The Growing Focus on Hydration
The 2026 World Cup has introduced mandatory hydration breaks in every match, a decision that has sparked debate among fans and pundits. While some view these breaks as disruptive or merely opportunities for advertising, the underlying theme of hydration is gaining increasing global attention. Andreas Flouris from the University of Thessaly highlights the scientific community's growing interest in hydration, particularly as climate change intensifies heatwaves and public health campaigns encourage increased fluid intake.
This heightened awareness has coincided with a surge in hydration-focused consumer electronics, ranging from wearable sweat monitors to advanced toilet-based urine analysers. These devices promise to help individuals maintain optimal hydration, but their accuracy and overall utility are points of discussion.
Addressing Dehydration: A Widespread Concern
Insufficient water intake is a common issue. A 2023 study in the UK indicated that a quarter of adults aged 65 or older were dehydrated. Furthermore, a 2018 study led by Flouris involving 139 European workers found that 70% were dehydrated to an extent that could impair cognitive function and motor control. Companies developing hydration technology assert that their products can mitigate these risks.
Roozbeh Ghaffari, CEO of Epicore Biosystems, notes that just as devices like the Apple Watch popularized step-counting, sweat analysis is becoming the next frontier. His company produces sweat-analysing wearables, including single-use patches and sleeve-like devices that track sweat rate, sodium content, and skin temperature. A new armband and app combination also aims to assess an individual's 'hydration readiness' using real-time sweat data, with some devices even vibrating to prompt fluid intake.
Effectiveness and Accuracy: A Debate
Epicore Biosystems' devices are utilized by athletes and workers in demanding environments such as construction sites, oil facilities, and airports, where high temperatures and physical exertion are common. However, Flouris expresses skepticism regarding the accuracy of many sweat-sensing devices he has evaluated in his lab, though his findings are yet to be published. He suggests that sweat sensors perform best during prolonged, consistent physical activity, such as a marathon, but may struggle with varied and intermittent exertion, like that experienced by a footballer.
Ghaffari counters that Epicore Biosystems has published peer-reviewed research on the accuracy of its products. He acknowledges that analyzing sweat loss over very short intervals (under 20 minutes) can be challenging, but states that their products are effective for workouts lasting 30 minutes or longer.
Beyond Sweat: Smart Bottles and Urine Analysis
Another popular category of hydration tech includes smart water bottles, which remind users to drink throughout the day. Cem Bakiş, head of business development at WaterH, describes their bottle's glowing ring that blinks to prompt sips, incorporating gamified elements like earning points and adding friends. Unlike bottles that estimate liquid volume by weight, WaterH uses sensors to detect when the bottle is tipped and the flow rate of fluid, aiming for immediate recognition of sufficient intake. Bakiş addresses criticisms of accuracy by stating that issues often stem from calibration and are easily resolved.
For those seeking a different approach, Vivoo offers a urine-analysing device that attaches to a toilet bowl. This gadget uses optical sensors to measure 'urine specific gravity' – an indicator of urine density, which generally correlates with hydration levels. While Vivoo's website clarifies its products are not for medical diagnoses, urine-based measurements are indeed used in scientific hydration studies. Flouris notes, however, that there can be a delay between dehydration onset and its detection in urine.
Potential for Anxiety and Unique Applications
Tamara Hew-Butler from Wayne State University finds hydration-monitoring gadgets 'interesting' but raises concerns about their potential to increase health-related anxiety. She suggests that an abundance of metrics, reminders, and goal-setting might not be beneficial for everyone, potentially adding an 'emotional burden.' Bakiş maintains that WaterH aims to help users 'build a habit,' not induce stress. Vivoo's spokeswoman acknowledges the concern but states their smart toilet technology is designed for 'passive, routine-based testing' to avoid constant app checking.
Hew-Butler identifies specific scenarios where hydration tech could be particularly useful, such as sweat monitors alerting coaches to dehydrated team members who might otherwise hesitate to speak up. She highlights that technology provides immediate results. Ultimately, while maintaining proper hydration is crucial, Hew-Butler reminds us that the human body possesses a considerable range of adaptability.
Source: Do you know your 'sweat score'? The rise of hydration tech