Abstract：
OBJECTIVES:To determine injury risk-workload associations in collegiate American Football. DESIGN:Retrospective analysis. METHODS:Workload and injury data was recorded from 52 players during a full NCAA football season. Acute, chronic, and a range of acute:chronic workload ratios (ACWR: 7:14, 7:21 and 7:28 day) calculated using rolling and exponentially weighted moving averages (EWMA) were plotted against non-contact injuries (regardless of time lost or not) sustained within 3- and 7-days. Injury risks were also determined relative to position and experience. RESULTS:105 non-contact injuries (18 game- and 87 training-related) were observed with almost 40% sustained during the pre-season. 7-21 day EWMA ACWR's with a 3-day injury lag were most closely associated with injury (R2=0.54). Relative injury risks were >3× greater with high compared to moderate and low ratios and magnified when combined with low 21-day chronic workloads (injury probability=92.1%). Injury risks were similar across positions. 'Juniors' presented likely and possibly increased overall injury risk compared to 'Freshman' (RR: 1.94, CI 1.07-3.52) and 'Seniors' (RR: 1.7, CI 0.92-3.14), yet no specific ACWR - experience or - position interactions were identified. CONCLUSIONS:High injury rates during college football pre-season training may be associated with high acute loads. In-season injury risks were greatest with high ACWR and evident even when including (more common and less serious) non-time loss injuries. Substantially increased injury risks when low 21-day chronic workloads and concurrently high EWMA ACWR highlights the importance of load management for individuals with chronic game- (non-involved on game day) and or training (following injury) absences.
journal_name
J Sci Med Sportjournal_title
Journal of science and medicine in sportauthors
Sampson JA,Murray A,Williams S,Halseth T,Hanisch J,Golden G,Fullagar HHKdoi
10.1016/j.jsams.2018.05.019subject
Has Abstractpub_date
2018-12-01 00:00:00pages
1215-1220issue
12eissn
1440-2440issn
1878-1861pii
S1440-2440(18)30176-2journal_volume
21pub_type
杂志文章abstract：OBJECTIVES:To test the validity and intra-instrument reliability of the HJ-203 Omron pedometer when worn in different positions, under controlled and free-living conditions. DESIGN:Cross-sectional. METHODS:Forty healthy adults (20 men, 29.5±7.7 years) participated in three controlled tests, i.e. 20 step test, stair c...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2012.02.002
更新日期：2012-09-01 00:00:00
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journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/s1440-2440(03)80027-0
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abstract：OBJECTIVES:While several cross-sectional studies have investigated the acute effects of shoe drop on running biomechanics, the long-term consequences are currently unknown. This study aimed to investigate if the drop of standard cushioned shoes induces specific adaptations in running technique over a six-month period i...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.jsams.2017.01.238
更新日期：2017-08-01 00:00:00
abstract：:The purpose of this study was to examine the effect of anaerobic fatigue and training status on the joint stiffness (JS) regulation of the lower limbs. Twenty-two subjects participated in this study, with a group of athletes (ATH: n=11, age: 22.1+/-9.9 yrs, ht: 181.9+/-6.3 cm, mass: 88.2+/-12.7 kg) compared to a group...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2007.12.003
更新日期：2009-05-01 00:00:00
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journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2007.07.006
更新日期：2008-09-01 00:00:00
abstract：OBJECTIVES:While there is some evidence that aerobic fitness is positively associated with executive functioning in children, evidence for a relation between children's daily physical activity and their executive functioning is limited. The objective was to examine associations between objectively measured daily physic...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2014.09.006
更新日期：2015-11-01 00:00:00
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abstract：OBJECTIVES:To examine the efficacy of "slow" signs and patroller presence at "slow" signs to reduce speeds of snowsports participants, compared to a condition where no sign or patroller are present, independent of other factors that may contribute to skier slowing (such as prior knowledge, trail convergence, etc.). DE...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
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journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
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更新日期：2007-06-01 00:00:00
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journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/s1440-2440(04)80014-8
更新日期：2004-06-01 00:00:00
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更新日期：2020-06-01 00:00:00
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journal_title：Journal of science and medicine in sport
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journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
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更新日期：2009-09-01 00:00:00
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journal_title：Journal of science and medicine in sport
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更新日期：2020-11-01 00:00:00
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journal_title：Journal of science and medicine in sport
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doi：10.1016/j.jsams.2010.06.002
更新日期：2011-01-01 00:00:00
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journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2009.05.006
更新日期：2010-05-01 00:00:00
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journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2011.07.003
更新日期：2012-01-01 00:00:00
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journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2007.10.004
更新日期：2009-01-01 00:00:00
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journal_title：Journal of science and medicine in sport
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pub_type： 杂志文章
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更新日期：2015-03-01 00:00:00
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journal_title：Journal of science and medicine in sport
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更新日期：2000-03-01 00:00:00
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更新日期：2016-09-01 00:00:00
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更新日期：2019-02-01 00:00:00
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更新日期：2017-12-01 00:00:00
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更新日期：2019-07-01 00:00:00
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journal_title：Journal of science and medicine in sport
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abstract：OBJECTIVE:The aim of this study was to determine whether V˙O(2) kinetics and specifically, the time constant of transitions from rest to heavy (τ(p)H) and severe (τ(p)S) exercise intensities, are related to middle distance swimming performance. DESIGN:Fourteen highly trained male swimmers (mean ± SD: 20.5 ± 3.0 yr; 75...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
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更新日期：2012-01-01 00:00:00
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journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2020.09.016
更新日期：2020-09-29 00:00:00
