This Is What Happens to Your Body Once You Turn 30

Weight gain

Shifting weight won't be as easy as it was in your 20s and you might notice a loss in muscle tone as your metabolism begins to slow.This is more noticeable in women than in men - and is often as a result of pregnancy when the body struggles to bounce back as easily.Stress at work can also cause weight gain as a reactionary release of hormones can encourage you to store weight around your middle, nutrition and weight loss expert Jane Michell told MailOnline.But it's not all bad - studies have shown you gain less weight in your 30s than in previous decades.