The rapid transformation of the digital ecosystem has profoundly influenced the reading habits of upper-elementary school students, particularly in sustaining engagement with long-form texts. This study aims to investigate the lived experiences of upper-elementary students and classroom teachers regarding the phenomenon of long-text reading stamina in a digital environment. Employing a qualitative approach with an Interpretative Phenomenological Analysis (IPA) design, data were collected through in-depth semi-structured interviews with probing techniques, non-participant classroom observations, and documentation. The participants consisted of nine upper-elementary students across grades IV to VI and three classroom teachers from an elementary school in Bandung. The findings indicate that reading stamina in the digital environment is not merely the capacity to sustain physical reading duration, but a dynamic and adaptive self-regulated learning process. Students navigate digital distractions and visual fatigue by deploying metacognitive strategies such as chunking texts into paragraphs, re-reading complex sections, and utilizing external aids including peers, teachers, search engines, and artificial intelligence. Teachers perceive that the decline in reading stamina reflects a shift toward shallow, fast-paced information consumption rather than a deficiency in basic decoding skills. Print and digital media function complementarily; print supports contemplative deep reading, whereas digital media facilitates rapid lexical and conceptual clarification. Pedagogical efforts must prioritize explicit metacognitive strategy training, goal-oriented reading tasks, and adaptive teacher scaffolding over repressive screen-time restrictions.