Exercise Protocol All participants will be under supervision during participation in the progressive supervised resistance exercise-training program. They participate in an onsite supervised protocol for 12 weeks (6 days per week). Exercise duration will be increased gradually, from 50 min at week 1 to 80 min at week 12, including warm-up for 20 min and cool-down periods for 10 min by carrying out gentle stretching exercises of the upper and lower limbs. A one repetition maximum (1-RM) is the maximum weight that can be lifted for one complete repetition of the movement. For each participant, the RM will be calculated for a particular muscle group. Each movement will be carried out at 60-80% of his 1-RM. Resistance will be increased slowly by three steps; step 1 (60-70% of his 1-RM for week 1-4), step 2 (65-75% of his 1-RM for week 5-8) and step 3 (70-80% of his 1-RM for week 9-12).