The effect of moderately hot environment on performance and fatigue evaluated by subjective experiment of long time exposure

Masaya Nishikawa, Naoe Nishihara, Shin Ichi Tanabe

Research output: Contribution to journalArticle

5 Citations (Scopus)


In this study, a subjective experiment was conducted in a climatic chamber to investigate the effect of moderately hot environment on performance, fatigue, and especially the relationship between performance and fatigue. The climatic chamber was conditioned at operative temperature of 25°C (insulation value of 0.96clo), 28°C (insulation value of 0.96clo), and 28°C (insulation value of 0.61clo). Fourteen subjects were exposed in the environment for six hours. In this experiment subjects' performance at 28°C condition was lower than at 25°C condition, while they felt fatigue more strongly at 28°C condition than at 25°C condition. Besides, correlation between personal rates of complaints of fatigue and performance in z-score was observed with correlation coefficient of -0.72. From the linear regression model, increase in 10% of fatigue corresponded to the decrement in z-score by 0.083point.

Original languageEnglish
Pages (from-to)525-530
Number of pages6
JournalJournal of Environmental Engineering
Issue number638
Publication statusPublished - 2009 Apr 1



  • Addition task
  • Fatigue
  • Performance
  • Productivity
  • Thermal environment

ASJC Scopus subject areas

  • Environmental Engineering

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