語系:
繁體中文
English
說明(常見問題)
回圖書館首頁
手機版館藏查詢
登入
回首頁
切換:
標籤
|
MARC模式
|
ISBD
Does Restricting Anterior Movement o...
~
Koshewa, Lucy.
FindBook
Google Book
Amazon
博客來
Does Restricting Anterior Movement of the Knees during a Barbell Back Squat Alter Lower Extremity Biomechanics?
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Does Restricting Anterior Movement of the Knees during a Barbell Back Squat Alter Lower Extremity Biomechanics?/
作者:
Koshewa, Lucy.
出版者:
Ann Arbor : ProQuest Dissertations & Theses, : 2018,
面頁冊數:
113 p.
附註:
Source: Masters Abstracts International, Volume: 80-04.
Contained By:
Masters Abstracts International80-04.
標題:
Kinesiology. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10837067
ISBN:
9780438415102
Does Restricting Anterior Movement of the Knees during a Barbell Back Squat Alter Lower Extremity Biomechanics?
Koshewa, Lucy.
Does Restricting Anterior Movement of the Knees during a Barbell Back Squat Alter Lower Extremity Biomechanics?
- Ann Arbor : ProQuest Dissertations & Theses, 2018 - 113 p.
Source: Masters Abstracts International, Volume: 80-04.
Thesis (M.S.)--The University of Wisconsin - Milwaukee, 2018.
This item must not be sold to any third party vendors.
INTRODUCTION: The strength implications of the barbell back squat make it ideal for use in training programs, rehabilitation, and competition. Even though the back squat is an integral part of these programs, there are also concerns about injury risk due to improper biomechanics. Restricted squats (knees kept behind the toes) are noted to reduce joint loading at the knees but may not take into account added potential risks for the entire lower extremity. Unrestricted squats are more representative of natural movement patterns but may increase joint loading especially at the knees. Research has explored the biomechanics of back squats in elite, male populations, but has yet to investigate how back squat biomechanics differ between restricted and non-restricted squats in a female, recreationally-active population. PURPOSE: Therefore, the purpose is to determine how restricting the anterior movement of the knees during barbell back squats affects joint mechanics of the lower extremities in female recreational weightlifters. METHODS: 16 healthy, female, recreationally-active, weightlifters (mean ± SD, age = 25.6 ± 4.2 yrs; height = 170.4 ± 8.3cm; weight = 63.8 ± 8.3 kg) participated in this study. Biomechanical analysis of joint angles and moments were performed using a 3-D motion capture system and standard procedures (Motion Analysis Corporation, Santa Rosa, Ca). Participants performed 5 squats for each of the three squat conditions; natural (NS), knee over toe (KOT), and restricted (RS). The middle 3 squats were used for data processing. A repeated measures ANOVA was used to compare sagittal plane joint angles, lower extremity joint moments, net support moments, and the relative contribution of the individual joint moment to the net support moment, expressed as a percentage. An adjusted alpha value of α < .004 determined statistical significance. RESULTS: Knee angle and flexion moment were smaller in RS condition and larger in the NS condition F(2,30) = 35.3, p < .0001, F(2,30) = 18.8, p < .0001. Hi p extension moment was smallest in KOT and largest in the RS and NS conditions F(2,30) = 18.2, p < .0001. Ankle angle was the smallest in RS and NS conditions and largest in the KOT condition F(2,30) = 75.8, p < .0001. Trunk angle was largest in the RS condition F(2,30) = 42.5, p < .0001. The net support moment was largest in the NS condition F(2,30) = 7.9, p = .002 CONCLUSIONS: The primary findings of this study supported initial hypotheses that anterior restriction of the knees during a barbell back squat affects lower extremity biomechanics. There were clear differences in sagittal plane joint angles and joint moments seen across the NS, KOT, and RS conditions. The net support moment and the percent contribution of the joint moments also differed between squat conditions and provided valuable information about the distribution of the load across the joints among the three squat conditions. Findings also revealed that this population has natural squat mechanics that are most similar to squatting with the knees over the toes. This may suggest that individuals in this population, with a year of barbell back squat experience, self-optimize their natural squat mechanics. Alternatively, it is possible that the three squat conditions could all be appropriate ways to squat, depending on the goals of the lifter. These three squats may be used as a way to decrease the load on individual joints while performing the barbell back squat. Training may also be important to decreasing the compensations seen in the RS condition, which may allow for lifters to squat in a safer manner without disproportionally increasing joint loading.
ISBN: 9780438415102Subjects--Topical Terms:
517627
Kinesiology.
Does Restricting Anterior Movement of the Knees during a Barbell Back Squat Alter Lower Extremity Biomechanics?
LDR
:04776nmm a2200325 4500
001
2205714
005
20190828135856.5
008
201008s2018 ||||||||||||||||| ||eng d
020
$a
9780438415102
035
$a
(MiAaPQ)AAI10837067
035
$a
(MiAaPQ)uwm:12182
035
$a
AAI10837067
040
$a
MiAaPQ
$c
MiAaPQ
100
1
$a
Koshewa, Lucy.
$3
3432584
245
1 0
$a
Does Restricting Anterior Movement of the Knees during a Barbell Back Squat Alter Lower Extremity Biomechanics?
260
1
$a
Ann Arbor :
$b
ProQuest Dissertations & Theses,
$c
2018
300
$a
113 p.
500
$a
Source: Masters Abstracts International, Volume: 80-04.
500
$a
Publisher info.: Dissertation/Thesis.
500
$a
Earl-Boehm, Jennifer E.
502
$a
Thesis (M.S.)--The University of Wisconsin - Milwaukee, 2018.
506
$a
This item must not be sold to any third party vendors.
520
$a
INTRODUCTION: The strength implications of the barbell back squat make it ideal for use in training programs, rehabilitation, and competition. Even though the back squat is an integral part of these programs, there are also concerns about injury risk due to improper biomechanics. Restricted squats (knees kept behind the toes) are noted to reduce joint loading at the knees but may not take into account added potential risks for the entire lower extremity. Unrestricted squats are more representative of natural movement patterns but may increase joint loading especially at the knees. Research has explored the biomechanics of back squats in elite, male populations, but has yet to investigate how back squat biomechanics differ between restricted and non-restricted squats in a female, recreationally-active population. PURPOSE: Therefore, the purpose is to determine how restricting the anterior movement of the knees during barbell back squats affects joint mechanics of the lower extremities in female recreational weightlifters. METHODS: 16 healthy, female, recreationally-active, weightlifters (mean ± SD, age = 25.6 ± 4.2 yrs; height = 170.4 ± 8.3cm; weight = 63.8 ± 8.3 kg) participated in this study. Biomechanical analysis of joint angles and moments were performed using a 3-D motion capture system and standard procedures (Motion Analysis Corporation, Santa Rosa, Ca). Participants performed 5 squats for each of the three squat conditions; natural (NS), knee over toe (KOT), and restricted (RS). The middle 3 squats were used for data processing. A repeated measures ANOVA was used to compare sagittal plane joint angles, lower extremity joint moments, net support moments, and the relative contribution of the individual joint moment to the net support moment, expressed as a percentage. An adjusted alpha value of α < .004 determined statistical significance. RESULTS: Knee angle and flexion moment were smaller in RS condition and larger in the NS condition F(2,30) = 35.3, p < .0001, F(2,30) = 18.8, p < .0001. Hi p extension moment was smallest in KOT and largest in the RS and NS conditions F(2,30) = 18.2, p < .0001. Ankle angle was the smallest in RS and NS conditions and largest in the KOT condition F(2,30) = 75.8, p < .0001. Trunk angle was largest in the RS condition F(2,30) = 42.5, p < .0001. The net support moment was largest in the NS condition F(2,30) = 7.9, p = .002 CONCLUSIONS: The primary findings of this study supported initial hypotheses that anterior restriction of the knees during a barbell back squat affects lower extremity biomechanics. There were clear differences in sagittal plane joint angles and joint moments seen across the NS, KOT, and RS conditions. The net support moment and the percent contribution of the joint moments also differed between squat conditions and provided valuable information about the distribution of the load across the joints among the three squat conditions. Findings also revealed that this population has natural squat mechanics that are most similar to squatting with the knees over the toes. This may suggest that individuals in this population, with a year of barbell back squat experience, self-optimize their natural squat mechanics. Alternatively, it is possible that the three squat conditions could all be appropriate ways to squat, depending on the goals of the lifter. These three squats may be used as a way to decrease the load on individual joints while performing the barbell back squat. Training may also be important to decreasing the compensations seen in the RS condition, which may allow for lifters to squat in a safer manner without disproportionally increasing joint loading.
590
$a
School code: 0263.
650
4
$a
Kinesiology.
$3
517627
650
4
$a
Biomechanics.
$3
548685
690
$a
0575
690
$a
0648
710
2
$a
The University of Wisconsin - Milwaukee.
$b
Kinesiology.
$3
2102596
773
0
$t
Masters Abstracts International
$g
80-04.
790
$a
0263
791
$a
M.S.
792
$a
2018
793
$a
English
856
4 0
$u
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10837067
筆 0 讀者評論
館藏地:
全部
電子資源
出版年:
卷號:
館藏
1 筆 • 頁數 1 •
1
條碼號
典藏地名稱
館藏流通類別
資料類型
索書號
使用類型
借閱狀態
預約狀態
備註欄
附件
W9382263
電子資源
11.線上閱覽_V
電子書
EB
一般使用(Normal)
在架
0
1 筆 • 頁數 1 •
1
多媒體
評論
新增評論
分享你的心得
Export
取書館
處理中
...
變更密碼
登入