Zombies, however, have no such defensive capabilities, and the front loaded nature of the machete blade inflicts maximum (one handed) damage. One does not have to be a strongman to sever the spinal column with one blow from a machete. Hacking off limbs or heads at will, however, is merely the stuff of hollywood dramatics. Only a physically-gifted wielder could possibly pierce a skull and brain with a swing of a machete, and only a strongman can do so with impunity. The neck is the most vulnerable target with a machete.
As common/old machetes are not always composed of high quality steel (nor is any product available at the $20-$100 price range), regular sharpening is recommend if this is one's designated primary zombie weapon, as is lengthening or reinforcement of the hilt, for superior grip and ease of wield. For best results, Max Brooks recommends finding those sold in military surplus stores since their machetes tend to have higher quality steel with darkened blades for better night-time concealment.