| Summary: | 碩士 === 國立臺灣師範大學 === 體育學系 === 96 === Abstract
Purpose: The purpose of this study was to examine the effects of caffeine ingestion on delayed onset muscle soreness (DOMS) in men of different fitness levels. Methods: Ten high fitness level (HF; VO2max＝54.5 ± 3.75 ml/kg/min) and ten low fitness level (LF; VO2max＝44.7 ± 3.06 ml/kg/min) college males performed a 30 minutes downhill running (-15% ) to elicit DOMS. All subjects ingested caffeine 24 or 48 hors after exercise induced DOMS under double-blind controlled. We measured maximal voluntary isometric contractions (MVIC), perceived muscle soreness scale, creatine kinase (CK), lactate dehydrogenase (LDH) and histamine activity one hour before and after caffeine ingestion. Data were analyzed by a mixed design two-way ANOVA. Results: After caffeine ingestion, HF and LF of participants were significantly increased in MVIC force % (HF：7.0 ± 9.9 %, LF：5.1 ± 10.8 %) than placebo ingestion (HF：-0.1 ± 4.7 %, LF：0.4 ±5.2 %; p＜.05), in addition, the muscle soreness scale % (HF：-18.2 ± 22.2 %, LF：-11.9 ± 11.3 %) was significantly reduced than placebo ingestion (HF：7.2 ± 18.5 %, LF：1.7 ± 11.5 %; p＜.05). However, there was no significant difference between two fitness levels in CK, LDH and histamine activity. Conclusions: 10 mg ･ kg-1 body weight dose of caffeine could increase the MVIC and reduce pain after exercise induced DOMS, and these effects independent of fitness level.
Key words: caffeine, DOMS, fitness level
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