The Story of PACE: From Witnessing to Prevention

1. The Spark: Beyond Monitoring

Our journey didn't start in a lab; it started on a crowded street. One of our teammates witnessed a stranger mid-panic attack—a moment of raw, visible suffering that stayed with us. We realized that while the world is full of "wellness" apps that track how poorly we slept or how many steps we took, almost none of them intervene to stop suffering in real-time.

We built PACE for the millions who, like that stranger, feel like their body is a ticking time bomb. We wanted to move the needle from passive tracking to active prevention.

2. The Build: The Science of "Calm in Every Step"

Most wearables live on the wrist, but the feet are the "secret window" into the autonomic nervous system. PACE uses a dual-feedback loop between smart-textile socks and a mobile app.

The Detection

The socks monitor Electrodermal Activity (EDA) and Heart Rate Variability (HRV). We look for the "Somatic Spike"—a specific physiological signature that precedes a panic attack.

The Intervention

When the system predicts an imminent attack, the socks don't just alert the app; they physically respond through two haptic modes:

Thermal Shift: Rapidly changing to a user-selected temperature (hot or cold) to "shock" the nervous system back into the present.
Rhythmic Compression: The fabric uses micro-actuators to compress and release, mimicking a deep-breathing pace.

The physics of this calming pressure can be expressed as:

$$P = \frac{F}{A}$$

Where $P$ is the calming pressure applied to the foot, $F$ is the force of the smart-textile contraction, and $A$ is the surface area of the foot sensors.

The thermal intervention relies on the principle of heat transfer to ground the user:

$$Q = mc\Delta T$$

Where $Q$ is the thermal energy transferred to the skin to break the "panic loop," $m$ is the mass, $c$ is the specific heat, and $\Delta T$ is the rapid change in temperature.

3. The Challenges: Filtering the Noise

Building a "wearable that cares" came with two massive hurdles:

The False Positive Problem: How do we tell the difference between a user running for a bus and a user having a panic attack? We had to refine our algorithms to cross-reference heart rate spikes with specialized foot-sweat data (eccrine gland activity) that is unique to emotional stress.
Innovating the Medium: Moving away from the "standard" ring or watch was a risk. We had to research textile engineering to ensure the socks remained comfortable, washable, and high-performance while housing sensitive biosensors.

4. Lessons Learned: The Feet Know Best

The most "aha!" moment of this project was discovering just how much data our feet actually broadcast. They are among the most densely populated areas of sweat glands and nerve endings.

We learned that panic attacks are not inevitable. By intercepting the body's "Fight or Flight" signal before it reaches the brain's consciousness, we can change the outcome. We didn't just build a sock; we built a way for people like Melanie to trust their bodies again.