This invention discloses a method and
system for monitoring exercise fatigue based on multimodal biometric recognition, relating to the field of exercise health monitoring technology. The method includes: simultaneously acquiring surface
electromyography (EMG),
muscle thickness, and inertial data; decomposing EMG signals to reconstruct pure signals and artifacts, and generating reliability weights based on
inertia; extracting electrophysiological features from EMG, constructing
hysteresis loops from thickness and angle to extract mechanical features, and extracting emotional features from
inertia; inputting the three types of features into an
adversarial network to decouple and output pure fatigue features; inputting the data into a
hidden Markov model to decode the current state and predict the next cycle; fusing the prediction vector, fatigue features, and weights, generating fused features via a graph network and self-attention, outputting a level and labeling the type. This invention solves the problems of dynamic changes in
signal quality leading to fused weight mismatch, difficulty in distinguishing fatigue sources, lack of evolutionary prediction, and low cross-individual
adaptation efficiency, achieving high-precision and interpretable real-
time exercise fatigue monitoring.