So, all physical tests would basically be any skill test that uses Strength, Physique, Agility, or Coordination, right? This means a typical Corporate Soldier with Str 10 and Physique 10 can carry 20 Enc worth of equipment before taking a +1 Difficulty on all major tests and up to 39 Enc before taking +2 Difficulty.
What does 20 Enc look like?
If we take Capitol, we get Tortoise Mk 1 for 6 Enc, an M50 for 5 Enc, a Bolter or Ironfist for another 3 Enc, a Basic Medkit (1), and Tactical Webbing Waldos (3 free Enc) for a total of 11 net Enc before Ammo. The trooper can carry 9 Enc worth of ammo before being Encumbered.
That's not so bad, but the Tortoise is fairly light. It gets really bad if you are an Imperial. :-)
-Apoc527