One Repetition Maximum (1RM) was determined unilaterally with the indirect Holten-method using commercially available stack weight and fitness equipment for biceps, triceps, quadriceps and hamstrings. For each patient a test weight was defined so that patients would be able to achieve maximal 6 to 12 repetitions. From this number of repetitions the 1RM was calculated using the Holten diagram. The Holten diagram relates the number of repetitions to the percentage of maximum strength. The global score (kg) for the biceps, triceps, quadriceps and hamstrings exercise was calculated by taking the sum of the right and left arm or leg.