Sarah T Ridge, Tamarie Trotter, Joshua K Sponbeck, A Wayne Johnson, Iain Hunter, Dustin A Bruening
{"title":"男性跑步者个体的差异性对累积负荷的影响大于脚击类型。","authors":"Sarah T Ridge, Tamarie Trotter, Joshua K Sponbeck, A Wayne Johnson, Iain Hunter, Dustin A Bruening","doi":"10.1177/19417381251333415","DOIUrl":null,"url":null,"abstract":"<p><strong>Background: </strong>Foot strike type affects running mechanics and may influence overuse injury occurrence. Measuring the interaction between cumulative load and foot strike type may provide additional information that could increase understanding of injury mechanisms.</p><p><strong>Hypothesis: </strong>There will be no differences in cumulative loading between runners using rearfoot strike (RFS) and nonrearfoot strike (NRFS) patterns. NRFS runners will have a greater stride rate. There will be differences in per stride metrics of select lower extremity mechanics.</p><p><strong>Study design: </strong>Observational laboratory study.</p><p><strong>Level of evidence: </strong>Level 3.</p><p><strong>Methods: </strong>Thirty male participants (age, 22.7 ± 2.9 years; height, 1.79 ± 0.07 m; mass, 70.7 ± 7.86 kg; mean ± SD) ran on an instrumented treadmill for 5 km at 3.15 m/s with their preferred foot strike type (14 RFS, 16 NRFS). Stride rate, foot strike angle, loading rate (LR), per stride and per kilometer (cumulative) vertical ground-reaction force (VGRF) impulse, impact peak, absolute peak, knee negative work, and ankle negative work were calculated and compared across time and between groups.</p><p><strong>Results: </strong>Per stride differences were seen for stance time, foot strike angle, and LR (greater for RFS runners, <i>P</i> = 0.003). Per stride and cumulative ankle and knee negative work showed significant differences (greater ankle negative work for NRFS runners, <i>P</i> < 0.001 [per stride and cumulative], greater knee negative work for RFS runners, <i>P</i> = 0.01 per stride, <i>P</i> = 0.008 cumulative).</p><p><strong>Conclusion: </strong>Ankle and knee loading metrics showed differences in per stride and cumulative metrics between foot strike groups. Individual variability in VGRF loading patterns was more apparent than group distinctions. The common perception that NRFS runners have a higher stride rate was not supported.</p><p><strong>Clinical relevance: </strong>Individual loading patterns, not just foot strike type, and training session characteristics related to cumulative load should be considered when assessing injury risk.</p>","PeriodicalId":54276,"journal":{"name":"Sports Health-A Multidisciplinary Approach","volume":" ","pages":"19417381251333415"},"PeriodicalIF":2.7000,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12009271/pdf/","citationCount":"0","resultStr":"{\"title\":\"Variability Among Individual Male Runners Influences Cumulative Loading More Than Foot Strike Type.\",\"authors\":\"Sarah T Ridge, Tamarie Trotter, Joshua K Sponbeck, A Wayne Johnson, Iain Hunter, Dustin A Bruening\",\"doi\":\"10.1177/19417381251333415\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Background: </strong>Foot strike type affects running mechanics and may influence overuse injury occurrence. Measuring the interaction between cumulative load and foot strike type may provide additional information that could increase understanding of injury mechanisms.</p><p><strong>Hypothesis: </strong>There will be no differences in cumulative loading between runners using rearfoot strike (RFS) and nonrearfoot strike (NRFS) patterns. NRFS runners will have a greater stride rate. There will be differences in per stride metrics of select lower extremity mechanics.</p><p><strong>Study design: </strong>Observational laboratory study.</p><p><strong>Level of evidence: </strong>Level 3.</p><p><strong>Methods: </strong>Thirty male participants (age, 22.7 ± 2.9 years; height, 1.79 ± 0.07 m; mass, 70.7 ± 7.86 kg; mean ± SD) ran on an instrumented treadmill for 5 km at 3.15 m/s with their preferred foot strike type (14 RFS, 16 NRFS). Stride rate, foot strike angle, loading rate (LR), per stride and per kilometer (cumulative) vertical ground-reaction force (VGRF) impulse, impact peak, absolute peak, knee negative work, and ankle negative work were calculated and compared across time and between groups.</p><p><strong>Results: </strong>Per stride differences were seen for stance time, foot strike angle, and LR (greater for RFS runners, <i>P</i> = 0.003). Per stride and cumulative ankle and knee negative work showed significant differences (greater ankle negative work for NRFS runners, <i>P</i> < 0.001 [per stride and cumulative], greater knee negative work for RFS runners, <i>P</i> = 0.01 per stride, <i>P</i> = 0.008 cumulative).</p><p><strong>Conclusion: </strong>Ankle and knee loading metrics showed differences in per stride and cumulative metrics between foot strike groups. Individual variability in VGRF loading patterns was more apparent than group distinctions. The common perception that NRFS runners have a higher stride rate was not supported.</p><p><strong>Clinical relevance: </strong>Individual loading patterns, not just foot strike type, and training session characteristics related to cumulative load should be considered when assessing injury risk.</p>\",\"PeriodicalId\":54276,\"journal\":{\"name\":\"Sports Health-A Multidisciplinary Approach\",\"volume\":\" \",\"pages\":\"19417381251333415\"},\"PeriodicalIF\":2.7000,\"publicationDate\":\"2025-04-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12009271/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Sports Health-A Multidisciplinary Approach\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.1177/19417381251333415\",\"RegionNum\":2,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"SPORT SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Sports Health-A Multidisciplinary Approach","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1177/19417381251333415","RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"SPORT SCIENCES","Score":null,"Total":0}
Variability Among Individual Male Runners Influences Cumulative Loading More Than Foot Strike Type.
Background: Foot strike type affects running mechanics and may influence overuse injury occurrence. Measuring the interaction between cumulative load and foot strike type may provide additional information that could increase understanding of injury mechanisms.
Hypothesis: There will be no differences in cumulative loading between runners using rearfoot strike (RFS) and nonrearfoot strike (NRFS) patterns. NRFS runners will have a greater stride rate. There will be differences in per stride metrics of select lower extremity mechanics.
Study design: Observational laboratory study.
Level of evidence: Level 3.
Methods: Thirty male participants (age, 22.7 ± 2.9 years; height, 1.79 ± 0.07 m; mass, 70.7 ± 7.86 kg; mean ± SD) ran on an instrumented treadmill for 5 km at 3.15 m/s with their preferred foot strike type (14 RFS, 16 NRFS). Stride rate, foot strike angle, loading rate (LR), per stride and per kilometer (cumulative) vertical ground-reaction force (VGRF) impulse, impact peak, absolute peak, knee negative work, and ankle negative work were calculated and compared across time and between groups.
Results: Per stride differences were seen for stance time, foot strike angle, and LR (greater for RFS runners, P = 0.003). Per stride and cumulative ankle and knee negative work showed significant differences (greater ankle negative work for NRFS runners, P < 0.001 [per stride and cumulative], greater knee negative work for RFS runners, P = 0.01 per stride, P = 0.008 cumulative).
Conclusion: Ankle and knee loading metrics showed differences in per stride and cumulative metrics between foot strike groups. Individual variability in VGRF loading patterns was more apparent than group distinctions. The common perception that NRFS runners have a higher stride rate was not supported.
Clinical relevance: Individual loading patterns, not just foot strike type, and training session characteristics related to cumulative load should be considered when assessing injury risk.
期刊介绍：
Sports Health: A Multidisciplinary Approach is an indispensable resource for all medical professionals involved in the training and care of the competitive or recreational athlete, including primary care physicians, orthopaedic surgeons, physical therapists, athletic trainers and other medical and health care professionals.
Published bimonthly, Sports Health is a collaborative publication from the American Orthopaedic Society for Sports Medicine (AOSSM), the American Medical Society for Sports Medicine (AMSSM), the National Athletic Trainers’ Association (NATA), and the Sports Physical Therapy Section (SPTS).
The journal publishes review articles, original research articles, case studies, images, short updates, legal briefs, editorials, and letters to the editor.
Topics include:
-Sports Injury and Treatment
-Care of the Athlete
-Athlete Rehabilitation
-Medical Issues in the Athlete
-Surgical Techniques in Sports Medicine
-Case Studies in Sports Medicine
-Images in Sports Medicine
-Legal Issues
-Pediatric Athletes
-General Sports Trauma
-Sports Psychology
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
