We provide tracking data of the analysed segments after filtering, cognitive performance data and indivdual force levels. To this end, the data set contains three zip-files of numbers of csv-files and an additional csv-file. In each csv-file, comma delimits information within the rows. Participant numbers range between 1 and 21 where the first 11 numbers always refer to the participants of the single-task training group and the final 10 numbers refer to the participants of the dual-task training group. The IndividualForceMaximum.csv includes separate rows of participant’s information about training group, individual force maximum, and the 10% value of the force maximum, which was important for adapting the required force to the individual applicable leg force. The CognitiveTaskData.zip contains four csv-files. Two files are for the TEST sessions, which include either the total number of responses or the number of correct responses per trial for each participant within a row. The other two files are for the TRAINING data (either total number of responses or number of correct responses) of the cognitive task for the participants of the dual-task training group. The file includes 15 trials of the first and the last five training days (i.e., days 1 to 5, and days 18 to 22). For each participant the training data is presented in a row. The tracking data is split with respect to the training groups in either the single-task training group, i.e., MotorTaskData_SingleTaskTrainingGroup.zip, or the dual-task training group, i.e., MotorTaskData_DualTaskTrainingGroup.zip. Each of the zip-files includes TESTING and TRAINING data in csv-files for each participant P separately. We further separated the TEMPLATE data and the PERFORMANCE data, i.e., for instance template test file of P1 corresponds with performance test file of P1. Each trial is presented in a row, where the header includes the segment information (i.e., first segment = 1, second segment = 2, and third segment = 3) for each data point. TEST data include trials with the practiced second segment and the catch trials with another second segment. TRAINING data include the 15 trials of the first and the last five training days (i.e., days 1 to 5, and days 18 to 22).