Empirical evidence suggests that the use of short videos is associated with decreased feelings of loneliness and social isolation, thereby reducing depression among older adults . Platforms that allow users to showcase aspects of their own lives also serve as a significant avenue for achieving "happiness in old age" and enhancing social interactions with acquaintances . Therefore, this study aims to provide robust evidence on the effectiveness of nano-learning interventions, particularly in the context of sarcopenia, where addressing physical and psychological well-being has become increasingly critical among this cohort.

Nanolearning is an innovative pedagogical strategy that delivers content in highly focused, ultra-short learning experiences, often lasting less than two minutes, aimed at teaching a single skill or topic . Typically offered digitally through bite-sized video lessons or interactive practice exercises, it capitalizes on learners' preference for short-form content and informal learning methods, making knowledge acquisition more accessible and manageable for busy individuals. A defining feature of nano-learning is its brevity, with lessons intentionally kept under two minutes to align with contemporary learning habits, such as engaging with short-form videos on platforms like YouTube Shorts and TikTok . Empirical evidence suggests that the use of short videos is associated with decreased feelings of loneliness and social isolation, thereby reducing depression among older adults . Platforms that allow users to showcase aspects of their own lives also serve as a significant avenue for achieving "happiness in old age" and enhancing social interactions with acquaintances . Therefore, this study aims to provide robust evidence on the effectiveness of nano-learning interventions, particularly in the context of sarcopenia, where addressing physical and psychological well-being has become increasingly critical among this cohort.

Inclusion Criteria:

• Participants were eligible if they were 60 years or older,
• had a diagnosis of sarcopenia based on a cut-off score of ≥3 of the Sarcopenia Geriatric Scale (SARCO-GS) (Rosas-Carrasco, 2023),
• able to communicate effectively, and provided informed consent.

Exclusion Criteria:

• Exclusion criteria encompassed severe cognitive impairment, debilitating chronic conditions, or unstable medical status that could hinder participation.
• Cognitive function was assessed using the Montreal Cognitive Assessment (MoCA), with a cutoff score of 25 or below used to exclude participants (Nasreddine, 2005).