Increased muscular strength increases the stability of your joints. (traineatgain.com)
One recent study, however, found significant effects in muscular strength (one repetition maximum) and cycle performance (10 - second sprint) following three weeks of testosterone administration. (scientificamerican.com)
While it was originally created as a form of rehabilitation, it's been also widely used for improving muscular strength and mobility of specific muscle groups in terms of athletic training. (fitnessandpower.com)