While, it is true that it will take some force, simply planting your foot and leaning into it should provide enough resistance to "charge up your arm".
And, some lightweight chainmail would be near perfect, although, I think some BDU / ACU clothing would be better suited. A person, even a zombie, wouldn't be able to bite through the heavy cloth. It would hurt like a som'bitch, but it wouldn't be a bite. Chainmail, while breathable, would be fairly heavy and hard to come by. Plus, it doesn't have the 250 pockets my BDUs have.