The widespread use of electronic devices such as smartphones, tablets, and laptops has significantly increased screen exposure, especially before sleep. Prolonged screen use may contribute to poor posture by promoting forward head posture, rounded shoulders, and other musculoskeletal problems. In addition, screen exposure before sleep may negatively affect sleep quality and neuromuscular performance, which may in turn influence postural control and balance.

Postural disorders arise from the disruption of the natural alignment of the spine and are often associated with muscle imbalances, joint stress, and pain. Incorrect posture caused by prolonged technology use has been reported to increase the risk of musculoskeletal problems among young adults.

Dynamic balance is an important component of postural control and is influenced by the integration of sensory input and neuromuscular responses. Sleep disturbances and lifestyle habits, including excessive screen exposure before sleep, may affect this complex system.

Therefore, the aim of this study is to investigate the effect of screen time before sleep on posture disorders and dynamic balance in healthy young adults. Participants aged between 18 and 35 years will be evaluated for screen usage habits before sleep. Posture analysis and the Star Excursion Balance Test will be used to assess posture alignment and dynamic balance performance.

Inclusion Criteria:

• Healthy adults
• Aged 18 to 35 years
• Willing to participate voluntarily in the study

Exclusion Criteria:

• History of orthopedic injury or surgery affecting balance
• Use of medications that may affect attention or balance
• Refusal to provide informed consent

34 healthy volunteers between the ages of 18-35 were included in the study.