New evidence suggests human beings are getting weaker, today's generations simply don't have the same muscle power as their parents and women are affected more than men in this area.
In Western countries such as the UK, U.S. and Canada, muscular strength has hit a plateau and muscular endurance - the ability to repeatedly exert force, such as doing sit-ups - has declined by 8 to 10 per cent since the Eighties, according to Dr Grant Tomkinson, senior lecturer in health sciences at the University of South Australia, a leading researcher on trends in fitness over time.
And it's women who are affected most, the Daily Mail reported.
London-based physiotherapist Sammy Margo says he sees a massive epidemic of weak women who have no muscle strength.
There are skinny women who have no muscles supporting their spine, and overweight ladies who don't have any muscles under the fat, he noted.
This is because the majority of young females want to look thin and not strong, says Ken Fox, professor of exercise and health sciences at the University of Bristol.
They don't eat much, they don't exercise much, and because of that they have weak musculatures - it's really not a healthy way to be, he said.
Sedentary lifestyle and lack of protein intake among women are also blamed for weakening muscles.