I have a problem and hope u guys in the forum will be able to help me for those who is a top thrower , please help me.
Since last year i was first and javelin and shot put , but that was because due to the lack of participation in our sch ( strong one nv throw).Then this year there is a cocky guy , telling me that he will thrash me in these 2 event this year.
Since my victory last year was sheer luck , i needed some advices this year to teach me how to train up in order to throw better and also increase your throwing strength ( i already know the steps to throwing ).

. What should i do ??
And 1 last question , is the throwing of javelin and shot put requires the Biceps or the Triceps or even both??