Performance+ Test
Understand Your Performance—In Real Time
The SparkDX Performance+ Test gives you a clear snapshot of how your body is functioning right now—so you can make smarter decisions around activity, focus, and recovery.
Train smarter. Stay focused. Recover better.
Understand your performance and readiness
Get a real-time view of how your body is functioning by measuring key biomarkers like nitric oxide and pH—so you can better support endurance, focus, and recovery.
Simple, at-home performance testing
No blood. No needles. Just a quick saliva-based test you can do anywhere—delivering fast, real-time insights when they matter most.
Train smarter. Recover better.
Turn your results into clear, actionable insights to optimize workouts, improve recovery, and make confident decisions about activity and rest.
Choose Your Purchase Type
Single Purchase
$24.99
One Time Purchase includes 4 tests
Monthly Subscription
$19.99
Your monthly subscription includes X tests & free shipping
Free standard shipping on orders $50+
Free shipping on subscriptions
Secure CheckoutNitric Oxide, pH & Performance Signals
Why it matters: These markers reveal how ready your body is to perform, recover, and sustain energy.
Your body is constantly adapting based on activity, recovery, sleep, and stress. The Performance+ Test measures key biomarkers that reflect how prepared your body is to perform.
Nitric oxide supports blood flow and oxygen delivery, helping power endurance, strength, and focus. pH balance can influence fatigue, recovery, and how your body responds to physical demand.
By measuring these markers in real time, the Performance+ Test gives you a clear snapshot of your current performance state—so you can train smarter, recover better, and show up at your best.
So you can optimize performance, improve recovery, and make smarter decisions about your activity and routine.
Spark is changing thousands of lives
“Works like magic and the results are too quick!”
“Was hesitant but it worked really well”
“Works like magic and the results are too quick!”
“Was hesitant but it worked really well”
Customer Reviews
We're all about transparency. Read reviews by real people who use STIM Spark.
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Urvashi L
November 16, 2025
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat
Urvashi L
November 16, 2025
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat
Urvashi L
November 16, 2025
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat
Urvashi L
November 16, 2025
Benefits of Regular Testing
Why Testing Regularly Matters
One result is a snapshot. Patterns over time reveal more about your body.
Make Smarter Daily Decisions
Use personalized insights to better understand your body day to day.
Personalized Insights from Your Trends
Your data becomes clearer, more meaningful, and more actionable over time.
Why Testing Regularly Matters
One result is a snapshot. Patterns over time reveal more about your body.
Make Smarter Daily Decisions
Use personalized insights to better understand your body day to day.
Personalized Insights from Your Trends
Your data becomes clearer, more meaningful, and more actionable over time.
