Is it true that taking too much of weight on the leg-press machine can affect a woman's body.If so what could be an alternative to the same ?
By "affect" do you mean make you look like a male bodybuilder? if yes, then the answer is "surely no". There is a misconception about women and weight lifting, a lot of women think that if they do some weight training they will grow huge muscles like male bodybuilders.
While increasing weight will make you build a bit more muscles of course, but there is a big difference in the physiology of men vs women, of which : Men have more muscles, have more testosterone (which helps build muscles),etc..
My personal recommendation if you want to "tone" your body, all you need to do is "body-weight" training. It will make you build the necessary nice looking muscles, strength, endurance, and will give you a much better looking shape than machines and body building. body weight training might not be suitable for someone joining a body building competition, but it is the BEST for someone who want to tone their body and have good shape. (I assume that's what you are aiming at)
According my thinking as half of our body's mass consists of quadriceps, thighs, calves, and buttocks, so leg press will definitely affect your body. Not only it will make you fit but also stronger.
If you are thinking that after using the leg press machine and doing heavy weight lifting you will develop muscles like a bulky men body builder the answer is a big NO!.
If you don't want to go for a leg press, you should try Squats. But i would recommend you to go for a leg press machine. You can read more about leg press machine using this article where they have mentioned why working on leg press machine is essential for both men & women and have also outlined some of the best leg press machines including their pros and cons, features, specifications etc,.