01
Attach ReFlex
Place the sensor on the target muscle before your set. ReFlex begins capturing muscle activation signals in real time as you train.
HOW IT WORKS
Built for strength training.
ReFlex fits seamlessly into your existing workout, turning muscle activity into clear performance insights during every set.
02
Train Normally
Perform your exercise as usual. ReFlex automatically detects reps and tracks activation and fatigue throughout the set.
03
Get Results
After the set, activation and fatigue are summarized into clear performance scores so you can see how the muscle actually performed.
REALTIME FEEDBACK
Understand every rep.
In Realtime.
Automatic Rep Detection
ReFlex detects each repetition in realtime, eliminating the need for manual logging. Your workout is captured automatically, allowing you to focus entirely on execution.
Rep Level Activation
Monitor how muscle activation changes across every repetition. See how engagement evolves through the set and how performance shifts as fatigue accumulates.
Time Under Tension
See how long each repetition remains actively engaged. ReFlex tracks rep duration and reveals how tension builds and changes throughout the set.
PERFORMANCE ANALYSIS
Talk to your muscles.
Literally.
ReFlex translates activation and fatigue patterns into clear, actionable insight so you can understand how each session is shaping your performance.
PERFORMANCE TRENDS
Spot trends.
Break plateaus.
See how activation and fatigue change over time, so you can spot what’s working, what’s stalling, and what to adjust next.
What is ReFlex?
ReFlex is a wearable device that measures muscle activation and fatigue during strength training. By analyzing electrical signals produced by your muscles, ReFlex provides real-time feedback and performance insights for every set.
How does ReFlex measure muscle activity?
ReFlex uses surface electromyography (sEMG) to read electrical muscle signals while you train.
Do I need to change how I train to use ReFlex?
No. ReFlex is designed to fit into your normal training routine.
What exercises can I use ReFlex with?
You can use ReFlex with common strength exercises where consistent movement tracking is useful.
What metrics does ReFlex provide?
ReFlex surfaces activation, fatigue, set-by-set trends, and related workout context.
Do I need to use my phone during my workout?
You can train with minimal phone interaction and review deeper insights afterward.
Can I track multiple muscles?
Yes, depending on setup and training flow, you can track different target muscle groups.
How accurate is the data?
ReFlex is built to deliver consistent training signals to support better in-session decisions.