the belief that all members of each race possess characteristics or abilities specific to that race, especially so as to distinguish it as inferior or superior to another race or races.
Racism: a belief that race is the primary determinant of human traits and capacities and that racial differences produce an inherent superiority of a particular race
So.....for what it's worth, imo, stating that "...If some races are genetically more likely to be good at some things.... like Kenyans and running for example...."
^ that's a racist statement imo. You could make hundreds of similar statements (Asian people excel at math, for example, is one I've heard before over and over again). Statements like that are extremely racist imo. The same applies to statements like "they are no good at swimming". What you're doing is placing certain charactristics and traits, be they positive or negative, to a group of people based soley on their race. If that's not clear to anyone, just go back and read the two definitions above lol. The definition of racism is pretty straightforward, no matter what source it's from. (well, almost lol).