iam doing project of abnormal activities detection for elderly people in matlab using hidden markov model.for that i need data sets of different abnormal activities like forward fall,back ward fall,head ache,chest pain ,etc

if true
  % code
end

[John D'Errico]

Totally unclear, and at best, just an advertisement for someone to give you data. No idea what data you want, since there is no hint. Finally, this is completely unrelated to MATLAB, on a MATLAB site.