Yasuo Kawakami

Recent Publications (international journals/books)

Mitsukawa, N., Sugisaki, N., Miyamoto, N., Yanai, T., Kanehisa, H., Fukunaga, T., Kawakami, Y. Fatigue-induced changes in synergistic muscle force do not match tendon elongation. J. Biomech. (in press).

Akagi, R., Takai, Y., Wakahara, T., Kato, E., Ohta, M., Kanehisa, H., Kawakami, Y., Fukunaga, T. Development of an equation to predict muscle volume of elbow flexors for men and women with a wide range of age. Eur. J. Appl. Physiol. (in press).

Kato, E., Kanehisa, H., Fukunaga, T., Kawakami, Y. Changes in ankle joint stiffness by stretching: the role of tendon elongation of gastrocnemius muscle. Eur. J. Sport Sci. (in press).

Miyamoto, N., Mitsukawa, N., Sugisaki, N., Fukunaga, T., Kawakami, Y. Joint angle dependence of inter-muscle difference in postactivation potentiation. Muscle Nerve (in press).

Miyamoto, N., Kanehisa, H., Fukunaga, T., Kawakami, Y. Effect of postactivation potentiation on the maximal voluntary isokinetic concentric torque in humans. J. Strength Cond. Res. (in press).

Lee, H.-D., Kim, S.-J., Lee, D.-Y., Kurihara, T., Lee, Y.-S., Kawakami, Y. Shift in optimal joint angle of the ankle dorsiflexors following eccentric exercise. Exp. Mechanics (in press).

Wakahara, T., Takeshita, K., Kato, E., Miyatani, M., Tanaka, N. I., Kanehisa, H., Kawakami, Y., Fukunaga, T. Variability of limb muscle size in young men. Am. J. Human Biol. 22: 55-59, 2009.

Akagi, R., Takai, Y., Ohta, M., Kanehisa, H., Kawakami, Y., Fukunaga, T. Muscle volume compared to cross-sectional area is more appropriate for evaluating muscle strength in young and elderly individuals. Age Aging 38: 564-569, 2009.

Takai, Y., Ohta, M., Akagi, R., Kanehisa, H., Kawakami, Y., Fukunaga, T. Sit-to-stand test to evaluate knee extensor muscle size and strength of the elderly. A novel approach. J. Physiol. Anthrop. 28: 123-128, 2009.

Mitsukawa, N., Sugisaki, N., Kanehisa, H., Fukunaga, T., Kawakami, Y. Fatigue-related changes in fascicle-tendon geometry over repeated contractions: difference between synergist muscles. Muscle Nerve 40: 395-401, 2009.

Miyamoto, N., Fukunaga, T., Kawakami, Y. Evidence for inter-muscle difference in postactivation potentiation in the human triceps surae: A mechanomyographic study. Muscle Nerve 39: 703-705, 2009.

Akagi, R., Takai, Y., Kato, E., Fukuda, M., Wakahara, T., Ohta, M., Kanehisa, H., Kawakami, Y., Fukunaga, T. Relationships between muscle strength and indices of muscle cross-sectional area determined during maximal voluntary contraction in middle-aged and elderly individuals. J. Strength Cond. Res. 23: 1258-1262, 2009.

Chino, K., Mitsukawa, N., Kobayashi, K., Miyoshi, Y., Oda, T., Kanehisa, H., Fukunaga, T., Fukashiro, S., Kawakami, Y. The influence of fascicle behavior on the lack of velocity dependence in eccentric joint torque in humans: in vivo observation. J. Appl. Biomech. 25: 111-118, 2009.

Murata, K., Sugisaki, N., Miyamoto, N., Wakahara, T., Kanehisa, H., Kawakami, Y., Fukunaga, T. Elastic behavior of human in vivo triceps brachii tendon. Int. J. Sport Health Sci. 6: 162-168, 2008.

Takai, Y., Sawai, S., Kanehisa, H., Kawakami, Y., Fukunaga, T. Age and sex differences in the levels of muscular activities during daily physical actions. Int. J. Sport Health Sci. 6: 182-187, 2008.

Wakahara, T., Kanehisa, H., Kawakami, Y., Fukunaga, T. Effects of knee joint angle on the fascicle behavior of the gastrocnemius muscle during eccentric plantar flexions. J. Electromyogr. Kinesiol. 19: 980-987, 2008.

Shimoda, M., Fukunaga, T., Higuchi, M., Kawakami, Y. Stroke power consistancy and 2000 m rowing performance in varsity rowers. Scand. J. Med. Sci. Sports. 19: 83-86, 2008.

Kawakami, Y., Kanehisa, H., Fukunaga, T. The relationship between passive ankle plantar flexion joint torque and gastrocnemius muscle and Achilles tendon stiffness: implications for flexibility. J. Orthopaed. Sports Phys. Ther. 38: 269-275, 2008.

Ikegawa, S., Funato, K., Kanehisa, H., Fukunaga, T., Kawakami, Y. Muscle force per cross-sectional area is inversely related with pennation angle in strength trained athletes. J. Strength Cond. Res. 22: 128-131, 2008.

Akagi, R., Kanehisa, H., Kawakami, Y., Fukunaga, T. Estabilishing a new index of muscle cross-sectional area and its relationship with isometric muscle strength. J. Strength Cond. Res. 22: 82-87, 2008.

Chino, K., Oda, T., Kurihara, T., Nagayoshi, T., Yoshikawa, K., Kanehisa, H., Fukunaga, T., Fukashiro, S., Kawakami, Y. In vivo fascicle behavior of synergistic muscles in concentric and eccentric plantar flexions in humans. J. Electromyogr. Kinesiol. 18: 79-88, 2008.

Tsuchie, H., Kobayashi, K., Kanehisa, H., Kawakami, Y., Iso, S., Fukunaga, T. Assessment of Sprint Running Abilities Using a Resisted Self-driven Treadmill. Int. J. Health. Sport Sci. 6: 85-90, 2008.

Wakahara, T., Kanehisa, H., Kawakami, Y., Fukunaga, T. Fascicle behavior of medial gastrocnemius muscle in extended and flexed knee positions. J. Biomech. 40: 2291-2298, 2007.

Oda, T., Kanehisa, H., Chino, K., Kurihara, T., Nagayoshi, T., Fukunaga, T., Kawakami, Y. In vivo behavior of muscle fascicles and tendinous tissues of human gastrocnemius and soleus muscles during twitch contraction. J. Electromyogr. Kinesiol. 40: 2114-3120, 2007.

Kawakami, Y., Abe, Kanehisa, H., Fukunaga, T. Human skeletal muscle size and architecture: variability and interdependence. Am. J. Human Biol. 18: 845-848, 2006.

Kinugasa, R., Kawakami, Y., Fukunaga, T. Quantitative assessment of skeletal muscle activation using muscle functional MRI. Magnetic Resonance Imaging 24: 639-644, 2006.

Kawakami, Y., Fukunaga, T. New insights into in vivo muscle function. Exerc. Sport Sci. Rev. 34: 16-21, 2006.

Kanehisa, H., Ishiguro, N., Takeshita, K., Kawakami, Y., Kuno, S., Miyatani, M., Fukunaga, T. Effects of Gender on Age-related Changes in Muscle Thickness in the Elderly. Int. J. Sport Health Sci. 4: 427-434, 2006.

Yanagiya, T., Kanehisa, H., Tachi, M., Takeshita, K., Sugisaki, N., Wakahara, T., Murata, K., Takata, Y., Kawakami, Y., Fukunaga, T., Kuno, S. Effects of Age and Gender on the Power Generation Capabilities of Lower Limb Muscles in the Elderly. Int. J. Sport Health Sci. 4: 435-443, 2006.

Ohta, M., Masuo, Y., Kanehisa, H., Kawakami, Y., Fukunaga, T. Study on the application of bio-electrical impedance method for estimating tendon elongation. Int. J. Sport Health Sci. 3: 296-303, 2005.

Kawakami, Y. The effects of strength training on muscle architecture in humans. Int. J. Sport Health Sci. 3: 208-217, 2005.

Yoshitake, Y., Kawakami, Y., Kanehisa, H., Fukunaga, T. Surface mechanomyogram reflects length changes in fascicles of human skeletal muscles. Int. J. Sport Health Sci. 3: 280-285, 2005.

Oda, T., Kanehisa, H., Chino, K., Kurihara, T., Nagayoshi T., Kato, E., Fukunaga, T., Kawakami, Y. In vivo length-force relationships of muscle fiber and muscle tendon complex in the tibialis anterior muscle. Int. J. Sport Health Sci. 3: 245-252, 2005.

Sugisaki, N., Kanehisa, H., Kawakami, Y., Fukunaga, T. Behavior of aponeurosis and external tendon of the gastrocnemius muscle during dynamic plantar flexion exercise. Int. J. Sport Health Sci. 3: 235-244, 2005.

Kato, E., Oda, T., Chino, K., Kurihara, T., Nagayoshi, T. Fukunaga, T., Kawakami, Y. Musculotendious Factors influencing difference in ankle joint flexibility between women and men. Int. J. Sport Health Sci. 3: 218-225, 2005.

Wakahara, T., Ushiyama, J., Kanehisa, H., Kawakami, Y., Fukunaga, T. Effects of passive ankle and knee joint motions on the length of fascicle and tendon of the medial gastrocnemius muscle. Int. J. Sport Health Sci. 3: 75-82, 2005.

Kurihara, T., Oda, T., Chino, K., Kanehisa, H., Fukunaga, T., Kawakami, Y. Use of three-dimensional ultrasonography for the analysis of the fascicle length of human gastrocnemius muscle during contractions. Int. J. Sport Health Sci. 3: 226-234, 2005.

Kinugasa, R., Kawakami, Y., Fukunaga, T. Muscle activation and its distribution within human triceps surae muscles. J Appl Physiol. 99: 1149-1156, 2005.

Lemos, R. R., Rokne, J., Baranoski, V. G., Kawakami, Y., Kurihara, T. Modeling and simulating the deformation of human skeletal muscle based on anatomy and physiology. Comp. Anim. Virtual Worlds 16: 319-330, 2005.

Sugisaki, N., Kanehisa, H., Kawakami, Y., Fukunaga, T. Behavior of fascicle and tendinous tissue on medial gastrocnemius muscle during stretch-shortening cycle exercise of ankle joint. Int. J. Sport Health Sci. 3: 100-109, 2005.

Shimoda, M., Kawakami, Y. Critical power determination with ergometry rowing: relation to rowing performance. Int. J. Sport Health Sci. 3: 21-26, 2005.

Miyatani, M., Kanehisa, H., Ito, M., Kawakami, Y., Fukunaga, T. The accuracy of volume estimates using ultrasound muscle thickness measurements in different muscle groups. Eur. J. Appl. Physiol. 91: 264-272, 2004.

Muraoka, T., Muramatsu, T., Tachi, M., Kawakami, Y., Kanehisa, H., Fukunaga, T. Non-invasive estimation of the joint torque of the vastus lateralis during pedaling based on tendon elongation. Jpn. J. Biomech. Sports Exerc. 7: 214-221, 2003.

Nagayoshi, T., Kawakami, Y., Maeda, M., Maeda, Y., Hidaka, S., Ikeda, K., Maruyama, A. The relationship between ankle dorsiflexion torque and muscle size indices. Int. J. Sport Health Sci. 2: 216-221, 2003.

Yanagiya, T., Kanehisa, H., Kouzaki, M., Kawakami, Y., Fukunaga, T. Effect of gender on mechanical power output during repeated bouts of maximal running in trained teenagers. Int. J. Sports Med., 24: 304-310, 2003.

Kawakami, Y., Kubo, K., Kanehisa, H., Fukunaga, T. Effect of series elasticity on isokinetic torque-angle relationship in humans. Eur. J. Appl. Physiol. 87: 381-387, 2002. <Abstract>

Kawakami, Y., Muraoka, T., Ito, S., Kanehisa, H., Fukunaga, T. In vivo muscle-fibre behaviour during counter-movement exercise in humans reveals significant role of tendon elasticity. J. Physiol. 540: 635-646, 2002. <Abstract>

Kawakami, Y., Akima, H., Kubo, K., Muraoka, Y., Hasegawa, H., Kouzaki, M., Imai, M., Suzuki, Y., Gunji, A., Kanehisa, H., Fukunaga, T. Changes in muscle size, architecture, and neural activation after 20 days of bed rest with and without resistance exercise. Eur. J. Appl. Physiol. 84: 7-12, 2001. <Abstract>

Kawakami, Y., Muraoka, Y., Kubo, K., Akima, H., Suzuki, Y., Gunji, A., Fukunaga, T. Effects of 20 days of bed rest with and without resistance exercise on size, architecture, and force production of human skeletal muscles. Inactivity, Health, and Aging. Gunji, A. (ed.), Seigakuin University Press, Saitama, 2001, pp. 13-17. <Abstract>

Kawakami, Y., Muraoka, Y., Kubo, K., Suzuki, Y., Fukunaga, T. Changes in muscle size and architecture following 20 days of bed rest. J. Gravitat. Physiol. 7: 53-60, 2000. <Abstract>

Kawakami, Y., Lieber, R. L. Interaction between series compliance and sarcomere kinetics determines internal sarcomere shortening during fixed-end contraction. J. Biomech. 33: 1249-1255, 2000. <Abstract>

Kawakami, Y., Kumagai, K., Huijing, P. A., Hijikata, T., Fukunaga, T. The length-force characteristics of human gastrocnemius and soleus muscles in vivo. Skeletal Muscle Mechanics: From Mechanisms to Function. Herzog, W. (ed.), John Wiley & Sons, Chichester, 2000, pp. 327-341.

Kawakami, T., Amemiya, K., Kanehisa, H., Ikegawa, S., Fukunaga, T. Fatigue responses of human triceps surae muscles during repetitive maximal isometric contractions. J. Appl. Physiol. 88: 1969-1975, 2000. <Abstract>

Kawakami, Y., Ichinose, Y., Kubo, K., Ito, M., Fukunaga, T. Architecture of contracting human muscles and its functional significance. J. Appl. Biomech. 16: 88-97, 2000. <Abstract>

Kawakami, Y., Fukunaga, T. Specificity and plasticity of skeletal muscle architecture. J. Appl. Biomech. 16: 68-69, 2000.

Kawakami, Y., Ichinose, Y., Fukunaga, T. Architectural and functional features of human triceps surae muscles during contraction. J. Appl. Physiol. 85: 398-404, 1998. <Abstract>

Kawakami, Y., Sale, D. G., MacDougall, J. D., Moroz, J. S. Bilateral deficit in plantar flexion: relation to knee joint position, muscle activation, and reflex excitability. Eur. J. Appl. Physiol. 77: 212-216, 1998. <Abstract>

Kawakami, Y., Abe, T., Kuno, S., Fukunaga, T. Training-induced changes in muscle architecture and specific tension. Eur. J. Appl. Physiol. 72: 37-43, 1995. <Abstract>

Kawakami, Y., Nakazawa, K., Fujimoto, T., Nozaki, D., Miyashita, M., Fukunaga, T. Specific tension of elbow flexor and extensor muscles based on magnetic resonance imaging. Eur. J. Appl. Physiol. 68: 139-147, 1994. <Abstract>

Kawakami, Y., Abe, T., Fukunaga, T. Muscle-fiber pennation angles are greater in hypertrophied than in normal muscles. J. Appl. Physiol. 74: 2740-2744, 1993. <Abstract>

Kawakami, Y. Kanehisa, H., Ikegawa, S., Fukunaga, T. Concentric and eccentric muscle strength before, during and after fatigue in 13 year-old boys. Eur. J. Appl. Physiol. 67: 121-124, 1993. <Abstract>

Kawakami, Y., Hirano, Y., Miyashita, M., Fukunaga, T. Effect of leg extension training on concentric and eccentric strength of quadriceps femoris muscles. Scand. J. Med. Sci. Sports 3: 22-27, 1993.

Recent Presentations (international meetings; speaker)

Kawakami, Y. In vivo ultrasound imaging of fasciae (Invited Speech). Second International Fascia Research Congress, Amsterdam, the Netherlands, 10/26-30, 2009.

Kawakami, Y. Muscle/tendon behavior during contraction: findings on humans and rats. Symposium for Dr. Peter Huijing, 4/24, 2009.

Kawakami, Y., 2007, Design for effective power production in human movements: musculoskeletal perspective (Invited Speech). International Symposium on Nature-Inspired Technology, Daejeon, Korea, 10/11-12.

Kawakami, Y., Sakuma, J., Fukunaga, T., 2007, Muscle-tendon interaction in counter-movement exercise: effect of movement speed. 20th Congress of the European College of Sport Science, Jyvaskyla, July 11-14.

Kawakami, Y., Sugisaki, N., Chino, K., Oda, T., Fukunaga, T., 2006, Tendon mechanical properties: influence of muscle actions (Invited Speech). 5th World Congress of Biomechanics, Munich, July 30-August 4.

Kawakami, Y., Sugisaki, N., Chino, K., Kanehisa, H., Fukunaga, T., 2006, Behavior of Achilles tendon and gastrocnemius aponeurosis during concentric and eccentric plantar flexions (Invited Speech). 19th Congress of the European College of Sport Science, Lausanne, July 5-8.

Kawakami, Y., 2004, Strength training effects on muscle size and architecture: errors and interpretations (Invited Speech). 4th International Conference of Strength Training, Serres, 11/3-7.

Kawakami, Y., Huijing, P. A. J. B. M., Ito, M., Muraoka, Y., Kubo, K., Fukunaga, T., 2004, In vivo myofascial force transmission between passive EDL segments in humans. 14th European Society of Biomechanics Conference, 's-Hergogenbosch, the Netherlands, 7/4-7.

Kawakami, Y., 2004, Analysis of human skeletal muscles by ultrasound (Invited Lecture). 2003 Fall Conference of Korean Society of Sport Biomechanics, Ansan, 3/20.

Kawakami, Y., Oda, T., Chino, K., Kurihara, T., Nagayoshi, T., Kanehisa, H., Fukunaga, T., 2003, In vivo muscle fiber behavior in humans. World Congress on Medical Physics and Biomedical Engineering, Sydney, 8/24-29.

Kawakami, Y., Kurihara, T., Oda, T., Chino, K., Nagayoshi, T., Kanehisa, H., Fukunaga, T., Toji, H., Kaneko, M., 2003, In vivo force-velocity relationship of the human triceps brachii muscles. XIXth Congress of the International Society of Biomechanics, Dunedin, 7/6-11.

Kawakami, Y., Shimoda, M., Oishi, Y., Oda, T., Chino, K., Kurihara, T., Kanehisa, H., Fukunaga, T. Different fatigue responses of triceps surae muscles to repeated isometric contractions revealed by in vivo fascicle length changes. Banff Symposium on Skeletal Muscle, Banff, August 2-3, 2002.

Kawakami, Y., Kurihara, T., Chino, K., Oda, T., Nosaka, K., Fukunaga, T. Changes in mechanical properties of human tibialis anterior muscle following repeated eccentric contractions. IVth World Congress of Biomechanics, Calgary, August 4-9, 2002.

Kawakami, Y. Architecture of human skeletal muscles and its functional implications. Advances in Neural and Architectural Mechanisms That Control Muscle Activity and Movement, Tokyo, October 20, 2001.

Kawakami, Y., Nakai, K., Maganaris, C. N., Oda, T., Chino, K., Fukunaga, T. In vivo estimation of human Achilles tendon moment arm based on ultrasonography. 25^th Annual Meeting of the American Society of Biomechanics, San Diego, August 8-11, 2001.

Kawakami, Y., Fukunaga, T. Human skeletal muscle biomechanics—in vivo approach by ultrasonography—(Tutorial Lecture). XVIIIth Congress of the International Society of Biomechanics, Zürich, July 9-13, 2001.

Kawakami, Y., Oda, T., Chino, K., Kanehisa, H., Fukunaga, T. Flexibility is related to elasticity of tendon rather than muscle fibers: in vivo observation in humans. XVIIIth Congress of the International Society of Biomechanics, Zürich, July 9-13, 2001.

Kawakami, Y., Abe, T., Fukunaga, T. In vivo determination of skeletal muscle architecture in humans using ultrasonography. 45th Annual Convention of American Institute of Ultrasound in Medicine, Orlando, March 11-14, 2001.

Kawakami, Y., Muraoka, Y., Kubo, K., Akima, H., Suzuki, Y., Gunji, A., Fukunaga, T. Effects of 20 days of bed rest with and without resistance exercise on size, architecture, and force production of human skeletal muscles. 4th symposium of "Inactivity (prolonged bed-rest), Health and Aging", Saitama, April 10, 2000.

Kawakami, Y., Muraoka, T., Ito, S., Kanehisa, H., Fukunaga, T. In vivo muscle-fiber behavior reveal significant contribution of tendon elasticity in stretch-shortening cycle. 47th American College of Sports Medicine Annual Meeting, Indianapolis, May 31 - June 3, 2000.

Kawakami, Y., Amemiya, K., Kanehisa, H., Ikegawa, S., Fukunaga, T. Changes in voluntary and evoked plantar flexion torque during repetitive maximal isometric contractions. XVIIth Congress of the International Society of Biomechanics, Calgary, August 8-13, 1999.

Kawakami, Y., Kubo, K., Muraoka, T., Fukunaga, T. Observations of in vivo human muscle behavior reveal considerable interaction between muscle fibers and tendon (Invited Lecture). XVIIth Congress of the International Society of Biomechanics, Calgary, August 8-13, 1999.

Kawakami, Y., Fukunaga, T. The length-force characteristics of human gastrocnemius and soleus muscles in vivo. Canmore Symposium on Skeletal Muscle Mechanics, Canmore, August 6-7, 1999.

Kawakami, Y., Lieber, R. L. Sarcomere shortening during fixed-end contraction of frog semitendinosus muscles. 46th American College of Sports Medicine Annual Meeting, Seattle, June 2-5, 1999.

Kawakami, Y., Kubo, K., Fukunaga, T. In vivo measurements of human muscle behavior with special reference to tedon compliance. 3rd World Congress of Biomechanics, Sapporo, Japan, August 2-8, 1998.

Kawakami, Y. Architecture of contracting human muscles and its functional significance. Satellite Symposium of Congress of the International Society of Biomechanics: Specificity and Plasticity of Skeletal Muscle Architecture, 1997.

Kawakami, Y., Ichinose, Y., Fukunaga, T. Changes in muscle-tendon unit during passive stretching in humans. XVIth Congress of the International Society of Biomechanics; Book of Abstracts : 40, 1997.

Kawakami, Y., Sale, D., G. MacDougall, J. D., Moroz, J. S. Effect of knee joint angle on plantarflexor bilateral deficit. 43rd MTG of American College of Sports Medicine, Med. Sci. Sports Exerc. 28: S51, 1996.

Kawakami, Y., Sale, D. G., MacDougall, J. D., Moroz, J. S. Bilateral deficit in plantarflexor muscles during isometric contractions. 3rd Meeting of the Canadian Society of Exercise Physiology; Can. J. Appl. Physiol. 20: 26, 1995.

Kawakami, Y., Ichinose, Y., Fukunaga, T. The relationship between fascicle lengths of the triceps surae and ankle and knee joint angles in humans. XVth Congress of the International Society of Biomechanics; Book of Abstracts : 460-461, 1995.

Kawakami, Y., Fukunaga, T. Knee joint angles and muscle-fiber length of vastus lateralis in humans. 40th MTG of American College of Sports Medicine, Med. Sci. Sports Exerc. 26: S194, 1994.

Kawakami, Y., Abe, T., Kuno, S., Fukunaga, T. Changes in muscle architecture as a result of resistance training. XIVth Congress of the International Society of Biomechanics; Book of Abstracts : 668-669, 1993.

Kawakami, Y., Nakazawa, K., Fukunaga, T., Miyashita. M. Analysis of musculature in human elbow flexors and extensors using magnetic resonance imaging. XIIIth Congress of the International Society of Biomechanics; Book of Abstracts : 359-361, 1991.

Kawakami, Y., Fukunaga, T., Kanehisa, H., Miyashita. M. Some factors affecting eccentric contraction strength. XIIth Congress of the International Society of Biomechanics; Book of Abstracts : 330, 1989.