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The purpose of this study was to determine effect of red guava juice to changes in MDA levels in the blood of atheletes after getting physical activity sub-maximum, difference effect between a high pulse and low pulse rate on the results of MDA levels, effect of red guava juice 100 grams and 150 grams of the MDA levels in the blood, understand the interaction between red guava juice and pulse on the results of MDA. The study used an experimental design. The study population is athelete in Garuda Bintang Football School amount 63 people. Sample study of 16 people who were taken using purposive sampling technique. The sample consisted of 8 players who get physical activity sub-maximum (pulse) high and 8 players getting physical activity sub-maximum (pulse) is low. The instrument used to retrieve the data are: (1) physical activity such as running 2400 meters (2) measurement of pulse rate and (3) test MDA (Malondialdehyde). Data collection techniques to test and measurement Data analysis techniques used ANOVA. Keywords— red guava juice, sub-maximal pulse, MDA (malondialdehyde).

The Effect of Red Guava Juice to MDA (Malondealdehyde) Levels on The Athletes in The Garuda Bintang Football School Getting Sub-Maximal Physical Activity