Exploring the Impact of Circadian Rhythm on Employee Performance

The study explores how circadian rhythms—biological cycles regulating sleep-wake patterns—influence employee performance, particularly in relation to sleep quality, chronotype, cognitive functioning, and decision-making. Using a descriptive research design and primary data from a diverse employee sample, the study examines key variables through Pearson correlation and Chi-square analysis. Findings indicate that quick sleep initiation correlates with improved refreshment, concentration, and mental sharpness. Morning-type individuals show higher focus and greater sensitivity to irregular shifts, while evening types report reduced decision-making confidence during early evening hours. These results support the role of circadian alignment in cognitive performance. By integrating subjective perceptions with empirical analysis, the study highlights the need for chronotype-aligned scheduling to optimize workplace efficiency and well-being, particularly in sectors with irregular shifts such as healthcare, manufacturing, and education. The insights offer practical implications for Indian SMEs and similar organizational settings. Keywords: circadian rhythm, employee performance, chronotype(morningness-Eveningness), sleep quality, fatigue, biological clock, cognitive performance.