Muehlbauer T, et al. - The authors aimed to determine non-discriminant relationships between leg muscle strength, lean tissue mass (LTM) and gait performance in healthy young and old adults. They found no preferential association between gait speed and leg muscle strength or leg LTM, favoring neither outcome for predicting mobility. Therefore, they suggested that both leg muscle strength and leg LTM ought to be tested and trained complementarily. Moreover, hip and ankle extension torque predicted gait performance. Hence, they recommended to test and train healthy old adults by functional integrated multiarticular rather than monoarticular lower extremity strength exercises.