i am interested in sports psychology. i have done lots of reading and research in to the mindsets of various sports, predominantely soccer, but not weight training (which i also see as a sport, before any one jumps on my back!

the basic idea in dwecks book, and my own belief is that there are 2 mindsets, a fixed mindset and a growth mindset.
behind the fixed mindset is the belief that you have natural talent. this belief will cause you to be more easily put off attempting something that will challenge you. you do not want your percieved natural talent to appear false, you want to protect the label. the failure of a challenge is taken personally. you will also see things as beyond your control (because your ability is pre-set), and feel that no amount of work will get you to a certain point. this is demotivating and will stop you persuing your goals.
a person with the growth mindset however, views everything as improvable. that your talents, physical and mental, and malleable (look in to brain plasticity). people with such a mindset see failure as an opportunity to improve, its not taken personally. they are not afraid to try new things and have no preconcieved notion of a natural superiority to "protect".
that is the background to my view. what i wanted to know is how this relates to weight training...
in soccer, while you may be more psychically endowed in certains ways to an opposing athlete, everything you do within the sport must be learnt, as their is a mental process behind it all. simply, its a man made game how can it come natural to some?
in weight training however, you have mesomorphs, ectomorphs, and endomorphs (my knowledge here is limited, feel free to correct me!). each with differing physical potential (is this the correct word?).
baring this in mind as an example (im hoping people can chip in with better examples haha!), is the motivational process and mindset different for people in weight training and competitive weight lifting?
what are peoples views on mindsets, and natural ability? (although that is not strictly psychology and can be ignored if desired by the moderators?)
ive tried to make this interesting and clear, pull me up if it isnt.