Virabhadrasana III is challenging and believe me, once you master the posture there are myriad benefits that you take away from it.
The second pose in the series of three, Virabhadrasana II gives a nice stretch to your legs, shoulders, ankles and groins It is beneficial for the urinary tract among many others...
The posture engages your shoulders, arms, legs, ankles, thighs, back and glutes.