Believe Sleeve — Feel Your Body. Trust Yourself. Perform.

The Problem

Fear Is Invisible.
Its Effects Aren't.

Every gymnast knows that feeling. You're ready. Your body knows the skill. And then something shifts — and you can't explain it, can't name it, can't stop it. Coaches can see your form. Nobody can see your fear.

You Don't Know When Fear Strikes

Stress responses fire before you consciously register them. By the time you feel anxious, your muscles have already tensed, your technique has already shifted, and your window for correction narrows significantly.

Coaches Only See the Outside

Your coach sees everything on the outside. They watch your arms, your feet, your posture. What they can't see is what's happening inside — the heart rate spike, the stress signal firing, the tension building before the skill. The data that matters most is invisible to everyone in the gym.

Wearables Solve the Wrong Problem

Fitness trackers count your steps. Smartwatches monitor your sleep. But no wearable currently on the market is designed specifically for in-moment fear detection and real-time athletic feedback. That's the gap the Believe Sleeve is built to fill.

Training Doesn't Transfer

You nail every skill in practice. Then competition day arrives and something changes. The pressure, the silence, the judges — and suddenly the skill that felt automatic feels impossible. Without data that bridges practice and competition, you're left guessing at what went wrong.

Without Believe Sleeve

On the Beam. 30 Seconds to Go.

Your heart is pounding. Your forearms are tighter than they should be. Something feels off — but you can't name it, can't quantify it, can't tell if it's fear or fatigue or just nerves.

You hesitate. The moment passes. You bail the skill or push through with compromised form.

And afterward, there's nothing to learn from. No data. No answers. Same thing happens next competition.

With Believe Sleeve

On the Beam. 30 Seconds to Go.

The sleeve detects your EDA spiking and EMG tension climbing above your baseline. You feel a brief warm pulse on your wrist, the cue you've trained with for weeks.

Your nervous system knows what it means. You exhale. Shoulders drop. Tension releases. Your body does exactly what it's practiced ten thousand times.

After practice, you review the data. You know exactly when fear hit, how you responded, and how to train that specific moment.

The Technology

How It Actually Works

The Believe Sleeve works quietly in the background during every practice session. Four sensors are continuously asking one question: is this athlete approaching a fear response? When the answer is yes, the cue fires — before the moment is lost.

Step 01

Sense

Four sensors read your body simultaneously, up to 50 times per second (target). Heart rate picks up cardiovascular arousal. EMG reads the involuntary muscle tension that builds before a difficult skill. EDA catches the earliest stress signal your body produces — often before you feel anything at all. And the IMU tracks whether your movement patterns are starting to shift.

❤ HR: cardiovascular arousal

⚡ EMG: muscle over-tension

🌡 EDA: earliest stress signal

📐 IMU: movement pattern shift

Step 02

Detect

The onboard processor compares all four streams against your personal baseline, established in the first 60 seconds of each session. No two athletes respond to pressure the same way. A spike in heart rate on its own is just effort. A spike in heart rate combined with rising EDA and elevated EMG together may indicate a hesitation response.

Detection logic

HR + EDA + EMG all exceed personal baseline threshold simultaneously within a 2-second window. One sensor spiking is noise. All three spiking together may indicate a fear response.

Step 03

Cue

With a target response time under 300 milliseconds, the Peltier module fires a gentle thermal pulse against the wrist. Cool means engage, focus, drive. Warm means relax, breathe, reset. The cue lasts under 2 seconds. It's quiet, invisible to judges and coaches, and designed to cut through the mental noise that makes verbal reminders useless under pressure.

Why thermal, not vibration

Temperature is processed differently by the nervous system than vibration or sound — which is why thermal cues may be harder to tune out under pressure.

Step 04

Learn

After each session, the companion app shows a complete timeline of your physiological state. Every spike is logged — the skill, the timestamp, what the sensors were reading. Over weeks, patterns start to emerge. You learn which skills your body fears before your mind does. And your coach sees data they've never had access to before.

The goal

Over time the athlete stops needing the cue. The body learns the reset on its own. That is what winning looks like.

The Companion App

Data your coach has never seen

The Believe Sleeve app connects over Bluetooth and displays a real-time physiological dashboard during practice. After each session, it generates a report showing every stress spike, which skills triggered them, and how your fear response is trending over time.

In Development

The app is currently being designed alongside the hardware. Waitlist members will be the first to test it.

What the App Shows

Live sensor dashboard — heart rate, EMG, EDA, and motion in real time during practice

Session timeline — every stress spike logged with timestamp and skill context

Trend analysis — week over week improvement in fear response and cue dependency

Coach sharing — exportable reports so coaches have physiological data to work with

Feedback Intensity Simulation

❄

Cool Cue

Engage · Focus · Drive

♨

Warm Cue

Relax · Breathe · Reset

The Feedback

A Cue Your Body Understands

When the sleeve detects stress, it fires a small thermal pulse against your wrist. Not a buzz. Not a beep. A temperature cue — gentle enough to feel, quiet enough to ignore if you need to.

Temperature is processed differently than sound or vibration, which may make it easier to notice even when everything else is loud. Over repeated sessions, you may begin to associate the warm pulse with calm — and eventually respond to it automatically.

No screen. No sound. No distraction. Just a signal your body can learn to trust.

❄

Cool pulse = engage

Fires when energy is too low or focus drifts. A nudge to activate, sharpen, and drive. Most common on floor run-ups, vault approach, and second rotation.

♨

Warm pulse = calm down

Fires before the stress peaks. A prompt to exhale, release, and reset before the moment is gone. Most common before beam dismounts, bar releases, and floor landings.

All temperature changes are brief (under 2 seconds) and gentle, comparable to picking up a cool glass of water.

The Experience

From Unboxing to Competition Day

The Believe Sleeve is designed to disappear into your training — something you put on and forget is there, until the moment it matters.

👕 01

Put It On

Slide it on like any compression sleeve. The sensors are designed to calibrate to your baseline in approximately 60 seconds. No gel. No wires. No setup routine.

📊 02

Train With It

Train the way you always do. The sleeve works silently in the background, recording your physiological state throughout the session — every spike, every moment of tension, every wave of calm.

❄ 03

Feel the Cue

When the sleeve detects a stress response, a gentle thermal pulse fires. You breathe. You release. You reset. Over time, that response becomes instinct.

🏆 04

Review & Improve

After practice, open the app and see your session mapped out. When did your stress peak? Which skill triggered the most tension? How did your body respond to the cue? For the first time, training has answers.

BELIEVE

The Founder

This Project Is Personal.

Layla Kelch

Founder · Level 8 Gymnast

STEM Leader · Class of 2029

The Believe Sleeve wasn't born in a research lab. It was born on a gymnastics floor, from a question Layla couldn't stop asking herself after years of searching for an answer that nobody could give her.

There is a skill in gymnastics called a roundoff back handspring, back tuck. Layla could not do it for years. Not because she wasn't strong enough. Not because she hadn't trained it. Her body simply refused. The moment she set up for the skill, something would shut down and she had no idea why. Her coaches couldn't see it. Nobody could name it. It just wouldn't click.

That mental block followed her from Level 5 through Level 7. Every season felt like playing catch-up. The next level was always just out of reach. What she knows now is that it was fear, and fear left unrecognized doesn't go away. It just gets louder.

She spent years feeling stuck in her own body, watching other athletes move past skills that had stopped her cold. And she kept asking the same question: why is there no tool, no signal, nothing that can show an athlete what their body is doing in that moment?

That question is where the BelieveSleeve started. Not in a research lab. Not in a classroom. On a floor mat, failing a skill over and over while nobody could see the real reason why.

She built this for every athlete who has ever felt stuck and had no way to understand it. The BelieveSleeve is her AlphaX STEM innovation project, combining sports psychology, biomechanics, and wearable technology. Built by someone who doesn't just understand the problem intellectually, but has felt it.

"I built the Believe Sleeve because fear doesn't just hurt your performance. It becomes injury. Athletes deserve a tool that catches hesitation before their body pays for it."

— Layla Kelch, Founder

Background

Layla is a 9th grade student-athlete from Central Texas completing her first year of high school with a 4.0 GPA across honors and dual-credit coursework, including Honors Biology, Honors Geometry, AP Human Geography, and College Algebra through Kilgore College.

As a competitive gymnast, she advanced through Levels 4, 5, and 6 in under two years and has competed at the regional level, most recently at Regionals in Oklahoma City. She is now advancing to Level 8 as an optional gymnast, with aspirations to compete on the United States Air Force Academy Women's Gymnastics team.

In Civil Air Patrol, Layla serves as Cadet Chief Master Sergeant and First Sergeant. She has attended the USAFA Gymnastics Camp four consecutive years, experiences that have strengthened her commitment to earning an appointment to the Academy as a member of the Class of 2033.

Credentials

4.0 GPA — Honors & Dual-Credit

Honors Biology, Geometry, English I, AP Human Geography · College Algebra through Kilgore College · 9th grade

Level 8 Optional Gymnast — Regional Competitor

20–24 hrs/week training · Levels 4→6 in under 2 years · Regionals, Oklahoma City · Advancing to Level 8

Civil Air Patrol — Cadet Chief Master Sergeant & First Sergeant

Cadet leader and mentor · On track to earn the Spaatz Award, the highest achievement in the Civil Air Patrol cadet program, projected by junior year

Goal: United States Air Force Academy, Class of 2033

Aspires to compete on the USAFA Women's Gymnastics team · USAFA Gymnastics Camp attendee, four consecutive years

AlphaX STEM Innovation — Believe Sleeve

Wearable technology · Sports psychology · Biomechanics · Built from personal athletic experience

Who It's For

Built for Athletes Who Compete

It starts with gymnastics — the sport that asks more of the brain-body connection than almost any other. But the fear response doesn't belong to one sport.

🤸

Gymnastics

"My body freezes every time the pressure is real."

No other sport puts an athlete more alone — on the apparatus, under the lights, in silence. The Believe Sleeve's initial design is built around gymnastics, with beam, bars, floor, and vault in mind from the very first prototype.

🏃

Track & Field

"I overtense at the block every single time."

In explosive sports, milliseconds separate winners from the field. EMG data on starting block tension, arousal level at race start, and the patterns that build before a false start give coaches something they've never had before.

🎯

Precision Sports

"The pressure just gets in my head."

Archery. Shooting. Diving. Figure skating. Golf. Any sport where the difference between a great performance and a collapsed one lives entirely in the athlete's head. The Believe Sleeve is built for exactly that space.

Technical Specs

What's Inside

Current planned hardware for the v1 prototype. Subject to change based on testing and feedback.

Microcontroller	ESP32-C3 (WiFi + BLE)WIP
Heart Rate Sensor	MAX30101 Optical PPGSourced
EMG Sensor	Myoware 2.0 / Custom ElectrodesWIP
EDA / Stress	GSR Skin Conductance (2 electrodes)WIP
Motion (IMU)	ICM-42688 (6-DOF Accel+Gyro)Sourced
Thermal Feedback	Peltier TEC1-12706 + DRV8837C driverSourced
Power	LiPo 3.7V / 500mAh (target 4–6hr session)
Form Factor	Forearm compression sleeve, target ~8oz
Connectivity	BLE to companion app (in development)
Data Logging	On-device SD card + BLE stream

Development Roadmap

Phase 1

Bench Prototype

All sensors wired on breadboard. Firmware reading and logging all 4 data streams. Peltier safety-tested.

In Progress

Phase 2

Wearable Form Factor

Sensors integrated into a sleeve. Wireless data transmission. First real-body wear testing.

Up Next

Phase 3

Athlete Testing

Beta testers from gymnastics programs. Data collection. Feedback loop. Algorithm refinement.

Planned

Phase 4

V1 Launch

Refined hardware, companion app, coach dashboard. First limited production run for early adopters.

Planned

Early Access

Help Build This

The Believe Sleeve is in active development. Your honest feedback directly shapes what gets built. Takes 2 minutes, and it genuinely matters.

Part 1 of 4 — About You

Your Name *

Email Address *

Your Age

Your Location (optional)

Your Role *

How long have you been in gymnastics?

Part 2 of 4 — The Problem

Have you ever hesitated on a skill you already knew how to do?

Yes, frequently

Yes, occasionally

Rarely

Has fear or hesitation ever affected your performance or caused an injury?

Yes, it caused an injury

Yes, hurt my performance

Not yet

Describe a specific moment when fear or hesitation got in the way. What happened?

Part 3 of 4 — The Believe Sleeve

Overall, how interested are you in something like this? (1 = not at all · 10 = I need this now)

Which features would matter most to you? Select all that apply.

Knowing in real time when my stress is spiking during a skill

The physical thermal cue to help me reset mid-performance

Seeing my muscle tension data after practice

Finding patterns in when fear is affecting my performance over time

Sharing my physiological data with my coach

Reducing my risk of hesitation-related injury

Building confidence through data and feedback over time

Would you wear this in practice? In competition? Why or why not?

Part 4 of 4 — Honest Feedback

What concerns or doubts do you have about this idea?

What would make the Believe Sleeve better? Any suggestions?

Any other thoughts you want Layla to know?

✓

You're On the List

Thank you. Your feedback has been saved and will directly shape what gets built.
We'll reach out when the first prototypes are ready for real-world testing.