, fascicle length initially increased with little electromyographic activity, then remained constant while the whole muscle-tendon unit lengthened, before decreasing in the final plantar flexion phase. In NoCM, fascicle length decreased throughout the movement and the fascicle length at the onset of movement was longer than that of the corresponding phase in CM. It was concluded that during CM muscle fibres optimally work almost isometrically, by leaving the task of storing and releasing elastic energy for enhancing exercise performance to the tendon.

Original languageEnglish
Pages (from-to)635-646
Number of pages12
JournalJournal of Physiology
Volume540
Issue number2
DOIs
Publication statusPublished - 2002 Apr 15
Externally publishedYes

Fingerprint

Elasticity
Ankle
Tendons
Foot Joints
Exercise
Muscles
Achilles Tendon
Ankle Joint
Supine Position
Ultrasonography
Skeletal Muscle
Power (Psychology)

ASJC Scopus subject areas

  • Physiology

Cite this

In vivo muscle fibre behaviour during counter-movement exercise in humans reveals a significant role for tendon elasticity. / Kawakami, Yasuo; Muraoka, T.; Ito, S.; Kanehisa, H.; Fukunaga, T.

In: Journal of Physiology, Vol. 540, No. 2, 15.04.2002, p. 635-646.

Research output: Contribution to journalArticle

@article{7db82cecccde47eba4e9e465e65a005e,
title = "In vivo muscle fibre behaviour during counter-movement exercise in humans reveals a significant role for tendon elasticity",
abstract = "Six men performed a single ankle plantar flexion exercise in the supine position with the maximal effort with counter movement (CM, plantar flexion preceded by dorsiflexion) and without counter movement (NoCM, plantar flexion only) produced by a sliding table that controlled applied load to the ankle (40 {\%} of the maximal voluntary force). The reaction force at the foot and ankle joint angle were measured using a force plate and a goniometer, respectively. From real-time ultrasonography of the gastrocnemius medialis muscle during the movement, the fascicle length was determined. The estimated peak force, average power, and work at the Achilles' tendon during the plantar flexion phase in CM were significantly greater than those in NoCM. In CM, in the dorsiflexion phase, fascicle length initially increased with little electromyographic activity, then remained constant while the whole muscle-tendon unit lengthened, before decreasing in the final plantar flexion phase. In NoCM, fascicle length decreased throughout the movement and the fascicle length at the onset of movement was longer than that of the corresponding phase in CM. It was concluded that during CM muscle fibres optimally work almost isometrically, by leaving the task of storing and releasing elastic energy for enhancing exercise performance to the tendon.",
author = "Yasuo Kawakami and T. Muraoka and S. Ito and H. Kanehisa and T. Fukunaga",
year = "2002",
month = "4",
day = "15",
doi = "10.1113/jphysiol.2001.013459",
language = "English",
volume = "540",
pages = "635--646",
journal = "Journal of Physiology",
issn = "0022-3751",
publisher = "Wiley-Blackwell",
number = "2",

}

TY - JOUR

T1 - In vivo muscle fibre behaviour during counter-movement exercise in humans reveals a significant role for tendon elasticity

AU - Kawakami, Yasuo

AU - Muraoka, T.

AU - Ito, S.

AU - Kanehisa, H.

AU - Fukunaga, T.

PY - 2002/4/15

Y1 - 2002/4/15

N2 - Six men performed a single ankle plantar flexion exercise in the supine position with the maximal effort with counter movement (CM, plantar flexion preceded by dorsiflexion) and without counter movement (NoCM, plantar flexion only) produced by a sliding table that controlled applied load to the ankle (40 % of the maximal voluntary force). The reaction force at the foot and ankle joint angle were measured using a force plate and a goniometer, respectively. From real-time ultrasonography of the gastrocnemius medialis muscle during the movement, the fascicle length was determined. The estimated peak force, average power, and work at the Achilles' tendon during the plantar flexion phase in CM were significantly greater than those in NoCM. In CM, in the dorsiflexion phase, fascicle length initially increased with little electromyographic activity, then remained constant while the whole muscle-tendon unit lengthened, before decreasing in the final plantar flexion phase. In NoCM, fascicle length decreased throughout the movement and the fascicle length at the onset of movement was longer than that of the corresponding phase in CM. It was concluded that during CM muscle fibres optimally work almost isometrically, by leaving the task of storing and releasing elastic energy for enhancing exercise performance to the tendon.

AB - Six men performed a single ankle plantar flexion exercise in the supine position with the maximal effort with counter movement (CM, plantar flexion preceded by dorsiflexion) and without counter movement (NoCM, plantar flexion only) produced by a sliding table that controlled applied load to the ankle (40 % of the maximal voluntary force). The reaction force at the foot and ankle joint angle were measured using a force plate and a goniometer, respectively. From real-time ultrasonography of the gastrocnemius medialis muscle during the movement, the fascicle length was determined. The estimated peak force, average power, and work at the Achilles' tendon during the plantar flexion phase in CM were significantly greater than those in NoCM. In CM, in the dorsiflexion phase, fascicle length initially increased with little electromyographic activity, then remained constant while the whole muscle-tendon unit lengthened, before decreasing in the final plantar flexion phase. In NoCM, fascicle length decreased throughout the movement and the fascicle length at the onset of movement was longer than that of the corresponding phase in CM. It was concluded that during CM muscle fibres optimally work almost isometrically, by leaving the task of storing and releasing elastic energy for enhancing exercise performance to the tendon.

UR - http://www.scopus.com/inward/record.url?scp=0037092282&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037092282&partnerID=8YFLogxK

U2 - 10.1113/jphysiol.2001.013459

DO - 10.1113/jphysiol.2001.013459

M3 - Article

C2 - 11956349

AN - SCOPUS:0037092282

VL - 540

SP - 635

EP - 646

JO - Journal of Physiology

JF - Journal of Physiology

SN - 0022-3751

IS - 2

ER -