Passive hamstring stiffness varies proximo-distally, resulting in inhomogeneous tissue strain during stretching that may affect localized adaptations and risk of muscle injuries. The purpose of the present study was to determine the acute and chronic effects of static stretching (SS) on intramuscular hamstring stiffness. Thirty healthy active participants had acute changes in passive biceps femoris (BF), semimembranosus (SM), and semitendinosus (ST) stiffness measured at 25% (proximal), 50% (middle), and 75% (distal) muscle length, using shear-wave elastography, immediately after SS. Participants then completed 4 weeks of either a SS intervention (n = 15) or no intervention (CON, n = 15) with stiffness measured before and after the interventions. The acute and chronic effects of SS were compared between anatomical regions and between regions on the basis of their relative stiffness pre-intervention. Acutely, SS decreased stiffness throughout the BF and SM (p <= 0.05) but not the ST (p = 0.326). However, a regional effect of stretching was observed for SM and ST with greater reduction in stiffness occurring in stiffer muscular regions (p = 0.001-0.013). Chronically, SS increased BF and ST (p < 0.05), but not SM (p = 0.422) stiffness compared with CON, but no regional effect of stretching was observed in any muscle (p = 0.361-0.833). SS resulted in contrasting acute and chronic effects, acutely decreasing stiffness in stiffer regions while chronically increasing stiffness. These results indicate that the acute effects of SS vary along the muscle's length on the basis of the relative stiffness of the muscle and that acute changes in stiffness from SS are unrelated to chronic adaptations.
机构:
Kobe Int Univ, Fac Rehabil, Dept Phys Therapy, Kobe, Hyogo, Japan
Kobe Int Univ, Fac Rehabil, 9-1-6 Koyocho naka,Higashinada ku, Kobe, Hyogo 6580032, JapanKobe Int Univ, Fac Rehabil, Dept Phys Therapy, Kobe, Hyogo, Japan
Takeuchi, Kosuke
Nakamura, Masatoshi
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Nishi Kyushu Univ, Fac Rehabil Sci, Dept Phys Therapy, Kanzaki, Saga, JapanKobe Int Univ, Fac Rehabil, Dept Phys Therapy, Kobe, Hyogo, Japan
Nakamura, Masatoshi
Fukaya, Taizan
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Josai Int Univ, Fac Social Work Studies, Dept Phys Therapy, Togane, Chiba, JapanKobe Int Univ, Fac Rehabil, Dept Phys Therapy, Kobe, Hyogo, Japan
Fukaya, Taizan
Konrad, Andreas
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Graz Univ, Inst Human Movement Sci Sport & Hlth, Graz, AustriaKobe Int Univ, Fac Rehabil, Dept Phys Therapy, Kobe, Hyogo, Japan
Konrad, Andreas
Mizuno, Takamasa
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Nagoya Univ, Res Ctr Hlth Phys Fitness & Sports, Nagoya, Aichi, JapanKobe Int Univ, Fac Rehabil, Dept Phys Therapy, Kobe, Hyogo, Japan
机构:
Kyoto Univ, Grad Sch Med, Human Hlth Sci, Kyoto 6068507, JapanKyoto Univ, Grad Sch Med, Human Hlth Sci, Kyoto 6068507, Japan
Umegaki, Hiroki
Ikezoe, Tome
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Kyoto Univ, Grad Sch Med, Human Hlth Sci, Kyoto 6068507, JapanKyoto Univ, Grad Sch Med, Human Hlth Sci, Kyoto 6068507, Japan
Ikezoe, Tome
Nakamura, Masatoshi
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Kyoto Univ, Grad Sch Med, Human Hlth Sci, Kyoto 6068507, Japan
Doshisha Univ, Fac Hlth & Sports Sci, Kyoto 602, JapanKyoto Univ, Grad Sch Med, Human Hlth Sci, Kyoto 6068507, Japan
Nakamura, Masatoshi
Nishishita, Satoru
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Kyoto Univ, Grad Sch Med, Human Hlth Sci, Kyoto 6068507, JapanKyoto Univ, Grad Sch Med, Human Hlth Sci, Kyoto 6068507, Japan
Nishishita, Satoru
Kobayashi, Takuya
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Kyoto Univ, Grad Sch Med, Human Hlth Sci, Kyoto 6068507, JapanKyoto Univ, Grad Sch Med, Human Hlth Sci, Kyoto 6068507, Japan
Kobayashi, Takuya
Fujita, Kosuke
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Kyoto Univ, Grad Sch Med, Human Hlth Sci, Kyoto 6068507, JapanKyoto Univ, Grad Sch Med, Human Hlth Sci, Kyoto 6068507, Japan
Fujita, Kosuke
Tanaka, Hiroki
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Kyoto Univ, Grad Sch Med, Human Hlth Sci, Kyoto 6068507, JapanKyoto Univ, Grad Sch Med, Human Hlth Sci, Kyoto 6068507, Japan
Tanaka, Hiroki
Ichihashi, Noriaki
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Kyoto Univ, Grad Sch Med, Human Hlth Sci, Kyoto 6068507, JapanKyoto Univ, Grad Sch Med, Human Hlth Sci, Kyoto 6068507, Japan
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Karl Franzens Univ Graz, Inst Human Movement Sci Sport & Hlth, Graz, AustriaKarl Franzens Univ Graz, Inst Human Movement Sci Sport & Hlth, Graz, Austria
Reiner, Marina Maren
Tilp, Markus
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Karl Franzens Univ Graz, Inst Human Movement Sci Sport & Hlth, Graz, AustriaKarl Franzens Univ Graz, Inst Human Movement Sci Sport & Hlth, Graz, Austria
Tilp, Markus
Guilhem, Gael
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French Inst Sport INSEP, Lab Sport Expertise & Performance, Paris, FranceKarl Franzens Univ Graz, Inst Human Movement Sci Sport & Hlth, Graz, Austria
Guilhem, Gael
Morales-Artacho, Antonio
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French Inst Sport INSEP, Lab Sport Expertise & Performance, Paris, FranceKarl Franzens Univ Graz, Inst Human Movement Sci Sport & Hlth, Graz, Austria
Morales-Artacho, Antonio
Konrad, Andreas
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Karl Franzens Univ Graz, Inst Human Movement Sci Sport & Hlth, Graz, AustriaKarl Franzens Univ Graz, Inst Human Movement Sci Sport & Hlth, Graz, Austria
机构:
Natl Rehabil Ctr Persons Disabil, Res Inst, Dept Rehabil Movement Funct, Motor Control Sect, Tokorozawa, Saitama, JapanNatl Rehabil Ctr Persons Disabil, Res Inst, Dept Rehabil Movement Funct, Motor Control Sect, Tokorozawa, Saitama, Japan
Hobara, Hiroaki
Inoue, Koh
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Waseda Univ, Grad Sch Human Sci, Tokorozawa, Saitama, JapanNatl Rehabil Ctr Persons Disabil, Res Inst, Dept Rehabil Movement Funct, Motor Control Sect, Tokorozawa, Saitama, Japan
Inoue, Koh
Kato, Emika
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Natl Rehabil Ctr Persons Disabil, Res Inst, Dept Rehabil Movement Funct, Motor Control Sect, Tokorozawa, Saitama, JapanNatl Rehabil Ctr Persons Disabil, Res Inst, Dept Rehabil Movement Funct, Motor Control Sect, Tokorozawa, Saitama, Japan
Kato, Emika
Kanosue, Kazuyuki
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机构:
Waseda Univ, Fac Sport Sci, Tokorozawa, Saitama, JapanNatl Rehabil Ctr Persons Disabil, Res Inst, Dept Rehabil Movement Funct, Motor Control Sect, Tokorozawa, Saitama, Japan