Raising the bar - weight lifting is a common type of strength training. As soon as you lift one weight you will look like a bodybuilder...Just kidding.
They don’t instantly make you ‘massive’ it takes a lot of hard work, dedication and deprivation to look as lean as a body builder. So don’t be scared of these heavy little pieces of equipment as they have major health benefits, for instance if your muscle mass increases so will your basal metabolic rate which promotes long term fat loss. Partaking in an intense weight training workout will also increases your metabolism for several hours after - this doesn’t mean you can stuff your face with whatever you like though.
Stronger muscles improves posture, creates better support for joints and can even reduce the risk of injuries from everyday activities - like lifting a very heavy one year old.