Multi-dimensional intervention programme Prior to the commencement of the study, the subjects were submitted to two weeks of training, two sessions per week, in order to be familiarized with the resistance-training exercises performed in the current study. During this familiarization period, a higher emphasis was placed on learning the proper exercise techniques, and brief pauses between repetitions were allowed in order to reset their starting positions when necessary. During the second week of the familiarization period, a pre-test of the motivational variables was performed, as well as measuring weight, height, BMI, FM and MM. Both pre-test and post-test were carried out in one day between 8:00 and 9:00 a.m. After the pre-test, the experimental group underwent a resistance-training programme for 12 weeks, where different motivational strategies were used. The resistance-training programme incorporated resistance exercises of six major regions and consisted in 3 training sessions per week on non-consecutive days (Monday, Wednesday, and Friday). The six regions were chest, back, triceps, biceps, shoulders and legs. The different regions were grouped into a circuit. The control group, on the other hand, did not participate in the resistance-training programme.