geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Quantification through the surface EMG of muscle fatigue and recovery during successive isometric contractions


, : Quantification through the surface EMG of muscle fatigue and recovery during successive isometric contractions. Aviation, Space, and Environmental Medicine 52(9): 545-550

The surface electromyogram (EMG) was analyzed from above the handgrip muscles of the forearm in six male volunteer graduate and medical students during brief and fatiguing isometric contractions in order to assess the influence of successive isometric contractions on the amplitude and frequency components of the surface EMG. Isometric contractions were sustained at three tensions; 25, 40 and 70% of each individual's maximum voluntary strength (MVC). Two successive isometric contractions were conducted in each series of experiments. The interval between these contractions was set at 2, 4, 6, 8, 10, or 12 min. In the first series of experiments, the second contraction in the series consisted of a fatiguing isometric contraction conducted at the same tension as the first contraction. In the second series of experiments, the second contraction was an MVC. From the data, a computer program was written to predict the degree of fatigue and recovery following fatiguing isometric contractions. The program was based on an analysis of the frequency components of the EMG and proved to be quite useful for showing fatigue and recovery in this muscle group.

US$29.90

PMID: 7283904


Other references

Fotherby, K., 1959: The isolation of pregn-5-ene-3 beta:16 alpha:20 alpha-triol from the urine of normal males. Biochemical Journal 71(2): 209-210

Anonymous, 1973: Breeding plants for disease resistance concepts and applications. Part 1 of this useful text on general considerations, concepts and terminology contains several contributions from the editor. These cover: the meaning of disease resistance, pathogen variation, use of resistance genes to curb pathogen population...

Keck, B.M.; Bennett, L.E.; Fiol, B.S.; Daily, O.P.; Novick, R.J.; Hosenpud, J.D., 1995: Worldwide thoracic organ transplantation: a report from the UNOS/ISHLT International Registry for Thoracic Organ Transplantation. The number of heart transplant operations performed in the United States has grown modestly as indicated by an 11% increase from 1990 (n=2,108) to 1994 (n=2,340). From 1987 (n=18) to 1993 (n=666), lung transplant procedures have increased by 3600%...

Clark, M.J., 2005: Forensic. Lancet 366(9494): 1351-1351

Choukroune P., 1980: Structural study of basaltic rocks showing brittle deformation; Deep Sea Drilling Project legs 51, 52, and 53, sites 417 and 418. Initial Reports of the Deep Sea Drilling Project Vol

Singh, D.; Saini, M.S., 1995: New sawflies of the genus Tenthredo Linn. (Hymenoptera, Symphyta, Tenthredinidae) from India. Annals of Entomology (Dehra Dun): 131: 9-13

Schulte-Hermann, R.; Leberl, C.; Landgraf, H.; Koransky, W., 1974: Liver growth and mixed function oxidase activity dose dependent stimulatory and inhibitory effects of alpha bhc. Naunyn Schmiedeberg's Archives of Pharmacology 285(4): 355-366

Karkkainen, M.; Uusvaara, O., 1982: Factors affecting the quality of young pines. A total of 140 Scots pine plantations (9-25 yr) and 31 natural stands (12-25 yr) in southern and central Finland was examined for various quality characteristics, such as branchiness, crown shape and diameter, and stem defects. Basic density and r...

Ocampo, M.T.A.; Chaung, W.; Marenstein, D.R.; Chan, M.K.; Altamirano, A.; Basu, A.K.; Boorstein, R.J.; Cunningham, R.P.; Teebor, G.W., 2002: Targeted deletion of mNth1 reveals a novel DNA repair enzyme activity. DNA N-glycosylase/AP (apurinic/apyrimidinic) lyase enzymes of the endonuclease III family (nth in Escherichia coli and Nth1 in mammalian organisms) initiate DNA base excision repair of oxidized ring saturated pyrimidine residues. We generated a nu...

Chin, Y.M.; Wan Ariffin, A.; Lin, H.P.; Chan, Y.S., 1996: Concordant childhood acute lymphoblastic leukemia in monozygotic twins. Two 4-year-old monozygotic Chinese, female twins developed concordant childhood acute lymphoblastic leukemia (ALL) within an interval of about 2 weeks. Based on morphology and cytochemistry findings of the bone marrow blast cells, a diagnosis of A...