Are activities that specifically increase muscle strength, endurance, and size.

I believe the answer is: weight lifting and shoveling snow

Weight lifting would break down the muscle fiber in your body, and would be rebuilt into stronger muscles if you consume enough protein.

Endurance would be increased by doing slow impact physical activities for a long period of time, such as shoveling snow.

what do we need our phalanges for?

the psychologist would claim that the research results were significant.