Alter Self é do Transmutação (Polimorfo) escola mágica, como tal, você perde todas as habilidades extraordinárias e sobrenaturais que dependem da sua forma:
While under the effects of a polymorph spell, you lose all extraordinary and supernatural abilities that depend on your original form (such as keen senses, scent, and darkvision), as well as any natural attacks and movement types possessed by your original form. You also lose any class features that depend upon form, but those that allow you to add features (such as sorcerers that can grow claws) still function. While most of these should be obvious, the GM is the final arbiter of what abilities depend on form and are lost when a new form is assumed. Your new form might restore a number of these abilities if they are possessed by the new form.
Sobre Sprinter traço racial, eu diria que também está perdido se você mudar de forma para ser de outra raça, uma vez que concede um bônus racial para a sua velocidade de movimento.
Movement Racial Traits
Sprinter: Catfolk gain a 10-foot racial bonus to their speed when using the charge, run, or withdraw actions.
A racial bonus comes from the culture a particular creature was brought up in or because of innate characteristics of that type of creature. If a creature’s race changes (for instance, if it dies and is reincarnated), it loses all racial bonuses it had in its previous form.