You need to consider several factors when choosing a badminton racket. Issues include string tension, racket weight, flexibility, balance and the size of the hand grip. Different rackets are also suited for certain playing styles. If you are a power player, you will prefer a stiffer racket.
The badminton racket that you choose should be of the standard specifications, so that is is acceptable in official matches and professional play.
Lighter weight – A racket, unstrung, which is weight between 85 grams to 90 grams is possibly a good control racket provided the balance point are not too high.
Heavier weight – A racket, unstrung, which is weight between 88 grams to 92 grams is possibly a good power racket provided the balance point are not too low.
Avoid fancy style – i have so many times seen beginners with really fancy looking hitting style but then they miss the shuttle completely. keep it simple.
Avoid strength training – leave this after you have learned your basic strokes.