Abstract:
CONTEXT:Fatigue could contribute to ankle-sprain injuries during sport, particularly for individuals with chronic ankle instability (CAI). OBJECTIVE:To examine whether adults with or without CAI develop fatigue at similar rates when performing ankle exercises at the same relative effort level and whether these groups differ in their subjective perceptions of fatigue. DESIGN:Controlled laboratory study. SETTING:Biomechanics research laboratory. PATIENTS OR OTHER PARTICIPANTS:A total of 11 volunteers with CAI (1 man, 10 women; age = 23.5 ± 3.0 years, height = 168.0 ± 11.2 cm, mass = 64.3 ± 13.5 kg) were recruited for the unstable-ankle group, and 11 volunteers matched for age, height, mass, and sex (1 man, 10 women; age = 24.1 ± 2.1 years, height = 169.5 ± 9.7 cm, mass = 62.3 ± 9.7 kg) were recruited as control participants. INTERVENTION(S):Localized muscle fatigue (LMF) was induced in the ankle of the dominant limb using a custom fatigue protocol. Plantar-flexion and dorsiflexion exertions were completed at a rate of 12 cycles per minute at isotonic loads equal to 70% and 30%, respectively, of individual maximal voluntary isometric strength. Intermittent measures of maximal voluntary isometric strength and ratings of perceived exertion (RPEs) were obtained. MAIN OUTCOME MEASURE(S):We compared isometric-strength measures and RPE scores at each observation time (prefatigue and at 4, 8, 12, and 16 minutes into the fatigue protocol) and the group correlations between changes in strength and changes in RPE scores. RESULTS:Based on ankle-strength measures, the 2 test groups developed LMF at similar rates when exercising at equivalent levels of relative effort. The 2 groups also reported similar levels of discomfort as fatigue progressed. CONCLUSIONS:The rate of LMF development at the ankle and the associated perception of fatigue did not differ between adults with or without CAI.
journal_name
J Athl Trainjournal_title
Journal of athletic trainingauthors
Webster CA,Nussbaum MAdoi
10.4085/1062-6050-51.9.02subject
Has Abstractpub_date
2016-06-02 00:00:00pages
491-7issue
6eissn
1062-6050issn
1938-162Xjournal_volume
51pub_type
杂志文章abstract:CONTEXT:Hiring athletic trainers (ATs) in high schools may lower medical payments by third-party payers such as Medicaid or commercial insurers by reducing injury risks or may increase medical payments due to more referrals to other health care providers. To date, evidence is lacking on the actual financial effect of h...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:10.4085/1062-6050-390-17
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journal_title:Journal of athletic training
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journal_title:Journal of athletic training
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更新日期:2021-01-22 00:00:00
abstract:OBJECTIVE: :To present recommendations for athletic trainers and other health care providers regarding the identification of risk factors for and management of individuals with patellofemoral pain (PFP). BACKGROUND: :Patellofemoral pain is one of the most common knee diagnoses; however, this condition continues to be ...
journal_title:Journal of athletic training
pub_type: 杂志文章,评审
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更新日期:2018-09-01 00:00:00
abstract:CONTEXT: The Landing Error Scoring System (LESS) can be used to identify individuals with an elevated risk of lower extremity injury. The limitation of the LESS is that raters identify movement errors from video replay, which is time-consuming and, therefore, may limit its use by clinicians. A markerless motion-captur...
journal_title:Journal of athletic training
pub_type: 杂志文章
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更新日期:2017-11-01 00:00:00
abstract::OBJECTIVE: To test the influence of cooling on proprioceptive acuity as reflected in the ability to discriminate weights. DESIGN AND SETTING: Participants were trained to perform a weight-discrimination task. Their ability to correctly report small increments in weight was compared before and after local cooling (a 20...
journal_title:Journal of athletic training
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更新日期:2001-06-01 00:00:00
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更新日期:2011-05-01 00:00:00
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journal_title:Journal of athletic training
pub_type: 杂志文章
doi:10.4085/1062-6050-393.19
更新日期:2020-09-04 00:00:00
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journal_title:Journal of athletic training
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doi:
更新日期:2003-07-01 00:00:00
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更新日期:2002-09-01 00:00:00
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journal_title:Journal of athletic training
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journal_title:Journal of athletic training
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更新日期:1996-07-01 00:00:00
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journal_title:Journal of athletic training
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doi:10.4085/1062-6050-173-17
更新日期:2018-10-01 00:00:00
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doi:10.4085/1062-6050-43.4.342
更新日期:2008-07-01 00:00:00
abstract:OBJECTIVE:Researchers have produced a hypothesis of transient heat intolerance (HI) after exertional heat stroke (EHS). Based on this hypothesis, heat-tolerance testing (HTT) has been postponed until weeks 6 to 8 after EHS and other types of exertional heat illness (EHI). We compared the HTT results of participants aft...
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doi:10.4085/1062-6050-54-05
更新日期:2019-05-01 00:00:00
abstract::OBJECTIVE: To identify the types of injuries the human brain incurs as a result of traumatic forces applied to the cranium. In athletic events and endeavors, the full spectrum of intracranial hemorrhages in various compartments, raised intracranial pressure, and diffuse nonhemorrhagic damage may be seen. In this revie...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:
更新日期:2001-09-01 00:00:00
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journal_title:Journal of athletic training
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更新日期:2018-07-01 00:00:00
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pub_type: 杂志文章,随机对照试验
doi:
更新日期:2007-07-01 00:00:00
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journal_title:Journal of athletic training
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doi:
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更新日期:2016-09-01 00:00:00
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