Award Date

1-1-1994

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Kinesiology

Number of Pages

55

Abstract

Muscle fatigue is a complex phenomena that involves both metabolic and neural factors. The present study examined the prolonged effects of localized muscle fatigue on lactate production during exercise. Five subjects, 3 females and 2 males, ages 25-29 (x = 27 {dollar}\pm{dollar} 1) participated in the study. Subjects completed a max VO2 test and two testing sessions, which consisted of cycling for 20 minutes at 80%-85% max VO2, once with prior fatigue and once without. Two-way repeated measures ANOVA showed gross lactate production was 20% higher in the non-fatigue trial than in the fatigue trial (9.3 {dollar}\pm{dollar}.03 vs. 7.6 {dollar}\pm{dollar}.04, p =.02). Net lactate production was 34% higher in the non-fatigued trial than in the fatigue trial (7.8 {dollar}\pm{dollar}.4 vs. 5.2 {dollar}\pm{dollar}.4, p =.006). RQ was higher in the fatigue trial than in the non-fatigue trial (.97 {dollar}\pm{dollar}.03 vs.89 {dollar}\pm{dollar}.03, p =.04). In conclusion, lactate production is less in a fatigued state than a non-fatigue state. This change can be attributed to an alteration in muscle fiber recruitment patterns.

Keywords

Effects; Exercise; Fatigue; Lactate; Localized; Muscle; Prior; Production; Submaximal

Controlled Subject

Physiology; Developmental biology; Physical education and training

File Format

pdf

File Size

1730.56 KB

Degree Grantor

University of Nevada, Las Vegas

Language

English

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