for yr case ,hah???
since u break zero liao, u just need to everyday pull chin up
lor...
from 4 to 3 to 2 to 1 , then 1 to 2 to 3 to 4 to 5 to 6
.......
y like tat ???? coz, u need to season yr muscle first... so, yr
chin up decrease initially .... then, as u do more and more, yr
chin up will increase...
2.4 km is mentality... how u train yr 2.4 1 ???