scholarly journals EMG-based Monitoring Muscle Contraction Force to Determine Most Effective Exercise

2021 ◽  
Vol 2011 (1) ◽  
pp. 012021
Author(s):  
Jiawei Fu ◽  
Yichen He ◽  
Siming Jiang ◽  
Zhongqi Tao ◽  
Yifan Wen ◽  
...  
Keyword(s):  
Muscle Contraction ◽  
Contraction Force

Tubular Repair of the Median Nerve in the Human Forearm

1994 ◽  
Vol 19 (3) ◽  
pp. 273-276 ◽  
Author(s):  
G. LUNDBORG ◽  
B. ROSÉN ◽  
S. O. ABRAHAMSON ◽  
L. DAHLIN ◽  
N. DANIELSEN
Keyword(s):  
Muscle Contraction ◽  
Median Nerve ◽  
Hand Function ◽  
Nerve Trunk ◽  
Contraction Force ◽  
Silicone Tube ◽  
Human Forearm ◽  
Normal Hand ◽  
Male Patients ◽  
Chamber Technique

Transected median nerves in the forearm of two male patients, 12 and 21 years of age, were treated with a chamber technique leaving a 3 to 5 mm gap between the nerve ends. The nerve ends were enclosed in a silicone tube of such a dimension that would not cause compression of the nerve. Post-operative examination including sensory evaluation and assessment of muscle contraction force was carried out after 3 years. In both cases there was excellent motor recovery of the thenar muscles. Outgrowth of sensory fibres was remarkably fast, resulting ultimately in functional sensibility allowing almost normal hand function. 2PD was ⩽ 6 mm (12year-old patient) and 8 to 10 mm (21-year-old patient) respectively. In one case the silicone tube was re-explored because of minor local discomfort 2 years after the repair. The former gap was bridged by a smooth continuous nerve-like structure of the same diameter as the adjacent nerve trunk and with no signs of nenroma formation or compression of the nerve.

scholarly journals In vitro muscle contraction force measurements on isolated and entire rat diaphragms

Critical Care ◽  
2010 ◽  
Vol 14 (Suppl 1) ◽  
pp. P204 ◽  
Author(s):  
C Armbruster ◽  
C Dassow ◽  
K Gamerdinger ◽  
J Guttmann ◽  
M Schneider ◽  
...  
Keyword(s):  
Muscle Contraction ◽  
Force Measurements ◽  
Contraction Force

Effects Of Thermotherapy And Cryotherapy On Muscle Hypertrophy And Muscle Contraction Force Following Resistance Exercise

2008 ◽  
Vol 40 (Supplement) ◽  
pp. S258 ◽  
Author(s):  
Lucas C. Smith ◽  
Stefan A. Mroczkowski ◽  
Stacey Buser ◽  
Susan Bemis ◽  
Ronald Otterstetter
Keyword(s):  
Resistance Exercise ◽  
Muscle Contraction ◽  
Muscle Hypertrophy ◽  
Contraction Force

scholarly journals Influence of heating and cooling on muscle fatigue and recovery

Medicina ◽  
2008 ◽  
Vol 44 (9) ◽  
pp. 687 ◽  
Author(s):  
Irina Ramanauskienė ◽  
Albertas Skurvydas ◽  
Saulė Sipavičienė ◽  
Žibuoklė Senikienė ◽  
Vitas Linonis ◽  
...  
Keyword(s):  
Creatine Kinase ◽  
Blood Serum ◽  
Muscle Contraction ◽  
Muscle Fatigue ◽  
Kinase Activity ◽  
Creatine Kinase Activity ◽  
Knee Extensors ◽  
Contraction Force ◽  
Heating And Cooling ◽  
Muscle Cooling

The aim of the present study was to establish the influence of muscle heating and cooling on knee flexors and extensors during fatiguing exercise. The participants of the study were 10 healthy males aged 19–23 years. The participants of the study were tested with the isokinetic dynamometer. Control measurements were done before the load as well as 10 min, 30 min, 60 min, and 24 h after the load. The participants performed concentric exercise bouts: 50 knee extensions and flexions at the fixed speed of 180°/s, when femoral muscles before concentric load were of normal temperature, were heated or cooled. Creatine kinase activity in blood serum was estimated 1 h before the load and 24 h after it. Internal temperature of the muscle quadriceps femoris after muscle heating for 45 min increased to 39.5±0.2°C (P<0.001) and after muscle cooling for 30 min decreased to 32.5±0.3°C (P<0.05) as compared to baseline temperature (before heating – 36.9±0.1°C, before cooling – 36.8±0.2°C). Creatine kinase activity in blood serum 24 h after concentric load was significantly increased as compared to control values. Passive muscle warming increased muscle contraction force of knee extensors, but did not cause any changes either in the rate of muscle fatigue or in the rate of muscle recovery. Muscle cooling did not decrease muscle contraction force and did not increase muscle fatigue resistance. The findings of this study showed that both, muscle warming and muscle cooling, brought about a decrease in an indirect parameter of muscle damage – the amount of creatine kinase 24 h after concentric load.

BIOMECHANICAL STUDY ON A NEW TRAINING MACHINE AND METHOD FOR POWER AND STRENGTH

2005 ◽  
Vol 05 (02) ◽  
pp. 243-251 ◽  
Author(s):  
CHUAN-SHOW CHEN
Keyword(s):  
Muscle Contraction ◽  
Elastic Energy ◽  
High Frequency ◽  
Thrust Force ◽  
Biomechanical Study ◽  
Training Method ◽  
Sports Performance ◽  
Contraction Force ◽  
Basketball Players ◽  
Specific Effects

Strength and power are important in sports competition, and increasing ability of explosive muscle contraction force is key to winning for sports performance in events like jumping or throwing. In this study, Passive Repeated Plyometric (PRP) training method and the machine were designed. This machine allow one to training for top gear power with high frequency and without danger as compared with the conventional way of training like common way of plyomerics or using machine for isotonic muscle contraction. The PRP has it specific effects, which can be summarized as follow: 1. Motor driving PRP machine allow athlete training with high frequency, up to 300 rpm (0.2 Hz), especially for lower extremities to increase thrust force and force of body trunk. 2. PRP training method bring about the stretching reflex and elastic energy to recruit into a powerful muscle contraction. 3. This training machine formed a natural and powerful muscle contraction by stretching and shortening in a cycle of contraction, which is called stretching-shortening cycle or SSC. 4. Well-documented evidence from both theoretical and practical were achieved in 1998 Bangkok Asian game and the following Pusan2002 applying to track & field and basketball players.

Robustness of Muscle Synergies under Variant Muscle Contraction Force during Forearm Movements

2020 ◽  
Author(s):  
Hanjie Deng ◽  
Vincent C. K. Cheung ◽  
Yanjuan Geng ◽  
Mojisola G. Asogbon Samuel ◽  
Oluwarotimi Williams Samuel ◽  
...  
Keyword(s):  
Muscle Contraction ◽  
Muscle Synergies ◽  
Contraction Force
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