Answer:
If you are unfit you may be unable to move around and that could effect your life. If you are disciplined and are good ad working with others, people will know your a good person and say " Hey lets get him for the job".
Explanation:
neck circles
tilting your head back could possibly demage your spine and vertebras
YES
workout sessions should be limited to twice a week,
work on several different muscles groups,
increase the weights only when you can do 3 sets of 10 repetition with ease