T he strength of muscle contraction is the ability of a muscle to contract whichdescribes the strength of the muscles in the upper extremities. Grip strength is a testthat reflects muscle strength, is non-invasive and affordable. In people with diabetesmellitus, there can be a decrease in the strength of muscle contractions due to thesmall amount of glucose transporter type 4 (GLUT 4) in the muscle plasmamembrane. This study aims to assess the relationship between HbA1c levels andmuscle contraction strength in DM patients.METHODThis research was conducted with an analytical observational design with a crosssectionalapproach. The subjects of this study had the inclusion criteria of type 2diabetes mellitus patients aged 18-60 years, while limb limitations or disabilitieswere the exclusion criteria. The sample size in this study was 52 subjects. Themethod of measuring the strength of muscle contractions was carried out using ahand-grip dynamometer and HbA1c based on the level of HbA1c in the subject'sblood. The relationship between variables was statistically analyzed by correlationtest dan Independent t-test.RESULTThe relationship between HbA1C levels and muscle contraction strength in DMpatients showed a weak negative correlation and was not statistically significant(r=-0.191; p=0.175). The relationship between sociodemographic factors andmuscle contraction strength showed a significant relationship for gender (p = 0.002;p < 0.05) but not significant for age (p = 0.227; p > 0.05), BMI (p = 0.167; p >0.05), as well as exercise habits (p = 0.992; p > 0.05).CONCLUSIONThere was no significant relationship between HbA1c and the strength of musclecontraction.There is a significant relationship between gender and the strength ofmuscle contractions, but not significant for the relationship to age, BMI, andexercise habits.