Would a long time from any social interactions cause a human to experience unwanted symptoms of depression, or would it not affect them in any way.

Yes

Explanation:

Humans are social creatures, and so if you are isolated from other people you would likely undergo Social Isolation. Long periods of social isolation would cause a person to feel depressed, lonely, alone, etc.. Remember that being alone and being lonely are two different things.

these are common warning signs of overtraining syndrome:

washed-out feeling, tired, drained, lack of energy

mild leg soreness, general aches, and pains

pain in muscles and joints

sudden drop in performance

insomnia

headaches

decreased immunity (increased number of colds, and sore throats)

decrease in training capacity/intensity

moodiness and irritability

depression

loss of enthusiasm for the sport

decreased appetite

increased incidence of injuries.

a compulsive need to exercise

the answer is nerve impulses.

good