Physical

Physical does not mean your biggest strength. But means you with the maximum power can do much work for foreign, this involves your maximum force, the greatest endurance, strength should be refers to a personal body energy in maximum force under the condition of the continuous body continuously provide the amount of energy can continue.

Physical = muscle existing energy + (foreign energy for total/foreign body function quantity speed) * transformation of energy speed

Can DiGongLiang > foreign energy doing work speed

Everyone has different energies, and existing energy can be acquired through exercise to improve.

Everyone's transforming body energy at different speeds, this can also acquired through exercise enhancement, so, everyone's physical different.

But in general, the increase of physical with age, and the body's growth and increase. So, adults than kids to large physical.