Skurvydas et al. (2002) Low frequency fatigue and recovery of quadriceps muscle in sprinters, long-distance runners and untrained men

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Low frequency fatigue and recovery of quadriceps muscle in sprinters, long-distance runners and untrained men

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CONTRIBUTORS:

	Author:	Skurvydas, Albertas (Lithuanian Academy of Physical Education)
	Author:	Mamkus, Gediminas (Lithuanian Academy of Physical Education)
	Author:	Kandratavicius, E.
	Author:	Mickeviciene, Dalia
	Author:	Sipaviciene, Saule
	Author:	Vitkiene, Irena

JOURNAL:

Ugdymas. Kuno Kultura. Sportas. Education. Physical Training. Sport, 3(44), 70 - 77.

YEAR:

2002

PUB TYPE:

Journal Article

SUBJECT(S):

Low frequency fatigue, Recovery, Sprinters and long-distance runners, Stretch-shortening exercise

DISCIPLINE:

Recreation, Sports & Leisure Studies

HTTP:

http://www.lkka.lt/zurnalas/z0203/mks_z020312.htm

LANGUAGE:

English

PUB ID:

103-426-000 (Last edited on 2006/04/13 01:46:15 GMT-6)

SPONSOR(S):

ABSTRACT:
To examine the effect of training status on muscle fatigue and recovery sprinters (S, n=9), long-distance runners (LDR, n=10) and untrained persons (UT, n=12) performed 100 intermittent (every 20 s) drop jumps from the height of 0.4 m with counter-movement to 90 degrees angle in the knee and immediate maximal rebound with maximal intensity. We measured vertical jump height, electrically stimulated (twitch, 10, 15, 20 and 50 Hz) and maximal voluntary knee extension force (MVC), before the exercise and 2 min, 20 min and 24 hours after the exercise. All measures were reduced (P<0.05) following the fatiguing exercise and had not returned to control by 24 hours. The reduction in vertical jump height were greater in UT and LDR than S. The reductions in contraction force during electrical stimulation were significantly (P<0.05) greater in UT as compared to S and LDR, with no difference between the two letter groups. There was a particularly marked increase in low frequency fatigue in all the groups of the muscles studied. The latter fact is substantiated by a marked decrease in the ratio of P20/P50 immediately after exercise as well as 20 min and 24 h following the exercise, if compared to the control value (P<0.05). Low frequency fatigue in UT, S and LDR, however, was alike. We conclude that the endurance training and fibre type composition are not important for development and recovery of low frequency fatigue induced by stretch-shortening type exercise.

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