adjective

in a good physical or mental condition; in good health.

I feel fit and healthy

in good physical condition,in good health,well,all right,fine,fit,physically fit,in good trim,in good shape,in fine fettle,in good kilter,in top form,aerobicized,in tip-top condition,flourishing,blooming,thriving,hardy,hale,hearty,robust,strong,vigorous,hale and hearty,fighting fit,fit as a fiddle,fit as a flea,bursting with health,the picture of health,in rude health,OK,in the pink,right as rain,up to snuff