1. In an electronic computer-based training system, a computer-assisted method for developing a training program for a trainee, the method comprising: profiling the trainee by processing physiological data, psychological data and training program data associated with the trainee, wherein the psychological data include data indicative of the motivational characteristics of the trainee, wherein the profiling further includes: (i) receiving at least a portion of the physiological data and psychological data from the trainee through a health screen questionnaire completed by the trainee prior to the trainee initiating training activity in accordance with a training program generated by the training system, (ii) assessing at least one contraindication of the trainee prior to the trainee initiating training activity in accordance with a training program generated by the training system, wherein the contraindication is a contraindication against undertaking the training program; and (iii) determining whether to create a training program for the trainee in response to assessing the contraindications of the trainee prior to the trainee initiating training activity; designing a training program for the trainee in accordance with the profile of the trainee, the training program being executable on a computer-readable memory medium; electronically receiving training activity data communicated by a monitoring device operatively associated with the trainee in an electronic computer system in the training system in association with the trainee performing at least one training activity, wherein the training activity includes a physical exercise activity and the training activity data include physiological data acquired during the trainee performing the training activity, wherein the electronic computer system includes a computer processor and at least one data storage medium; automatically electronically modifying at least a portion of the training program in the training system with the computer system in accordance with at least the communicated training activity data, limiting the modification up to a predefined maximum allowable variance from initial said profiling of the trainee; providing motivational feedback to the trainee electronically through the computer system in accordance with the trainee performing the training activity, the motivational feedback being generated by the computer system based on the trainee's performance of the training activity relative to the training program, the motivational feedback including at least text or graphic information selected by the computer system for motivating the trainee in association with performing the training activity; and tailoring delivery of the motivational feedback to the trainee based on the psychological data obtained from profiling the trainee.