{"id":2417,"date":"2026-05-09T13:14:33","date_gmt":"2026-05-09T04:14:33","guid":{"rendered":"https:\/\/www.waseda.jp\/fsps\/rcsports\/?p=2417"},"modified":"2026-05-09T13:14:33","modified_gmt":"2026-05-09T04:14:33","slug":"%e9%bc%a0%e5%be%84%e9%83%a8%e7%97%9b%e3%81%ae%e6%97%a2%e5%be%80%e6%ad%b4%e3%82%92%e6%9c%89%e3%81%99%e3%82%8b%e3%82%a2%e3%82%b9%e3%83%aa%e3%83%bc%e3%83%88%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e6%96%b9-4","status":"publish","type":"post","link":"https:\/\/www.waseda.jp\/fsps\/rcsports\/news\/2026\/05\/09\/2417\/","title":{"rendered":"\u30cf\u30e0\u30b9\u30c8\u30ea\u30f3\u30b0\u30b9\u7b49\u5c3a\u6027\u304a\u3088\u3073\u4f38\u5f35\u6027\u53ce\u7e2e\u4e2d\u306b\u304a\u3051\u308b\u7b4b\u5185\u30fb\u7b4b\u9593\u306e\u529b\u5b66\u7684\u7279\u6027\u306e\u5206\u5e03-Intra- and intermuscular shear wave speed distributions in the human hamstrings during isometric and eccentric contractions"},"content":{"rendered":"<h2 style=\"text-align: center;\">\u30cf\u30e0\u30b9\u30c8\u30ea\u30f3\u30b0\u30b9\u7b49\u5c3a\u6027\u304a\u3088\u3073\u4f38\u5f35\u6027\u53ce\u7e2e\u4e2d\u306b\u304a\u3051\u308b\u7b4b\u5185\u30fb\u7b4b\u9593\u306e\u529b\u5b66\u7684\u7279\u6027\u306e\u5206\u5e03<\/h2>\n<p style=\"text-align: center;\">Intra- and intermuscular shear wave speed distributions in the human hamstrings during isometric and eccentric contractions<\/p>\n<h3>\u6982\u8981<\/h3>\n<p>\u30cf\u30e0\u30b9\u30c8\u30ea\u30f3\u30b0\u30b9<sup>\u203b1<\/sup>\u306e\u8089\u96e2\u308c\u306f\u5927\u817f\u4e8c\u982d\u7b4b\u9577\u982d\u306e\u8fd1\u4f4d\u90e8\uff08\u4e0a\u90e8\uff09\u3067\u597d\u767a\u3059\u308b\u3053\u3068\u304c\u77e5\u3089\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u305d\u306e\u8981\u56e0\u306f\u660e\u3089\u304b\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u672c\u7814\u7a76\u3067\u306f\u300115\u540d\u306e\u5065\u5e38\u6210\u4eba\u7537\u6027\u3092\u5bfe\u8c61\u306b\u3001\u8d85\u97f3\u6ce2\u526a\u65ad\u6ce2\u30a8\u30e9\u30b9\u30c8\u30b0\u30e9\u30d5\u30a3\u3092\u7528\u3044\u3066\u526a\u65ad\u6ce2\u4f1d\u64ad\u901f\u5ea6\uff08shear wave speed, m\/s\uff09\u3092\u8a08\u6e2c\u3057\u3001\u30cf\u30e0\u30b9\u30c8\u30ea\u30f3\u30b0\u30b9\uff08\u5927\u817f\u4e8c\u982d\u7b4b\u9577\u982d\u3001\u534a\u8171\u69d8\u7b4b\uff09\u306e\u5404\u90e8\u4f4d\u304c\u6700\u5927\u4e0b\u5f37\u5ea6\u306e\u7b49\u5c3a\u6027\u53ce\u7e2e<sup>\u203b2<\/sup>\u304a\u3088\u3073\u4f38\u5f35\u6027\u53ce\u7e2e<sup>\u203b3<\/sup>\u4e2d\u306b\u3069\u306e\u3088\u3046\u306a\u529b\u5b66\u7684\u5fdc\u7b54\u3092\u793a\u3059\u304b\u3092\u691c\u8a0e\u3057\u307e\u3057\u305f\u3002\u305d\u306e\u7d50\u679c\u3001\u5927\u817f\u4e8c\u982d\u7b4b\u9577\u982d\u306e\u8fd1\u4f4d\u90e8\u306f\u4e2d\u9593\u90e8\u306b\u6bd4\u3079\u3066\u5fdc\u7b54\u304c\u5c0f\u3055\u304f\uff08\uff1d\u7b4b\u5185\u3067\u4f38\u9577\u3078\u306e\u62b5\u6297\u6027\u304c\u4e0d\u5747\u4e00\uff09\u3001\u96a3\u63a5\u3059\u308b\u534a\u8171\u69d8\u7b4b\u306f\u7b4b\u9577\u306b\u6cbf\u3063\u3066\u5747\u4e00\u306a\u5fdc\u7b54\uff08\uff1d\u7b4b\u5185\u3067\u4f38\u9577\u3078\u306e\u62b5\u6297\u6027\u304c\u5747\u4e00\uff09\u3092\u793a\u3057\u307e\u3057\u305f\u3002\u3053\u306e\u3088\u3046\u306a\u5dee\u7570\u306f\u30cf\u30e0\u30b9\u30c8\u30ea\u30f3\u30b0\u30b9\u306e\u53d7\u52d5\u7684\u306a\u529b\u5b66\u7684\u7279\u6027\u306e\u5f71\u97ff\u3092\u53cd\u6620\u3057\u3066\u3044\u308b\u3068\u8003\u3048\u3089\u308c\u3001\u7279\u5b9a\u306e\u90e8\u4f4d\u3067\u8089\u96e2\u308c\u304c\u751f\u3058\u3084\u3059\u3044\u8981\u56e0\u3092\u89e3\u660e\u3059\u308b\u4e0a\u3067\u6709\u7528\u306a\u77e5\u898b\u3068\u306a\u308b\u3068\u8003\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n<p>Professor Yasuo Kawakami (Faculty of Sport Sciences, Waseda University, Japan), along with Dr. Pavlos E. Evangelidis (University of Exeter, UK) and other coauthors, has published new research findings in the <em>European Journal of Applied Physiology<\/em>. The article, titled \u201cIntra- and intermuscular shear wave speed distributions in the human hamstrings during isometric and eccentric contractions,\u201d was published on September 18, 2025.<\/p>\n<p>\u65e9\u7a32\u7530\u5927\u5b66\u30b9\u30dd\u30fc\u30c4\u79d1\u5b66\u5b66\u8853\u9662\u306e\u5ddd\u4e0a\u6cf0\u96c4\u6559\u6388\u3001University of Exeter \uff08\u30a8\u30af\u30bb\u30bf\u30fc\u5927\u5b66\uff09\u306ePavlos E. Evangelidis\uff08\u30d1\u30d6\u30ed\u30b9\u30fb\u30a8\u30f4\u30a1\u30f3\u30b8\u30a7\u30ea\u30c7\u30a3\u30b9\uff09\u7814\u7a76\u54e1\u3089\u306e\u7814\u7a76\u30b0\u30eb\u30fc\u30d7\u306b\u3088\u308b\u7814\u7a76\u6210\u679c\u304c\u3001\u300eEuropean Journal of Applied Physiology\u300f\u306b\u63b2\u8f09\u3055\u308c\u307e\u3057\u305f\u3002\uff08\u8ad6\u6587\u30bf\u30a4\u30c8\u30eb\uff1aIntra- and intermuscular shear wave speed distributions in the human hamstrings during isometric and eccentric contractions \u3001\u63b2\u8f09\u65e5\uff1a2025\u5e749\u670818\u65e5\uff09<\/p>\n<p>Hamstring strain injuries often occur near the upper biceps femoris long head muscle, but the reasons remain unclear. This study examined how different regions of the hamstrings respond to force during static (isometric) and lengthening (eccentric) submaximal voluntary contractions using ultrasound shear wave elastography in 15 young, healthy men. Researchers \u00a0found that the upper biceps femoris showed weaker responses than the middle region, while the neighboring semitendinosus muscle maintained a more balanced response along its length. These differences, which appear to be influenced by the passive mechanical properties of the hamstring muscles, may help explain why certain areas of the hamstrings are more prone to injury.<\/p>\n<h3>\u3053\u308c\u307e\u3067\u306e\u7814\u7a76\u3067\u5206\u304b\u3063\u3066\u3044\u305f\u3053\u3068\uff08\u79d1\u5b66\u53f2\u7684\u30fb\u6b74\u53f2\u7684\u306a\u80cc\u666f\u306a\u3069\uff09<\/h3>\n<p>\u30cf\u30e0\u30b9\u30c8\u30ea\u30f3\u30b0\u30b9\u306e\u8089\u96e2\u308c\u306f\u3001\u30b9\u30dd\u30fc\u30c4\u50b7\u5bb3\u306e\u4e2d\u3067\u3082\u6700\u3082\u983b\u767a\u3059\u308b\u50b7\u5bb3\u306e\u4e00\u3064\u3067\u3042\u308a\u3001\u7279\u306b\u5927\u817f\u4e8c\u982d\u7b4b\u9577\u982d\u306e\u8fd1\u4f4d\u90e8\u3067\u597d\u767a\u3059\u308b\u3053\u3068\u304c\u77e5\u3089\u308c\u3066\u3044\u307e\u3059\u3002\u5148\u884c\u7814\u7a76\u3067\u306f\u3001\u7b4b\u5185\u304a\u3088\u3073\u7b4b\u9593\u306b\u304a\u3051\u308b\u529b\u5b66\u7684\u7279\u6027\u306e\u4e0d\u5747\u4e00\u6027\u304c\u5c40\u6240\u7684\u306a\u529b\u5b66\u7684\u8ca0\u8377\u306e\u767a\u751f\u306b\u95a2\u4e0e\u3059\u308b\u3053\u3068\u304c\u793a\u5506\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u640d\u50b7\u767a\u751f\u3068\u6700\u3082\u95a2\u9023\u306e\u5f37\u3044\u53ce\u7e2e\u69d8\u5f0f\u3067\u3042\u308b\u4f38\u5f35\u6027\u53ce\u7e2e\u4e2d\u306b\u3001\u305d\u3046\u3057\u305f\u529b\u5b66\u7684\u7279\u6027\u306e\u4e0d\u5747\u4e00\u6027\u3092\u4f53\u7cfb\u7684\u306b\u691c\u8a0e\u3057\u305f\u7814\u7a76\u306f\u3053\u308c\u307e\u3067\u884c\u308f\u308c\u3066\u3044\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n<p>Hamstring strain injuries are among the most common sports injuries, often occurring in the upper biceps femoris long head muscle. Previous studies have suggested that unequal mechanical properties within and between muscles may contribute to localized strain, but this had not been systematically studied under eccentric (lengthening) loading, which is most relevant to injury occurrence.<\/p>\n<p>&nbsp;<\/p>\n<h3>\u4eca\u56de\u306e\u7814\u7a76\u3067\u65b0\u305f\u306b\u5b9f\u73fe\u3057\u3088\u3046\u3068\u3057\u305f\u3053\u3068\u3001\u660e\u3089\u304b\u306b\u306a\u3063\u305f\u3053\u3068<\/h3>\n<ul>\n<li>\u5927\u817f\u4e8c\u982d\u7b4b\u9577\u982d\u306f\u3001\u7b49\u5c3a\u6027\u304a\u3088\u3073\u4f38\u5f35\u6027\u53ce\u7e2e\u306e\u3044\u305a\u308c\u306e\u53ce\u7e2e\u69d8\u5f0f\u306b\u304a\u3044\u3066\u3082\u3001\u4e00\u8cab\u3057\u3066\u4e0d\u5747\u4e00\u306a\u529b\u5b66\u7684\u5fdc\u7b54\uff08\u526a\u65ad\u6ce2\u4f1d\u64ad\u901f\u5ea6\uff1a\u8fd1\u4f4d\u90e8\uff1c\u9060\u4f4d\u90e8\uff09\u3092\u793a\u3057\u307e\u3057\u305f\u3002<\/li>\n<li>\u534a\u8171\u69d8\u7b4b\u306f\u3001\u7b49\u5c3a\u6027\u53ce\u7e2e\u4e2d\u306b\u306e\u307f\u529b\u5b66\u7684\u5fdc\u7b54\u306e\u4e0d\u5747\u4e00\u6027\u3092\u793a\u3057\u307e\u3057\u305f\u3002<\/li>\n<li>\u5b89\u9759\u6642\u306e\u53d7\u52d5\u7684\u306a\u529b\u5b66\u7684\u7279\u6027\u3092\u8003\u616e\u3059\u308b\u3068\u3001\u4f38\u5f35\u6027\u53ce\u7e2e\u4e2d\u306b\u306f\u7b4b\u5185\u306e\u529b\u5b66\u7684\u5fdc\u7b54\u306e\u4e0d\u5747\u4e00\u6027\u306f\u6d88\u5931\u3057\u307e\u3057\u305f\u304c\u3001\u4f4e\u5f37\u5ea6\u306e\u7b49\u5c3a\u6027\u53ce\u7e2e\u4e2d\u306b\u306f\u4f9d\u7136\u3068\u3057\u3066\u4e0d\u5747\u4e00\u6027\u304c\u307f\u3089\u308c\u307e\u3057\u305f\u3002<\/li>\n<li>\u5927\u817f\u4e8c\u982d\u7b4b\u9577\u982d\u3068\u534a\u8171\u69d8\u7b4b\u306e\u9593\u3067\u306e\u76f8\u5bfe\u7684\u306a\u5fdc\u7b54\u306f\u3001\u5b89\u9759\u6642\u304a\u3088\u3073\u4f4e\u5f37\u5ea6\u3067\u306e\u53ce\u7e2e\u4e2d\u306b\u306f\u8fd1\u4f4d\u90e8\u3067\u5c0f\u3055\u304f\u306a\u308a\u307e\u3057\u305f\u304c\u3001\u53ce\u7e2e\u5f37\u5ea6\u306e\u5897\u52a0\u306b\u4f34\u3044\u3088\u308a\u5747\u8861\u3057\u305f\u305f\u3081\u3001\u529b\u767a\u63ee\u306e\u52aa\u529b\u6c34\u6e96\u306e\u4e0a\u6607\u306b\u4f34\u3063\u3066\u4e21\u7b4b\u9593\u306e\u8ca0\u8377\u30d0\u30e9\u30f3\u30b9\u304c\u5747\u7b49\u5316\u3059\u308b\u3053\u3068\u304c\u793a\u5506\u3055\u308c\u307e\u3057\u305f\u3002<\/li>\n<li>\u7b4b\u69cb\u9020\u306f\u3001\u4f38\u5f35\u6027\u53ce\u7e2e\u4e2d\u306b\u306e\u307f\u5927\u817f\u4e8c\u982d\u7b4b\u9577\u982d\u8fd1\u4f4d\u90e8\u306e\u529b\u5b66\u7684\u7279\u6027\u3068\u306e\u95a2\u9023\u3092\u793a\u3057\u307e\u3057\u305f\u3002<\/li>\n<li>The upper biceps femoris long head muscle consistently showed lower response to load bearing than its mid-region during both static (isometric) and lengthening (eccentric) contractions.<\/li>\n<li>The semitendinosus showed regional differences only during isometric contractions.<\/li>\n<li>When passive mechanical properties at rest were accounted for, intramuscular differences disappeared during eccentric loading but remained during low-intensity isometric contractions.<\/li>\n<li>The relative response between the two hamstring muscles (biceps femoris long head vs. semitendinosus) was lower in the upper region at rest and during low-intensity contractions, but became more balanced at higher intensities, suggesting more even load sharing between the muscles as effort increases.<\/li>\n<li>Muscle architecture correlated with upper biceps femoris long head mechanical properties only during eccentric contractions.<\/li>\n<\/ul>\n<h3>\u305d\u306e\u305f\u3081\u306b\u65b0\u3057\u304f\u958b\u767a\u3057\u305f\u624b\u6cd5<\/h3>\n<p>\u6211\u3005\u306e\u7814\u7a76\u30b0\u30eb\u30fc\u30d7\u306f\u3001\u8d85\u97f3\u6ce2\u526a\u65ad\u6ce2\u30a8\u30e9\u30b9\u30c8\u30b0\u30e9\u30d5\u30a3\u3092\u7528\u3044\u3066\u7570\u306a\u308b\u5f37\u5ea6\u3067\u306e\u968f\u610f\u7684\u306a\u7b49\u5c3a\u6027\u304a\u3088\u3073\u4f38\u5f35\u6027\u53ce\u7e2e\u4e2d\u306b\u304a\u3051\u308b\u7b4b\u306e\u5c40\u6240\u7684\u306a\u529b\u5b66\u7684\u7279\u6027\u3092\u8a55\u4fa1\u3059\u308b\u65b9\u6cd5\u3092\u78ba\u7acb\u3057\u3066\u304a\u308a\u3001\u672c\u7814\u7a76\u3067\u306f\u30cf\u30e0\u30b9\u30c8\u30ea\u30f3\u30b0\u30b9\u306e\u529b\u5b66\u7684\u7279\u6027\u3092\u7a7a\u9593\u7684\u30fb\u6a5f\u80fd\u7684\u5074\u9762\u304b\u3089\u8a73\u7d30\u306b\u89e3\u6790\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>The study applied ultrasound shear wave elastography to assess local muscle mechanical properties in humans during controlled isometric and eccentric voluntary contractions at varying intensities, enabling a detailed spatial and functional analysis of hamstring mechanics.<\/p>\n<h3>\u7814\u7a76\u306e\u6ce2\u53ca\u52b9\u679c\u3084\u793e\u4f1a\u7684\u5f71\u97ff<\/h3>\n<p>\u672c\u7814\u7a76\u306f\u3001\u30cf\u30e0\u30b9\u30c8\u30ea\u30f3\u30b0\u30b9\u306e\u8089\u96e2\u308c\u304c\u7279\u5b9a\u90e8\u4f4d\u3067\u597d\u767a\u3059\u308b\u8981\u56e0\u306e\u7406\u89e3\u3092\u6df1\u3081\u308b\u3082\u306e\u3067\u3059\u3002\u30cf\u30e0\u30b9\u30c8\u30ea\u30f3\u30b0\u30b9\u306e\u4e2d\u3067\u3088\u308a\u5927\u304d\u306a\u6a5f\u68b0\u7684\u30b9\u30c8\u30ec\u30b9\u3092\u53d7\u3051\u308b\u90e8\u4f4d\u3092\u7279\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u30a2\u30b9\u30ea\u30fc\u30c8\u306e\u50b7\u5bb3\u4e88\u9632\u30d7\u30ed\u30b0\u30e9\u30e0\u3084\u30ea\u30cf\u30d3\u30ea\u30c6\u30fc\u30b7\u30e7\u30f3\u65b9\u7565\u306e\u7acb\u6848\u3001\u3055\u3089\u306b\u306f\u30b9\u30dd\u30fc\u30c4\u50b7\u5bb3\u306e\u767a\u751f\u7387\u4f4e\u6e1b\u306b\u5bc4\u4e0e\u3059\u308b\u53ef\u80fd\u6027\u304c\u793a\u5506\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>This research advances the understanding of why hamstring injuries frequently occur at specific sites. By identifying regions of the hamstring muscles that are under greater stress, the findings could inform evidence-based prevention programs for athletes, reduce sports-related injury rates, and improve rehabilitation strategies.<\/p>\n<h3>\u4eca\u5f8c\u306e\u8ab2\u984c<\/h3>\n<p>\u4eca\u5f8c\u306e\u7814\u7a76\u3067\u306f\u3001\u4eca\u56de\u89b3\u5bdf\u3055\u308c\u305f\u4f4e\u30fb\u4e2d\u5f37\u5ea6\u3067\u306e\u529b\u5b66\u7684\u5fdc\u7b54\u306e\u4e0d\u5747\u4e00\u6027\u304c\u3001\u30b9\u30d7\u30ea\u30f3\u30c8\u52d5\u4f5c\u3042\u308b\u3044\u306f\u7af6\u6280\u7279\u7570\u7684\u306a\u52d5\u4f5c\u306b\u304a\u3044\u3066\u3082\u751f\u3058\u308b\u304b\u3092\u691c\u8a3c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u3053\u308c\u3089\u306e\u4e0d\u5747\u4e00\u6027\u306b\u5bfe\u3057\u3066\u3001\u7b4b\u6d3b\u52d5\u30d1\u30bf\u30fc\u30f3\u3001\u7b4b\u69cb\u9020\u3001\u7b4b\u75b2\u52b4\u306a\u3069\u306e\u8981\u56e0\u304c\u3069\u306e\u3088\u3046\u306b\u95a2\u4e0e\u3057\u3066\u3044\u308b\u304b\u3001\u3055\u3089\u306b\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u306b\u3088\u3063\u3066\u3088\u308a\u5747\u4e00\u306a\u529b\u5b66\u7684\u5fdc\u7b54\u3092\u4fc3\u3059\u3053\u3068\u304c\u53ef\u80fd\u304b\u3092\u660e\u3089\u304b\u306b\u3059\u308b\u3053\u3068\u3082\u91cd\u8981\u3067\u3059\u3002\u52a0\u3048\u3066\u3001\u6027\u5225\u30fb\u5e74\u9f62\u30fb\u904b\u52d5\u6b74\u306a\u3069\u306e\u7570\u306a\u308b\u96c6\u56e3\u3092\u5bfe\u8c61\u306b\u691c\u8a0e\u3092\u62e1\u5927\u3059\u308b\u3053\u3068\u3067\u3001\u3053\u308c\u3089\u306e\u30d1\u30bf\u30fc\u30f3\u304c\u666e\u904d\u7684\u306a\u3082\u306e\u304b\u3001\u307e\u305f\u50b7\u5bb3\u4e88\u9632\u3068\u306e\u95a2\u9023\u3092\u660e\u3089\u304b\u306b\u3059\u308b\u3053\u3068\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<p>Future studies should investigate whether the regional imbalances observed at low to moderate intensities also occur during high-speed or sport-specific movements such as sprinting. It will also be important to examine how factors like muscle activation patterns, architecture, and fatigue contribute to these imbalances, and whether targeted training can promote more uniform mechanical responses across the hamstrings. Expanding to larger and more diverse populations will clarify whether these patterns are consistent across sex, age, and athletic background, and how they relate to injury prevention.<\/p>\n<h3>\u7814\u7a76\u8005\u306e\u30b3\u30e1\u30f3\u30c8<\/h3>\n<p>\u30cf\u30e0\u30b9\u30c8\u30ea\u30f3\u30b0\u30b9\u306e\u8089\u96e2\u308c\u306f\u3001\u30b9\u30d7\u30ea\u30f3\u30c8\u52d5\u4f5c\u3092\u4f34\u3046\u30b9\u30dd\u30fc\u30c4\u306b\u53d6\u308a\u7d44\u3080\u30a2\u30b9\u30ea\u30fc\u30c8\u3084\u4e00\u822c\u4eba\u306b\u3068\u3063\u3066\u9577\u671f\u7684\u306a\u5f71\u97ff\u3092\u53ca\u307c\u3059\u53ef\u80fd\u6027\u304c\u3042\u308b\u50b7\u5bb3\u3067\u3059\u3002\u672c\u7814\u7a76\u3067\u306f\u3001\u30cf\u30e0\u30b9\u30c8\u30ea\u30f3\u30b0\u30b9\u306b\u304a\u3051\u308b\u90e8\u4f4d\u7279\u7570\u7684\u306a\u529b\u5b66\u7684\u5fdc\u7b54\u3092\u660e\u3089\u304b\u306b\u3057\u3001\u7279\u5b9a\u306e\u90e8\u4f4d\u304c\u640d\u50b7\u3057\u3084\u3059\u3044\u8981\u56e0\u3092\u8aac\u660e\u3057\u5f97\u308b\u300c\u529b\u5b66\u7684\u306a\u5f31\u70b9\uff08mechanical weak spots\uff09\u300d\u306e\u5b58\u5728\u3092\u793a\u3057\u307e\u3057\u305f\u3002\u672c\u7814\u7a76\u306e\u6210\u679c\u304c\u3001\u50b7\u5bb3\u4e88\u9632\u3092\u76ee\u7684\u3068\u3057\u305f\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u65b9\u7565\u306e\u7acb\u6848\u3084\u5b9f\u8df5\u306b\u8cc7\u3059\u308b\u3053\u3068\u3067\u3001\u53d7\u50b7\u30ea\u30b9\u30af\u306e\u4f4e\u6e1b\u306b\u3064\u306a\u304c\u308b\u3053\u3068\u3092\u671f\u5f85\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>Pavlos E. Evangelidis: Hamstring strain injuries can have lasting effects on athletes and physically active individuals involved in high-speed running sports. By showing that certain regions of the hamstrings respond differently under load, our study highlights \u2018mechanical weak spots\u2019 that may explain why some areas are more prone to injury. I hope these findings will help inform training and prevention strategies and contribute to lowering the risk of such injuries.<\/p>\n<h3>\u7528\u8a9e\u89e3\u8aac<\/h3>\n<p>\u203b1 \u30cf\u30e0\u30b9\u30c8\u30ea\u30f3\u30b0\u30b9<\/p>\n<p>\u5927\u817f\u5f8c\u9762\u306b\u4f4d\u7f6e\u3059\u308b\u5927\u817f\u4e8c\u982d\u7b4b\uff08\u9577\u982d\u30fb\u77ed\u982d\uff09\u3001\u534a\u8171\u69d8\u7b4b\u3001\u534a\u819c\u69d8\u7b4b\u306e3\u3064\u306e\u7b4b\u306e\u7dcf\u79f0\u3002\u4e3b\u306b\u819d\u95a2\u7bc0\u3092\u66f2\u3052\u308b\u969b\u306b\u8ca2\u732e\u3057\u3001\u30b9\u30d7\u30ea\u30f3\u30c8\u8d70\u52d5\u4f5c\u306a\u3069\u3067\u8089\u96e2\u308c\u304c\u597d\u767a\u3059\u308b\u90e8\u4f4d\u3067\u3042\u308b\u3002<\/p>\n<p>\u203b2 \u7b49\u5c3a\u6027\u53ce\u7e2e<\/p>\n<p>\u7b4b\u9577\u304c\u5909\u5316\u3057\u306a\u3044\u72b6\u614b\u3067\u529b\u3092\u767a\u63ee\u3059\u308b\u53ce\u7e2e\u69d8\u5f0f\u3002<\/p>\n<p>\u203b3 \u4f38\u5f35\u6027\u53ce\u7e2e<\/p>\n<p>\u7b4b\u304c\u4f38\u3055\u308c\u306a\u304c\u3089\u529b\u3092\u767a\u63ee\u3059\u308b\u53ce\u7e2e\u69d8\u5f0f\u3002\u95a2\u7bc0\u904b\u52d5\u3092\u4f34\u3044\u3001\u7b4b\u8089\u75db\u3084\u8089\u96e2\u308c\u3092\u5f15\u304d\u8d77\u3053\u3057\u3084\u3059\u3044\u3002<\/p>\n<h3><strong>\u8ad6\u6587\u60c5\u5831<\/strong><\/h3>\n<p>\u96d1\u8a8c\u540d\uff0fJournal\uff1aEuropean Journal of Applied Physiology<\/p>\n<p>\u8ad6\u6587\u540d\uff0fTitle\uff1aIntra- and intermuscular shear wave speed distributions in the human hamstrings during isometric and eccentric contractions<\/p>\n<p>\u57f7\u7b46\u8005\u540d\u30fb\u6240\u5c5e\u6a5f\u95a2\u540d\uff0fAuthors and Affiliated Organization\uff1a<\/p>\n<p><strong>Authors:<\/strong> Pavlos E. Evangelidis<sup>1,2,3<\/sup>, Chi Yang<sup>4<\/sup>, Hoshizora Ichinose<sup>4,5<\/sup>, Paul Newell<sup>3<\/sup>, Yasuo Kawakami<sup>1,6<\/sup><\/p>\n<p><strong>Affiliations:<\/strong><\/p>\n<p><sup>1 <\/sup>Faculty of Sport Sciences, Waseda University, Japan<\/p>\n<p><sup>2 <\/sup>Japan Society for the Promotion of Science, Japan<\/p>\n<p><sup>3 <\/sup>Public Health and Sport Science, Medical School, Faculty of Health and Life Sciences, University of Exeter, Exeter, United Kingdom<\/p>\n<p><sup>4 <\/sup>Graduate School of Sport Sciences, Waseda University, Japan<\/p>\n<p><sup>5 <\/sup>Faculty of Sport &amp; Health Science, Ritsumeikan University, Japan<\/p>\n<p><sup>6 <\/sup>Human Performance Laboratory, Waseda University, Japan<\/p>\n<p>&nbsp;<\/p>\n<p>Publishing Date\uff08Local Time\uff09\uff1a18 September 2025<\/p>\n<p>Publishing Date\uff08Japan Time\uff09\uff1a18 September 2025<\/p>\n<p>\uff08\u30aa\u30f3\u30e9\u30a4\u30f3\u63b2\u8f09\u306e\u5834\u5408\uff0fFor online publication\uff09<\/p>\n<p>URL\uff1a<a href=\"https:\/\/link.springer.com\/article\/10.1007\/s00421-025-05968-y#citeas\">https:\/\/link.springer.com\/article\/10.1007\/s00421-025-05968-y#citeas<\/a><\/p>\n<p>DOI\uff1a<a href=\"https:\/\/doi.org\/10.1007\/s00421-025-05968-y\">https:\/\/doi.org\/10.1007\/s00421-025-05968-y<\/a><\/p>\n<h3><strong>\u7814\u7a76\u52a9\u6210<\/strong><\/h3>\n<p>\u7814\u7a76\u8cbb\u540d\uff1a\u65e5\u672c\u5b66\u8853\u632f\u8208\u4f1a\u00a0\u00a0\u79d1\u5b66\u7814\u7a76\u8cbb\u52a9\u6210\u4e8b\u696d\u00a0\u00a0\u7279\u5225\u7814\u7a76\u54e1\u5968\u52b1\u8cbb [7F17412]<\/p>\n<p>\u7814\u7a76\u8ab2\u984c\u540d\uff1a\u30cf\u30e0\u30b9\u30c8\u30ea\u30f3\u30b0\u30b9\u306e\u53ce\u7e2e\u4e2d\u30b9\u30c8\u30ec\u30b9\u5206\u5e03\u306e\u89e3\u6790\uff1a\u30b9\u30dd\u30fc\u30c4\u306b\u304a\u3051\u308b\u8089\u96e2\u308c\u3068\u306e\u95a2\u9023\u6027<\/p>\n<p>\u7814\u7a76\u4ee3\u8868\u8005\uff08\u53d7\u5165\u7814\u7a76\u8005\uff09\u30fb\u6240\u5c5e\u6a5f\u95a2\u540d\uff1a\u5ddd\u4e0a\u6cf0\u96c4\uff08\u65e9\u7a32\u7530\u5927\u5b66\uff09<\/p>\n<p>\u7814\u7a76\u5206\u62c5\u8005\uff08\u5916\u56fd\u4eba\u7279\u5225\u7814\u7a76\u54e1\uff09\u30fb\u6240\u5c5e\u6a5f\u95a2\u540d\uff1aPavlos E. Evangelidis\uff08University of Exeter\uff09<\/p>\n<p>&nbsp;<\/p>\n<p>\u7814\u7a76\u8cbb\u540d\uff1a\u65e5\u672c\u5b66\u8853\u632f\u8208\u4f1a\u00a0\u00a0\u79d1\u5b66\u7814\u7a76\u8cbb\u52a9\u6210\u4e8b\u696d\u00a0\u00a0\u57fa\u76e4\u7814\u7a76(A) [16H01870]<\/p>\n<p>\u7814\u7a76\u8ab2\u984c\u540d\uff1a\u9aa8\u683c\u7b4b\u3092\u5f62\u30fb\u8cea\u30fb\u6a5f\u80fd\u3067\u6349\u3048\u308b\uff1a\u4e00\u822c\u4eba\uff5e\u30a2\u30b9\u30ea\u30fc\u30c8\u306e\u8eab\u4f53\u904b\u52d5\u80fd\u529b\u8e8d\u9032\u3092\u76ee\u6307\u3057\u3066<\/p>\n<p>\u7814\u7a76\u4ee3\u8868\u8005\u540d\u30fb\u6240\u5c5e\u6a5f\u95a2\u540d\uff1a\u5ddd\u4e0a\u6cf0\u96c4\uff08\u65e9\u7a32\u7530\u5927\u5b66\uff09<\/p>\n<p>&nbsp;<\/p>\n<p>\u7814\u7a76\u8cbb\u540d\uff1a\u65e5\u672c\u5b66\u8853\u632f\u8208\u4f1a\u00a0\u00a0\u79d1\u5b66\u7814\u7a76\u8cbb\u52a9\u6210\u4e8b\u696d \u56fd\u969b\u5171\u540c\u7814\u7a76\u5f37\u5316\uff08B\uff09[21KK0175]<\/p>\n<p>\u7814\u7a76\u8ab2\u984c\u540d\uff1aUnravelling the Mechanisms of Muscle Strain Injuries: Toward Injury Prevention, Rehabilitation, and Athletic Performance<\/p>\n<p>\u7814\u7a76\u4ee3\u8868\u8005\u540d\u30fb\u6240\u5c5e\u6a5f\u95a2\u540d\uff1a\u5ddd\u4e0a\u6cf0\u96c4\uff08\u65e9\u7a32\u7530\u5927\u5b66\uff09<\/p>\n<p>PE\u2018s role in this study was supported by a Grant-in-Aid for Japan Society for the Promotion of Science Research Fellows [JP 17F17412]. YK was supported by a Grant-in-Aid for Scientific Research (A) [No. 16H01870]. Both were supported by a Grant-in-Aid for Scientific Research (Fostering Joint International Research B; 21KK0175). PE and PN are currently supported by the National Institute for Health Research (NIHR) Exeter Biomedical Research Centre (BRC). The views expressed are those of the authors and not necessarily those of the NIHR or the Department of Health and Social Care.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30cf\u30e0\u30b9\u30c8\u30ea\u30f3\u30b0\u30b9\u7b49\u5c3a\u6027\u304a\u3088\u3073\u4f38\u5f35\u6027\u53ce\u7e2e\u4e2d\u306b\u304a\u3051\u308b\u7b4b\u5185\u30fb\u7b4b\u9593\u306e\u529b\u5b66\u7684\u7279\u6027\u306e\u5206\u5e03 Intra- and intermuscular shear wave speed distributions in the human ha [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":2422,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[87,1],"tags":[30,51],"class_list":["post-2417","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news-en","category-news","tag-general","tag-research"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.waseda.jp\/fsps\/rcsports\/wp-json\/wp\/v2\/posts\/2417","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.waseda.jp\/fsps\/rcsports\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.waseda.jp\/fsps\/rcsports\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.waseda.jp\/fsps\/rcsports\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.waseda.jp\/fsps\/rcsports\/wp-json\/wp\/v2\/comments?post=2417"}],"version-history":[{"count":1,"href":"https:\/\/www.waseda.jp\/fsps\/rcsports\/wp-json\/wp\/v2\/posts\/2417\/revisions"}],"predecessor-version":[{"id":2423,"href":"https:\/\/www.waseda.jp\/fsps\/rcsports\/wp-json\/wp\/v2\/posts\/2417\/revisions\/2423"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.waseda.jp\/fsps\/rcsports\/wp-json\/wp\/v2\/media\/2422"}],"wp:attachment":[{"href":"https:\/\/www.waseda.jp\/fsps\/rcsports\/wp-json\/wp\/v2\/media?parent=2417"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.waseda.jp\/fsps\/rcsports\/wp-json\/wp\/v2\/categories?post=2417"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.waseda.jp\/fsps\/rcsports\/wp-json\/wp\/v2\/tags?post=2417"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}