Language:
English
繁體中文
Help
回圖書館首頁
手機版館藏查詢
Login
Back
Switch To:
Labeled
|
MARC Mode
|
ISBD
Leg spring model related to muscle a...
~
Dutto, Darren John.
Linked to FindBook
Google Book
Amazon
博客來
Leg spring model related to muscle activation, force, and kinematic patterns during endurance running to voluntary exhaustion.
Record Type:
Electronic resources : Monograph/item
Title/Author:
Leg spring model related to muscle activation, force, and kinematic patterns during endurance running to voluntary exhaustion./
Author:
Dutto, Darren John.
Description:
181 p.
Notes:
Source: Dissertation Abstracts International, Volume: 60-12, Section: A, page: 4363.
Contained By:
Dissertation Abstracts International60-12A.
Subject:
Education, Physical. -
Online resource:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9954855
ISBN:
0599576790
Leg spring model related to muscle activation, force, and kinematic patterns during endurance running to voluntary exhaustion.
Dutto, Darren John.
Leg spring model related to muscle activation, force, and kinematic patterns during endurance running to voluntary exhaustion.
- 181 p.
Source: Dissertation Abstracts International, Volume: 60-12, Section: A, page: 4363.
Thesis (Ph.D.)--Oregon State University, 1999.
Altered stride rate has been consistently observed during running to fatigue. One mechanism for shifting stride rate is a change in leg stiffness, as described by the spring-mass model. The purpose of this study was to determine whether or not vertical stiffness, kvert, changed with exhaustion, and whether kinematics or muscle activity related to any observed changes. Fifteen trained runners performed a run to volitional exhaustion at a constant speed roughly corresponding to 80% of their VO2 peak. Vertical ground reaction forces were recorded every five minutes using an instrumented treadmill. From the force data, temporal characteristics, kvert, and kleg, were calculated for about 40 stances. Muscle activity was determined for five, right limb muscles: vastus medialis (VM), vastus lateralis (VL), biceps femoris (BF), gastrocnemius (G), and tibialis anterior (TA). From the EMG recordings, IEMG and muscle activation times were determined for about 10 stance periods. Ankle, knee, and thigh angles were determined for about 10 stance periods from the same sample period as the EMG, and angular range of motion was calculated. Results from individual single factor ANOVA analyses indicate either increased or decreased kvert for fourteen of the fifteen subjects over the test run (p < 0.01). Changes in vertical stiffness agree well with changes in stride rate (r = 0.85), confirming continued spring-like behavior of the leg with exhaustion. From hierarchical regression analyses, ankle, knee, and thigh range of motion were found to relate to kvert for many subjects with between 10 and 99% of the variability in kvert explained by all three variables. Muscle activity of the VM, VL, and G muscles was found to explain between 3 and 98% of the variability in vertical stiffness across all 15 subjects. Interesting individual observations can be made from the kinematic and EMG data, but no patterns across subject emerge relating to changes in kvert.
ISBN: 0599576790Subjects--Topical Terms:
1018000
Education, Physical.
Leg spring model related to muscle activation, force, and kinematic patterns during endurance running to voluntary exhaustion.
LDR
:02883nmm 2200265 4500
001
1843022
005
20051010101550.5
008
130614s1999 eng d
020
$a
0599576790
035
$a
(UnM)AAI9954855
035
$a
AAI9954855
040
$a
UnM
$c
UnM
100
1
$a
Dutto, Darren John.
$3
1931265
245
1 0
$a
Leg spring model related to muscle activation, force, and kinematic patterns during endurance running to voluntary exhaustion.
300
$a
181 p.
500
$a
Source: Dissertation Abstracts International, Volume: 60-12, Section: A, page: 4363.
500
$a
Adviser: Gerald A. Smith.
502
$a
Thesis (Ph.D.)--Oregon State University, 1999.
520
$a
Altered stride rate has been consistently observed during running to fatigue. One mechanism for shifting stride rate is a change in leg stiffness, as described by the spring-mass model. The purpose of this study was to determine whether or not vertical stiffness, kvert, changed with exhaustion, and whether kinematics or muscle activity related to any observed changes. Fifteen trained runners performed a run to volitional exhaustion at a constant speed roughly corresponding to 80% of their VO2 peak. Vertical ground reaction forces were recorded every five minutes using an instrumented treadmill. From the force data, temporal characteristics, kvert, and kleg, were calculated for about 40 stances. Muscle activity was determined for five, right limb muscles: vastus medialis (VM), vastus lateralis (VL), biceps femoris (BF), gastrocnemius (G), and tibialis anterior (TA). From the EMG recordings, IEMG and muscle activation times were determined for about 10 stance periods. Ankle, knee, and thigh angles were determined for about 10 stance periods from the same sample period as the EMG, and angular range of motion was calculated. Results from individual single factor ANOVA analyses indicate either increased or decreased kvert for fourteen of the fifteen subjects over the test run (p < 0.01). Changes in vertical stiffness agree well with changes in stride rate (r = 0.85), confirming continued spring-like behavior of the leg with exhaustion. From hierarchical regression analyses, ankle, knee, and thigh range of motion were found to relate to kvert for many subjects with between 10 and 99% of the variability in kvert explained by all three variables. Muscle activity of the VM, VL, and G muscles was found to explain between 3 and 98% of the variability in vertical stiffness across all 15 subjects. Interesting individual observations can be made from the kinematic and EMG data, but no patterns across subject emerge relating to changes in kvert.
590
$a
School code: 0172.
650
4
$a
Education, Physical.
$3
1018000
690
$a
0523
710
2 0
$a
Oregon State University.
$3
625720
773
0
$t
Dissertation Abstracts International
$g
60-12A.
790
1 0
$a
Smith, Gerald A.,
$e
advisor
790
$a
0172
791
$a
Ph.D.
792
$a
1999
856
4 0
$u
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9954855
based on 0 review(s)
Location:
ALL
電子資源
Year:
Volume Number:
Items
1 records • Pages 1 •
1
Inventory Number
Location Name
Item Class
Material type
Call number
Usage Class
Loan Status
No. of reservations
Opac note
Attachments
W9192536
電子資源
11.線上閱覽_V
電子書
EB
一般使用(Normal)
On shelf
0
1 records • Pages 1 •
1
Multimedia
Reviews
Add a review
and share your thoughts with other readers
Export
pickup library
Processing
...
Change password
Login