Why is it a myth that athletes need more protein

If you are having a hard time lifting something, you should arch your back. a. true b. false

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Asubstitute is standing at the halfway line waiting to enter the match at the next stoppage of play the ball has gone over the touchline for throwing and referee allows for the substitution to substitute wants to take the throw-in does the substitute first have to enter the field of play before being allowed to take the throw-in