<![CDATA[This study examined whether pure Robusta coffee and instant coffee differ in their effectiveness for improving running performance among members of GB Runners Banjarbaru. A quantitative experimental approach with repeated measurements was used. Twenty-one community runners were selected through purposive sampling and completed a Cooper 12-minute run test under three conditions: pretest, posttest after pure Robusta coffee, and posttest after instant coffee. Coffee was administered approximately 60 minutes before testing at an intended caffeine dose of about 3 mg/kg body mass. Running performance was evaluated by distance covered during 12 minutes. Data were analyzed using descriptive statistics, Shapiro–Wilk normality testing, the Friedman test, and Wilcoxon signed-rank tests. Mean running distance increased from 2.595 km at pretest to 2.933 km after pure Robusta coffee and 2.857 km after instant coffee. The Friedman test showed a significant difference among the three conditions (χ² = 36.390, df = 2, p < 0.001). Pairwise Wilcoxon tests showed significant differences between pretest and pure Robusta coffee (Z = −4.015, p < 0.001), pretest and instant coffee (Z = −4.015, p < 0.001), and pure Robusta and instant coffee (Z = −2.958, p = 0.003). Thus, both coffee treatments improved running performance, while pure Robusta coffee produced a significantly greater improvement than instant coffee.]]>
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