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Articles by Novita Sari Harahap
Total Records ( 2 ) for Novita Sari Harahap
  Novita Sari Harahap , Nurhayati Simatupang and Suprayitno
  Background and Objective: The increase of oxidative stress has negatively impacted several constituent components of cell membrane which include lipid peroxidation to form malondialdehyde (MDA), also related to liver function in which will release alkaline phosphatase enzymes. The purpose to know the protective of red dragon fruit (RDF) extract in strenuous exercise indicate the increase of MDA and alkaline phosphatase. Materials and Methods: The subject are 24 white male rats aged 3 months, weight of 200 g. They are grouped into 3 behavioral groups of 8 each. The strenuous exercise without red dragon fruit extract (SE-RDF) group: given treatment of strenuous exercise without the extract from RDF, the strenuous exercise with red dragon fruit extract 100 mg kg1 b.wt., (SE+RDF 100) group: a treated with strenuous exercise and being given 100 mg kg1 b.wt., of RDF extract and the strenuous exercise with red dragon fruit extract 200 mg kg1 b.wt., (SE+RDF 200) group: given a dosage of 200 mg kg1 b.wt. Results: The group SE+RDF 200 has the lowest malondialdehyde is 0.48 nmol mL1 and alkaline phosphatase is 116.38 U L1.The highest malondialdehyde is 0.78 nmol mL1 and the highest alkaline phosphatase is 191.13 U L1 is found at the group SE-RDF. Conclusion: The groups with strenuous exercise and being given 200 mg kg1 b.wt., are better in responding to oxidative stress by having lower malondialdehyde and alkaline phosphatase compared to the other group.
  Novita Sari Harahap , Aznan Lelo , Ambrosius Purba and Diky Setya Diningrat
  Background and Objective: Explosive power movement in a 200 m race will potentially yield free radicals. The energy source of a 200 m runner, based on his movement, comes from anaerobic predominant metabolism, which also potentially yield high lactic acid. The increase in lactic acid causes the decrease in pH which tends to suffer from acidosis so that the establishment of ATP is hampered and cause pain in muscles. This condition can influence the performance of the 200 m runners. The objective of the research was to find out the influence of combination of weight training with sport massage, on the change in glutathione peroxides (GPX) and lactic acid elimination in the 200 m runners. Materials and Methods: The research used experimental method with pre and post test design. The research subjects were 20 students of Faculty of Sports Science, Medan State University, who had not been trained as 200 m runners and had fulfilled the inclusive and exclusive criteria, taken by using random sampling technique. Students were divided into two groups: WT+SM (Combination of weight training with sport massage) group and WT-SM (weight training without sport massage). The treatment was performed in 8 weeks with the frequency of exercise 3 times a week. Results: The research showed that there was significant influence of the treatment (p<0.05) in the pre and post treatment in the WT+SM group and in the WT-SM group on the mean value of increase in glutathione peroxides content and the mean value of decrease in lactic acid content in 200 m runners. There was no significant difference (p>0.05) of the increase in glutathione peroxides in 200 m runners in the post treatment done by WT+SM group and by WT-SM group. There was significant difference (p<0.5) in the mean value of decrease in lactic acid content in the 200 m runners in the post treatment done by WT+SM group and by WT-SM group. Conclusion: Combination weight training with sport massage was better in increasing glutathione peroxides content and decreasing lactic acid content in the 200 m runners than that of only weight training.
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