This observational study will aim to investigate the effects of cigarette addiction on lower extremity motor coordination and movement speed in young adults. The study will include healthy participants aged 18-25 years, divided into smokers and non-smokers. Motor coordination will be assessed using the Lower Extremity Motor Coordination Test (LEMOCOT), and speed will be evaluated with a 30-meter sprint test. Nicotine dependence will be evaluated in smokers using the Fagerström Test. The findings will provide insight into the possible functional impacts of nicotine addiction on motor performance.

The study will be conducted as a non-randomized controlled observational trial at the Faculty of Health Sciences, Department of Physiotherapy and Rehabilitation. A total of 24 healthy young adults (12 smokers, 12 non-smokers) will participate. The inclusion criteria will require participants to be aged 18-25, cooperative, literate, and able to walk independently. Participants will be categorized as smokers based on WHO and DSM-IV-TR criteria. The primary assessments will include LEMOCOT and 30-meter sprint test. Nicotine addiction will be measured using the Fagerström Test for Nicotine Dependence (FTND), and anthropometric data including BMI and bimalleolar diameter will also be recorded. Data will be analyzed to determine any statistical differences or correlations between smoking status and motor performance outcomes.

Inclusion Criteria (for both groups):

• Age between 18 and 25 years
• Able to walk independently
• Literate and cooperative
• Willing to participate voluntarily
• BMI between 18.5 and 29.9 kg/m²

Additional inclusion for smokers:

• Daily smoking for at least one year based on WHO and DSM-IV-TR definitions
• Exclusion Criteria (for all participants):
• Orthopedic, neurologic, or neuromuscular disorders affecting gait
• Chronic cardiopulmonary disease
• Cognitive impairments
• Obesity (BMI ≥ 30 kg/m²)

Additional exclusion for smokers:

• History of acute cardiovascular events
• Chronic heart failure or lung diseases

The study population will consist of healthy young adults aged between 18 and 25 years. A total of 24 participants will be included, with 12 individuals who meet the criteria for cigarette dependence and 12 who do not smoke. Participants will be recruited from a university setting using convenience and snowball sampling methods. All participants will be required to be cooperative, literate, and able to walk independently. They will also be screened to ensure a body mass index (BMI) between 18.5 and 29.9 kg/m². Smokers will be identified based on the World Health Organization (WHO) definition and the DSM-IV-TR diagnostic criteria. Individuals with orthopedic, neurologic, cardiopulmonary, or cognitive impairments will be excluded.