Changes in the mechanical properties of human and amphibian muscle after eccentric exercise

1997 ◽  
Vol 76 (1) ◽  
pp. 21-31 ◽  
Author(s):  
C. Jones ◽  
T. Allen ◽  
J. Talbot ◽  
D. L. Morgan ◽  
U. Proske
Keyword(s):  
Mechanical Properties ◽  
Eccentric Exercise

scholarly journals Regional Differences of Mechanical Properties in a Biceps Brachii Following Eccentric Exercise

2021 ◽  
Vol 30 (3) ◽  
pp. 327-335
Author(s):  
Choun-sub Kim ◽  
Maeng-kyu Kim
Keyword(s):  
Mechanical Properties ◽  
Muscle Damage ◽  
Eccentric Exercise ◽  
Muscle Function ◽  
Elbow Joint ◽  
Muscle Soreness ◽  
Biceps Brachii ◽  
Dynamic Stiffness ◽  
Significant Difference ◽  
Regional Muscle

PURPOSE: This study aimed to examine the effects of eccentric exercise (ECC) on the indices of mechanical properties together with markers of exercise-induced muscle damage (EIMD) in different sites of the biceps brachii (BB) muscle.METHODS: ECC using an elbow joint was performed in 13 non-trained, college men. Global symptoms of EIMD were identified through changes in muscle soreness and serum creatine kinase (CK) activity, including muscle function following ECC. To evaluate regional EIMD, muscle swelling and tenderness as well as muscular echo intensity were measured at distal (4 cm above the elbow joint) and middle (30% of the distance from the antecubital crease to the acromion) sites within the BB muscle. A handheld myotonometer was used to estimate changes in mechanical properties, that is, oscillation frequency (F), dynamic stiffness (S), and relaxation time (R), of BB muscles after ECC.RESULTS: A significant difference in the major markers of EIMD, such as muscle soreness and serum CK activity, along with parameters of muscle function, was observed after ECC compared to baseline. Although all indirect markers of regional muscle damage demonstrated meaningful differences between before and after ECC, no statistically significant interaction between the distal and middle sites was observed in any of the markers. After ECC, both distal and middle sites showed significant changes in F, S, and R, but no statistical differences in changes in muscle mechanical properties were observed between localized muscle sites within BB muscles.CONCLUSIONS: Changes in mechanical properties, including regional muscle damage, seem to be uniformly influenced by different anatomical locations within the BB muscle, such as elbow flexors, following ECC.

scholarly journals MR elastography measurement of the effect of passive warmup prior to eccentric exercise on thigh muscle mechanical properties

2017 ◽  
Vol 46 (4) ◽  
pp. 1115-1127 ◽  
Author(s):  
Paul Kennedy ◽  
Lewis J. Macgregor ◽  
Eric Barnhill ◽  
Curtis L. Johnson ◽  
Michael Perrins ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Eccentric Exercise ◽  
Thigh Muscle ◽  
Mr Elastography

Twitch mechanical properties after repeated eccentric exercise of the elbow flexors

2014 ◽  
Vol 39 (1) ◽  
pp. 74-81 ◽  
Author(s):  
Damian Janecki ◽  
Anna Jaskólska ◽  
Jarosław Marusiak ◽  
Renata Andrzejewska ◽  
Artur Jaskólski
Keyword(s):  
Mechanical Properties ◽  
Eccentric Exercise ◽  
Elbow Flexors

Dose Dependent Effect of Massage on Recovery of Muscle Mechanical Properties Following Eccentric Exercise

2011 ◽  
Vol 43 (Suppl 1) ◽  
pp. 37
Author(s):  
Caroline M. Haas ◽  
Tong Gan ◽  
Furqan Haq ◽  
Yi Zhao ◽  
Timothy A. Butterfield ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Eccentric Exercise ◽  
Dependent Effect ◽  
Dose Dependent ◽  
Dose Dependent Effect

scholarly journals In vivo passive mechanical properties of skeletal muscle improve with massage-like loading following eccentric exercise

2012 ◽  
Vol 45 (15) ◽  
pp. 2630-2636 ◽  
Author(s):  
Caroline Haas ◽  
Thomas M. Best ◽  
Qian Wang ◽  
Timothy A. Butterfield ◽  
Yi Zhao
Keyword(s):  
Mechanical Properties ◽  
Skeletal Muscle ◽  
Eccentric Exercise

Effects of Eccentric Exercise on Passive Mechanical Properties of Human Gastrocnemius in vivo

2007 ◽  
Vol 39 (5) ◽  
pp. 849-857 ◽  
Author(s):  
PHU D. HOANG ◽  
ROBERT D. HERBERT ◽  
SIMON C. GANDEVIA
Keyword(s):  
Mechanical Properties ◽  
Eccentric Exercise

Phase Transformations in Ti-7w/oMo-3w/oMe Alloy

1974 ◽  
Vol 32 ◽  
pp. 514-515
Author(s):  
S. Fujishiro
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Transmission Electron Microscopy ◽  
Tensile Strength ◽  
Mechanical Processing ◽  
Ray Method ◽  
X Ray ◽  
Transmission Electron ◽  
Water Quench ◽  
Alpha Beta

The mechanical properties of three titanium alloys (Ti-7Mo-3Al, Ti-7Mo- 3Cu and Ti-7Mo-3Ta) were evaluated as function of: 1) Solutionizing in the beta field and aging, 2) Thermal Mechanical Processing in the beta field and aging, 3) Solutionizing in the alpha + beta field and aging. The samples were isothermally aged in the temperature range 300° to 700*C for 4 to 24 hours, followed by a water quench. Transmission electron microscopy and X-ray method were used to identify the phase formed. All three alloys solutionized at 1050°C (beta field) transformed to martensitic alpha (alpha prime) upon being water quenched. Despite this heavily strained alpha prime, which is characterized by microtwins the tensile strength of the as-quenched alloys is relatively low and the elongation is as high as 30%.

Effects of cooling rate on the mechanical properties of dual phase treated vanadium steels

1983 ◽  
Vol 41 ◽  
pp. 220-221
Author(s):  
L.J. Chen ◽  
H.C. Cheng ◽  
J.R. Gong ◽  
J.G. Yang
Keyword(s):  
Mechanical Properties ◽  
Cooling Rate ◽  
Automobile Industry ◽  
High Strength ◽  
Weight Percent ◽  
Low Alloy Steels ◽  
Dual Phase ◽  
Resource Requirement ◽  
Alloy Steels ◽  
Potential Weight

For fuel savings as well as energy and resource requirement, high strength low alloy steels (HSLA) are of particular interest to automobile industry because of the potential weight reduction which can be achieved by using thinner section of these steels to carry the same load and thus to improve the fuel mileage. Dual phase treatment has been utilized to obtain superior strength and ductility combinations compared to the HSLA of identical composition. Recently, cooling rate following heat treatment was found to be important to the tensile properties of the dual phase steels. In this paper, we report the results of the investigation of cooling rate on the microstructures and mechanical properties of several vanadium HSLA steels.The steels with composition (in weight percent) listed below were supplied by China Steel Corporation: 1. low V steel (0.11C, 0.65Si, 1.63Mn, 0.015P, 0.008S, 0.084Aℓ, 0.004V), 2. 0.059V steel (0.13C, 0.62S1, 1.59Mn, 0.012P, 0.008S, 0.065Aℓ, 0.059V), 3. 0.10V steel (0.11C, 0.58Si, 1.58Mn, 0.017P, 0.008S, 0.068Aℓ, 0.10V).

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