whatever gives the best chest pump.
this is the best answer.
everyone has different shoulder joint structure and lenght of arms, and muscle insertion.
there is no jack of all trades fits everyone reply.
what pumps the chest up best will be the best.very easy.
theres no stretching chest,or any muscle, muscle cant be stretched,its an idiotic bro science term, how you wanna stretch something thats firmly attacjhed to the bones by tendons,lol.
and theres no upper lower chest exercises,its always the whole chest being flexed.
what gives indivdual most severe pumps will be best.