Final answer:
In the Warrior III yoga pose, the front knee should be kept straight, not bent, and the back foot should be flexed to ensure proper alignment and to engage supporting muscles.
Step-by-step explanation:
In the yoga posture known as Warrior III, also referred to by its Sanskrit name Virabhadrasana III, the proper alignment of the body is essential for balancing, strengthening, and achieving the full benefits of the pose. Specifically, in Warrior III, our front knee should not be bent; it is important to keep the standing leg straight while being careful not to lock the knee. This allows the muscles around the knee to remain engaged and supportive. Meanwhile, the back foot should be flexed. Flexing the back foot (i.e., pulling the toes toward the shin) helps to activate the muscles of the lifted leg, maintaining stability, and alignment throughout the pose.