Does this person have:
A) medial tibial stress syndrome (shin splints)?
B) medial meniscus inflammation?
C) plantar fascitis?
D) Achilles tendinopathy?
What are we looking at specifically? It’s a not often looked for symptom and that is reduced tibialis anterior/posterior activation. Thus limiting inversion at the mid-foot in toe standing. In this case in the left foot.
If you chose A you’d probably see the same on both sides. C & D would give you reduced heel lift.
B, however would be caused by this as it transfers load to the medial knee. So well done if you got this right.