Water is essential to our body. It helps to digest foods, makes up a large portion of our blood volume, helps maintain our blood pressure, is a large component of our muscles (~80% of your muscles are water!), and helps to regulate our body temperature. Not only can dehydration impact your mood, but it can also impact your work in the heat.

Working in the heat is already hard enough mentally and physically. But if you’re dehydrated on top of that, you will experience even greater physiological strain, and you might notice that your mood and cognition are worse too. This combination of being dehydrated AND working in the heat will increase the odds of accidents at work, decrease your performance, and increase your risk for heat-releated injuries and illnesses. But don’t worry, there is an easy fix for this…. drinking water!

So how do you stay hydrated throughout the work day?

  • Start by drinking a glass of water when you wake up in the morning. Starting your day hydrated will help to keep your core temperature lower by allowing for your body to sweat adequately (and get rid of heat) throughout the work day.
  • If possible, carry a water bottle with you throughout the day to make drinking water easy and accessible. If it’s not cold water, don’t worry about it. Although it may not be pleasant to drink, warm water won’t necessarily make you hotter.
  • Don’t limit your water intake and always drink when you’re thirsty.
  • NIOSH & OSHA recommend drinking ~8 oz water (1 cup) every 15-20 minutes. But may not be the correct amount for you. For a more accurate hydration plan, you’ll need to calculate your normal sweat rate. Kenzen can help you & your team with this. But for right now, you can weigh yourself before vs. after your workday to figure out exactly how much water you lost (through sweating).

Rule of thumb: you need to drink 20 oz. (about 1.5 water bottles) of water per pound of body weight lost through sweating.

  • Limit alcohol intake. Alcohol dehydrates you and impacts your body’s ability to properly regulate body temperature.

  • Good news: if you regularly consume caffeine, it will not impact your hydration or your ability to work in the heat. So don’t worry about having your 2-3 cups of coffee or tea each day.

How can you check to make sure you’re staying hydrated?

Your urine color (in the toilet bowl) should be a lemonade color (or lighter). This is the easiest way to check that you’re hydrated.

If you’re using a porta-potty where it’s hard to see your urine color in the toilet bowl, you can count how many times each day that you have to use the restroom.

If you’re urinating at least 7 times per day, you’re hydrated. Any less than 5 times per day and you’re likely dehydrated. This would mean that you’re urinating at least once every 2 hours or so.

Glass of water

Three tricks to increase your water absorption:

  1. Lightly salting your foods (especially during the first two weeks you’re working in the heat) can help your body to absorb more water.
  2. Drinking fluids with electrolytes (especially sodium) will help to absorb the water you drink. Just watch those sugars in the drinks- you don’t need them!
  3. Your body can only absorb water at a certain speed… what that means is that you need to pace yourself in drinking the water back after working hard in the heat. You can’t just “chug” a bunch of water at the end of the work day— you will just urinate it out.

Rule of thumb: your body can absorb ~8 oz. (half of a water bottle) every 15 minutes, so try to pace your water drinking to that rate.



  • Armstrong, Lawrence E., et al. “Urinary indices of hydration status.” International journal of sport nutrition 4.3 (1994): 265-279.
  • Kenefick, Robert W., et al. “Quantification of chromatographic effects of vitamin B supplementation in urine and implications for hydration assessment.” Journal of Applied Physiology 119.2 (2015): 110-115.
  • Burchfield, J. M., et al. “24-h Void number as an indicator of hydration status.”European journal of clinical nutrition 69.5 (2015): 638-641.
  • Tucker, M. A., et al. “Reliability of 24-h void frequency as an index of hydration status when euhydrated and hypohydrated.” European journal of clinical nutrition (2016).
  • Ely, Brett R., et al. “Hypohydration and acute thermal stress affect mood state but not cognition or dynamic postural balance.” European journal of applied physiology 113.4 (2013): 1027-1034.
  • Armstrong, Lawrence E., et al. “Mild dehydration affects mood in healthy young women.” The Journal of nutrition 142.2 (2012): 382-388.
  • Shirreffs, Susan Margaret, et al. “Post-exercise rehydration in man: effects of volume consumed and drink sodium content.” Medicine and Science in Sports and Exercise 28.10 (1996): 1260-1271.
  • Bain AR, Lesperance NC, Jay O. Body heat storage during physical activity is lower with hot fluid ingestion under conditions that permit full evaporation. Acta Physiol (Oxf). 2012;206(2): 98–108.


Despite the fact that heat-related injuries and illnesses (including heat stroke) are 100% preventable, the incidence of heat-related injuries and illnesses continues to rise each year. The heat-related death rates of crop workers is 19 times higher than that of all U.S. civilian workers!

Why? Because most worksites do not have any heat-education safety training for their employees or proper emergency cooling set-up in place to save workers’ lives.

A study of OSHA citations issued between 2012 and 2013 revealed 20 cases of heat-related illness or death of workers [Arbury et al. 2014]. In most of these cases, employers had no program to prevent heat illness, or programs were deficient; and acclimatization was the program element most commonly missing and most clearly associated with worker death. 

Kenzen is here to help with the launch of our worksite Heat Safety Program.

Worker on the job in hot sunlight


  • Heat education & safety training to all employees

  • Emergency cooling training

  • The equipment necessary to employ emergency cooling

  • Workplace assessments to recommend specific work/rest schedules for your workers

  • Individualized hydration plans for any workers at your site (to prevent the added stress of dehydration)

  • Heat acclimatization prescriptions for workers

This comprehensive package will ensure that your employees understand the signs & symptoms of heat injury & illness, what to do in an emergency situation, how much water to drink to stay hydrated, and how to balance work/rest schedules for optimal performance and productivity.

Let Kenzen help you keep your employees safe- remember: heat-related injuries and deaths are 100% preventable.

Start now & get more information here.

Reference: Jacklitsch, B., Williams, W. J., Musolin, K., Coca, A. P., Kim, J. H. P., & Turner, N. P. (2016). Occupational exposure to heat and hot environments. Department of Health and Human Services. National Institute for Occupational Safety and Health (NIOSH).



worker sweating

Sweating is the primary way that we cool ourselves off when our temperature starts to get too high.

But if your sweat isn’t evaporating or being wicked away (and is just dripping off of you), then it’s not actually cooling you down. Your body temperature will continue to increase – now much faster – and you won’t be able to work as long.

This is often why working in a hot AND humid environment feels a lot worse than in a hot-dry environment. Aside from being harder to cool your body down, your sweat does not evaporate as well in a humid environment. Sweat begins dripping off of you because the surrounding air molecules simply can’t hold any more water.

Heavy uniforms (like PPE) also prevent sweat from evaporating. Because you are unable to cool down, your body temperature will continue to rise. And, your body temperature will rise at an even faster rate when wearing heavy PPE.

5 Tips to Stay Cool on the Job

  1. Use an electric fan to stay cool and help the sweat evaporate
  2. Towel your skin dry as much as possible. Or, consider wiping your sweat off and away from your body. Pooled, or dripping sweat left on your body can actually decrease your sweat rate and cause you to overheat during work!
  3. Take frequent breaks and seek shade or covered areas.
  4. If possible, remove any extra clothing/uniform that may be preventing the sweat from evaporating during rest breaks.
  5. Drink plenty of pure water to replace the sweat (water) you’re losing from your body.

If you’d like the Kenzen team to help train your workforce on the importance of heat safety, schedule an on-site OSHA heat safety training session and gain early access to Kenzen Patch.

Learn more here »



Live from Shanghai this Week

As mentioned earlier this month, we were thrilled to be named an Honoree for the 2018 CES Asia Innovation Awards. The CES Asia Innovation Awards celebrates outstanding product design and engineering in brand-new consumer technology products from CES Asia exhibitors.

After this exciting announcement, Technode named Kenzen Best Health Startup as part of the CES Asia Startup Awards. Key quotes from the Technode article below:

“The Consumer Technology Association (CTA) announced today that CES Asia 2018 Startup Park will boast the largest exhibition since its inception, with more than 100 of the most innovative exhibitors from across the world expected to showcase their latest technology. To honor those with the greatest potentials to lead future investment and technology development trends, TechNode will present a new awards program, CES Asia Startups Awards.”

“We are thrilled to have TechNode producing the CES Asia Startup Awards highlighting some of the most anticipated innovations across the technology industry,” said John T. Kelley, senior director, international programs and show director, CES Asia. “Startup Park attendees will experience the next generation of breakthrough technologies drawing some of the world’s best and brightest startup communities, and even possibly witness the birth of the next ‘Unicorn!’”

“CES Asia Startup Awards will showcase startups with breakthrough technology, and discover the true force of innovation from China and around the world,” the Founder & CEO of TechNode, Dr. Lu Gang, noted.”

CES Awards 2018

A Very Big Thank You to Swissnex China

We are here at CES together with Swissnex China. Swissnex China “acts as a platform to foster the exchanges among creative thinkers between Switzerland and China”.

We are stationed in the CES Asia 2018 Startup Park, which boasts “the largest exhibition since its inception, with more than 100 of the most innovative exhibitors from across the world expected to showcase their latest technology.” We are located at the SNIEC Hall N4.

Read More:



September 5, 2018 (Minneapolis) – Sofia Fund, a leading angel investment group focused on high-growth, women-led early stage companies, today announced its most recent investment in Kenzen, a San Francisco-based health analytics platform focused on predicting and preventing avoidable health conditions. Kenzen is the maker of Kenzen Patch™, a wearable vital sign and sweat-analysis system that continuously monitors parameters needed to detect heat-related injuries in workers and at-risk individuals.

The Sofia Fund investment brings Kenzen’s total amount raised to $7 million, which will be used for product enhancements and acceleration of market adoption of the Kenzen Predictive Workforce Solution. The Kenzen platform uses real-time biosensor data and predictive models to detect heat-related health events before they occur. Patches on workers monitor sweat rate, heart rate, body temperature and active time in high-risk and extreme environments. The solution is currently gaining substantial traction globally with paid pilot projects in the U.S., the Middle East and Japan.

“Kenzen is exactly the type of company Sofia Fund looks for – a company of women founders and leaders in science and tech who create products that truly have an impact in the marketplace,” said Joy Lindsay, Sofia Fund partner. “Kenzen technology is at the intersection of Internet of Things (IOT) wearables, sensors and data analytics, all areas of great promise for product innovation. With the diversity and solid structure of its leadership team, we believe Kenzen is set for up for success in this exciting space.”

Kenzen is the second company Sofia Fund has added to its portfolio this year. Sofia Fund also invested in Joylux, a femtech company that creates innovative health solutions targeting the enormous but underserved female intimate care market. Sofia Fund has also made follow-on investments in two of its existing portfolio companies.

“An infusion from an investor like Sofia Fund is particularly meaningful to our team,” said Jim McDonnell, who became CEO of Kenzen after the passing of co-founder Dr. Sonia Sousa. “Sonia always recognized the power of diverse teams to propel businesses to success. Like the partners at Sofia Fund, she was an inspiration to many women founders and entrepreneurs”.

About Kenzen

Kenzen is an innovator in personal health monitoring and predictive analytics designed to empower its users in the field of precision health and safety. With real-time sweat biomarker analysis, the award-winning Kenzen Patch continuously measures sweat, vital signs and a key set of biometrics. Kenzen helps companies, teams and individuals to reduce injuries, optimize their health, and prevent against adverse health conditions by delivering highly personalized insights and notifications. Learn more at

About Sofia Fund

Sofia Fund invests in and grows exceptional women-led companies to maximize returns for investors by bringing its portfolio companies successfully to profitable exits. Sofia Fund uses a rigorous process for selecting and investing in high-growth, technology-driven opportunities. Its team of professional women angel investors actively manages and supports its portfolio businesses, leveraging deep expertise and broad networks to help women entrepreneurs achieve success. Its investment team has invested more than $10 million in 50 companies to date. For more information about what makes a business fundable, see For more information about Sofia Fund, visit

This release originally appeared on the Sofia Fund website.