ankle/foot
We interact with the ground through our ankles and feet, which means they take a lot of beating throughout the day. Proper mobility of the many joints in the foot and adequate strength/control will decrease your chances of dealing with foot pain, knee pain, achilles tendinitis, and plantar fasciitis.
Muscles prone to tightness:
Gastrocnemius (calf)
Soleus
Muscles prone to weakness:
Tibialis anterior
Peroneals
Toe Extensors