Author/Editor		Ušaj, A
Title		The increase of duration of isometric contraction may not relate to change of relative oxygenation of forearm muscle
Type		članek
Source		Pflugers Arch
Vol. and No.		Letnik 43, št. Suppl
Publication year		1996
Volume		str. R265-6
Language		eng
Abstract		The aim of this study is to ascertain, how an increase in duration of isometric contraction influences tissue ooxygenation of forearm musles, undergoing physical training. Four subjects underwent 6 weeks of training of the left forearm muscles by performing isometric contractions. Subjects repeated 10 s contractions, 10-15 times in the first, and 20 s contractions in the second 3 week period. Relative oxygenation of forearm muscles was measured by using Near Infrared Spectroscopy (CWS2000, NIM Incorporated, Philadelphia). The training increased the duration of isometric contraction at 20 kp of experimental forearm muscles by 41+-25 s, which was more (P less th. 0.05) than in control forearm (8+-4 s). This increase was not reflected in changes of maximum relative deoxygenation of experimental muscles, which decreased by only - 6.9 +- 14.4%. The results show that an increase in duration of isometric contraction may not depend on the oxygenation of muscle tissue at fixed force of 20 kp.
Descriptors		ISOMETRIC CONTRACTION MUSCLE, SKELETAL OXYGEN CONSUMPTION EXERCISE MIDDLE AGE OXIMETRY PHYSICAL EDUCATION AND TRAINING SPECTROPHOTOMETRY, INFRARED