All beneficiariesindividualProfessional Marathon RunnersIdeas that could help Professional Marathon RunnersNIRS-Based Threshold TrainerA wearable sensor and app that identifies a runner's second ventilatory threshold (VT2) in real-time using muscle oxygen saturation (StO2) instead of expensive gas exchange tests.Why it helps: Allows them to maintain precise training intensities for interval work without the discomfort of a gas mask during testing.