Want to be happier at work? Here's the secret to greater productivity and better mood

High summer temperatures significantly reduce workplace productivity, according to recent studies and expert opinions. This phenomenon, often referred to as "summer fatigue," affects both physical and cognitive performance, leading to decreased efficiency among workers. The impact of heat on human productivity has been well-documented, with research indicating that even moderate increases in ambient temperature can lead to substantial declines in work output.

The human body functions best within a narrow temperature range. When external temperatures rise, the hypothalamus—a region of the brain responsible for regulating body temperature—activates defense mechanisms such as sweating and vasodilation to prevent overheating. These processes consume significant amounts of energy, which would otherwise be used for cognitive tasks such as maintaining attention, working memory, and problem-solving. Studies conducted by researchers at the Helsinki University of Technology and the Lawrence Berkeley National Laboratory have shown that office worker productivity peaks around 22°C. For each degree Celsius above 25°C, productivity decreases by approximately two percent. At 30°C, this translates to nearly an hour of lost effective work time during an eight-hour workday. Dehydration further exacerbates these issues, as even mild fluid loss—between one and two percent of body weight—can cause headaches, impair short-term memory, and disrupt concentration.

Employers play a crucial role in mitigating the effects of high temperatures on their workforce. According to advice from organizations like the UK's Acas, employers should ensure a "reasonable" temperature in the workplace. Neglecting thermal stress not only impacts productivity but also increases the risk of errors and accidents. Research indicates that the risk of injury rises by five to seven percent when temperatures exceed 30°C, and by ten to fifteen percent when temperatures surpass 38°C. Practical measures include ensuring proper air conditioning and ventilation, strategically placing fans where cooling systems are unavailable, providing free and easily accessible drinking water to prevent dehydration, and implementing flexible work schedules that allow employees to avoid working during the hottest parts of the day.

Modifying dress codes to permit lighter clothing can significantly enhance comfort levels. Special attention must be given to vulnerable groups such as pregnant women, older individuals, and those with chronic health conditions, who may require additional breaks and adapted working conditions. Employers should also consider the use of ergonomic furniture and adjustable lighting to create a more comfortable and productive environment.

Individuals can take several steps to combat the effects of heat on their productivity. Adjusting the workspace is essential. During the hottest part of the day, windows should remain closed, and blinds or curtains should be drawn to prevent sunlight from entering. Rooms should be ventilated early in the morning and late in the evening. Unused electronic devices should be turned off, as computers, monitors, and chargers generate additional heat. If working from home, consider temporarily moving the workstation to the coolest area of the house, such as the basement or ground floor.

Adjusting work rhythms can also help maintain productivity. The most demanding tasks requiring maximum concentration should be completed in the early hours of the day. Time management techniques such as the Pomodoro method—working in intervals of 25 minutes followed by short five-minute breaks—can be beneficial. Breaks should be used for hydration, stretching, or washing with cold water. Diet plays a vital role as well. Heavy and fatty meals should be avoided, as they can burden digestion and increase body temperature. Instead, opt for light and healthy foods that provide sustained energy without causing discomfort.

In addition to managing heat-related challenges, maintaining physical activity throughout the workday is important for overall well-being. Recent studies published in the British Journal of Sports Medicine suggest that brief five-minute walking breaks, known as "movement snacks," every hour can improve mood and reduce fatigue without negatively affecting work performance. Researchers from Columbia University found that taking short walks every hour led to the greatest improvement in productivity, mood, and alertness compared to other intervals. These findings highlight the importance of incorporating regular movement into daily routines to counteract the negative effects of prolonged sitting and heat exposure.

Employers and employees alike need to recognize the significance of creating a balanced and supportive work environment that addresses both thermal comfort and physical well-being. By implementing practical strategies and fostering a culture that prioritizes employee health, workplaces can mitigate the adverse effects of high temperatures and promote a more productive and positive atmosphere. As climate change continues to influence weather patterns globally, proactive measures will become increasingly necessary to safeguard both productivity and employee welfare.