You’re asking for examples of wearables that use ExG sensors. ExG sensors are used in various fields, especially in health management and sports. ExG, short for Electro-X-Gram, refers to sensors that measure bioelectrical signals, with ECG (Electrocardiogram), EEG (Electroencephalogram), and EMG (Electromyogram) being representative examples. Let’s take a closer look at examples of wearable devices that utilize each ExG sensor, along with their characteristics and applications.

1. ECG (Electrocardiogram) Sensors:

• Smartwatches:
  • Apple Watch: Models from Apple Watch Series 4 onwards are equipped with ECG functionality, allowing for convenient ECG measurements from the wrist. The measured ECG data can be used to check for signs of heart conditions such as atrial fibrillation and can be shared with medical institutions for reference in medical examinations.
  • Samsung Galaxy Watch: Samsung Galaxy Watch also provides ECG functionality and, similar to the Apple Watch, is used for heart health monitoring.
  • Fitbit Sense: Fitbit Sense not only provides ECG functionality but also offers stress management features through the EDA Scan app.
• Chest-worn ECG Patches:
  • AliveCor KardiaMobile: A portable ECG measuring device used in conjunction with a smartphone, which can be attached to the fingers or chest to measure an ECG.
  • Preventice Solutions BodyGuardian HEART: A wearable ECG patch developed for patients who require long-term ECG monitoring.

Applications of ECG Sensors:

• Early diagnosis and monitoring of cardiovascular diseases such as atrial fibrillation and heart failure.
• Monitoring heart rate and ECG changes during exercise.
• Stress level measurement and management.

2. EEG (Electroencephalogram) Sensors:

• EEG Measuring Headbands:
  • Muse: An EEG measuring headband for improving meditation and concentration, which analyzes brainwave changes to provide feedback on meditation state or provides concentration improvement training.
  • Emotiv EPOC/Insight: EEG measuring headsets developed for research and professional use, which collect various EEG data and are used for brain function research, brain-computer interface (BCI) development, etc.

Applications of EEG Sensors:

• Sleep analysis and sleep quality improvement.
• Meditation and concentration training.
• Brain function research and brain-computer interface development.
• Monitoring of brain diseases such as epilepsy (for medical use).

3. EMG (Electromyogram) Sensors:

• Muscle Activity Measuring Bands/Patches:
  • Myo Armband: A band worn on the forearm to measure the electrical activity of muscles, used for gesture recognition, robotic arm control, etc.
  • Compex Wireless Muscle Stimulator: A product that combines a muscle stimulator and EMG sensor for muscle strengthening and rehabilitation training for athletes.
• Wearables for Sports:
  • By embedding EMG sensors inside sportswear, muscle activity during exercise is measured, supporting exercise posture analysis and efficient exercise training.

Applications of EMG Sensors:

• Measurement of muscle strength training effects and exercise posture analysis.
• Rehabilitation training and muscle function recovery.
• Prosthetic control and robotics.
• Gaming and virtual reality interfaces.

Development Directions of ExG Sensors:

• Improving Accuracy: Sensor technology and signal processing technology are continuously developing, aiming for precision at the level of medical devices.
• Improving Wearability: Small and lightweight wearable devices are being developed so that they can be used more conveniently in daily life.
• Convergence with Various Fields: Convergence with various fields such as VR/AR, games, and brain-computer interfaces, as well as healthcare and sports, is being attempted.

Wearable devices using ExG sensors are expected to further develop and play an important role in personal health management, exercise ability improvement, and technological development in various fields.