I am currently exploring technologies where physiological sensing does not stop at detecting a change, but is connected to a physical response from the wearable itself. CalmWear is one of the clearest examples I have found of that full loop.
My sticky note captured the part that immediately stood out to me: the vest monitors heart-rate variability (HRV) and respiration rate (RR) and then responds through inflation and deflation. That makes it directly relevant to my current question of what biodata could actually control within a responsive wearable.
It also connects closely with my interest in pressure, compression and smart textiles as possible alternatives to a standard smartwatch notification.
CalmWear is a smart compression vest developed as a tactile sensory-stimulation garment for adults with anxiety disorders.
The garment combines two functions within the clothing itself. First, it monitors physiological signals using textile-integrated sensors. Second, it contains a pneumatic actuator that can inflate and create compression around the upper body.
The researchers describe the system as reactive smart clothing: the garment senses changes in the wearer and then physically acts back on the body.
This is important for my project because it moves beyond the idea of a wearable simply measuring physiology and displaying a warning. The clothing itself becomes the response device.
CalmWear monitors HRV and respiration rate in real time.
Heart activity is measured using embroidered ECG electrodes integrated into the lining of the garment. Respiration is monitored using a stretch sensor that detects changes associated with breathing.
The authors use changes in HRV and respiration rate as indicators of anxiety-related physiological arousal within the system.
For my own project, I need to be more cautious with that interpretation. HRV and respiration can change for many reasons, particularly during airport travel where walking, rushing, carrying luggage and cognitive effort may all affect physiology.
So the useful precedent here is the sensing-to-response architecture, rather than the assumption that these signals can identify anxiety or sensory overload with certainty.
The physical response comes from a textured inflatable air bladder built into the vest.
The bladder covers areas across the back, sides of the torso and shoulders while avoiding the chest and stomach. A miniature air pump gradually inflates the bladder, increasing compression around the body.
The system then adjusts and maintains the pressure using a pressure sensor and electronic control.
What interested me is that the response is not a single squeeze or vibration. The garment can inflate and deflate dynamically, allowing the amount of compression to change over time.