Welcome alecia777, as to the first question, an explanation such as you have posted here would be sufficient. The BI understands things like this.
The dummy drag, you don't know any dummies that would let you drag them? J/k. A duffel bag loaded with the amount of weight will do for practice.
If you haven't already started, push-ups etc. type of training will help build upper body strength.
Good luck.
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Ecclesiastes 8:11...
Because sentence against an evil work is not executed speedily, therefore the heart of the sons of men is fully set in them to do evil.