This database is collected by the Biodynamics lab of Imperial College London. It consists of 180 subjects. Ground reactions forces (GRFs) are captured for all 3 axes: medio-lateral (GRF X), anterior-posterior (GRF Y), and vertical (GRF Z). Reported GRFs are normalised to the subject weight (kg/N). L stands for the left leg and R for the right leg. Each subject provided 1-3 trials whereas data when the subject does not clearly strike the force plate were excluded. M stands for male subjects, F for female subjects and pain is assessed via the Knee injury and Osteoarthritis Outcome Score (KOOS) questionnaire. Concerning previous injury and surgery, 0 declares presence and 1 absence. The latter is also applicable for knee osteoarthritis.

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More details can be found in the paper: The Complexity of Human Walking: A Knee Osteoarthritis Study, by Margarita Kotti, Lynsey Duffell, Aldo Faisal, and Alison McGregor that is published in PLOS ONE.