SaltStick FastChews and Nix Biosnesor

Sweat Science

electrolytes and performance explained

Electrolytes can be the difference between finishing as a champ, or struggling with fatigue, cramping and nausea. These small but mighty elements — sodium, potassium, calcium, magnesium and chloride — play a pivotal role in muscle contraction, blood pressure, and keeping you cool (i.e sweat).

Put simply, if you're not replacing electrolytes during your training, your performance will tank.

That's all great, you might say, but I need specifics. Like, do I need more electrolytes on hot days? What about humidity? Or altitude? Do I take electrolytes before, during, or after training? How do I figure out how much water to drink?

All great questions, and like many aspects of nutrition, it depends. Everyone sweats differently. Even your own sweat rate and concentration can vary widely, depending on temperature, level of fitness, altitude, or humidity.

It can get confusing fast, so to help demystify, we're following the journey of five athletes as they dive into "Sweat Science." Each athlete will test their sweat rate, electrolyte loss rate, and sweat composition using the Nix Hydration Biosensor, which provides athletes with personalized hydration data in real time. Athletes will then use their sweat data to adapt their fluid and electrolyte intake accordingly.

Follow along as our team breaks down the science behind what's working and what's not, so you can build a knockout hydration routine of your own.

Nix Biosensor

Thank you to Nix Biosensors for partnering with us!

The Nix Biosensor is the first biosensor to analyze sweat and provide endurance athletes with personalized hydration data -- scientifically validated and delivered in real time.

Athlete Deep Dive: Danielle Lao

Sport: Tennis

Skill Level: Professional

Light Sweater

Tune in to the @SaltStick Instagram account to watch Danielle discuss her testing results live on September 14th, 2023 at 7 pm EST.

“I have many peers who have benefited from getting their sweat tested, but I’ve never taken the plunge myself. I’m excited to learn more about my sweat rate and how that impacts my performance on the tennis court,” says Danielle.

We'll post Danielle's results later this summer.

Danielle Lao

Other Athletes

Stay tuned to follow their hydration journeys as well!

Taggart VanEtten
Nikkia Raedawn
Ben Hoffman
IG Live Schedule calendar

Calendar of Events

Throughout the summer, we will be hosting Instagram Live sessions and other events. See below for the schedule and mark your calendars!

  • Kickoff Session IG Live -- Tuesday, July 18th @ 6pm EST
  • Giveaway Open -- July 18th-July 31st
  • Taggart VanEtten IG Live -- Thursday, August 18th @ 7pm EST
  • Ben Hoffman IG Live -- Thursday, August 24th @ 12pm ET
  • Danielle Lao IG Live -- Thursday, September 14th @ 7pm EST
  • Nikkia Raedawn IG Live -- Wednesday, September 20th @ 7pm EST
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Nix Hydration Biosensor

Recommended for workouts of 45 minutes or longer, our lightweight durable hydration monitor quantifies when, what, and how much to drink (water or electrolytes) while analyzing your sweat moment-to-moment. The rechargeable pod clips onto a single-use sweat patch before the start of each workout to read and transmit data to the Nix app. It integrates with your smartphone or watch to deliver personal hydration data in real time providing hydration intelligence to improve your athletic performance, safety, and wellbeing.


Nix Hydration Biosensor Starter Pack

Sweat Patch Refills

Nix Sweat Patch Refills include four single-use sweat patches to be used in conjunction with the reusable Pod before each new workout. The Sweat Patch sticks to the bicep via adhesive and is completely non-invasive. We recommend wearing a patch during a sweat inducing workout, ideally running or cycling, lasting at least 45 minutes in duration. After your run or ride is complete, a post-workout summary in the Nix App provides intel that can help inform your hydration strategy going forward.


Nix Biosensors Refill Pack

Check out our IG Live session!

To kick off this partnership, Jess Cerra (SaltStick VP of Innovation) chatted with Meridith Cass (Nix CEO) to cover all things sweat science.