at the gym how do i know how much weight to use on a machine

[Trustmeimadoctor]

im new to this gym lark and i have had my induction that was frankly a bit of a let down. anyway as im using the machines i start to think i have no real idea how much weight i should be using. do i just keep piling it on til i can barely lift or press it or what.

any advice ?

[Trustmeimadoctor]

ah right cheers, will give that a go then.

[Trustmeimadoctor]

i must admit i did some sort of pull down exercise thing and i was ok at first but couple of days late something just went ping in my neck that wasnt very nice

i find it quite frustrating that i have quite strong legs (well according to leg press machine) but my upper body is more inline with mr muscles. my aim isnt muscles though just general overall fitness and loosing the moobs

[Trustmeimadoctor]

all bits really. what i was meaning i am after loosing weight and general fitness im quite aware that muscles will develop with the exercise naturally. im aiming to get down from 97kg to something that looks a little less love handle-ish bmi is apparently 28. my general fitness is really not great i cant run for any period of time maybe 2 minutes at the moment im not expecting leaps and bounds but some improvements would be good

[Trustmeimadoctor]

im down from 110 already so i have made some changes