One of the mysteries of the English language finally explained.
Synonyms of bend over backwards in English:
bend over backwards
See definition of bend over backwards
phrase
1‘they have bent over backwards to ensure a fair trial’
SYNONYMS
try one's hardest, try as hard as one can, do one's best, do one's utmost, do all one can, give one's all, make every effort
strive, struggle, apply oneself, exert oneself, work hard, endeavour, try
do one's damnedest, go all out, pull out all the stops, bust a gut, move heaven and earth, give it one's best shot
NZ Australian go for the doctor