improve

/ɪm'pruːv/　verb

★ to become better than before; to make something/somebody better than before

improve myself

I'm a kind of person who wants to improve myself, such as "marathon", "swimming" and also "English".

improve significantly/dramatically

Every day running helps me improve significantly.

My quality of life has improved dramatically since I started studying English.

improve quality of my life

It helps to improve the quality of my life.

significantly　ｼｸﾞニﾌｨｶﾝﾄﾘｰ  adv)かなり･著しく･はっきりと

dramatically   ﾄﾞﾗマﾃｨｶﾘｰ     adv)劇的に