But a mere four months after giving birth to a health baby boy, Skyler, she's back in the gym and looking incredible.
While we object to the pressure put on new mums to 'lose the baby weight', we can't help but admire at the 35-year-old's toned physique.
And it's the perfect response those who criticised her for her pre-natal exercise routine and claimed she was risking a miscarriage, don't you think?
Scroll down for photographs of Lee-Ann weightlifting before pregnancy...
Her son weighed in at 3.2kg (7lb 3oz) and was described by his doting mother as "the perfect infant".
Lee-Ann, who opted for a natural birth and took no painkillers during an hour-long labour, added: "I can’t wait to take my baby out and show everybody that I didn’t injure him."
Official NHS guidelines recommend 30 minutes of moderate exercise a day for expectant mothers, and the Royal College of Obstetricians and Gynaecologists says recreational exercise can be beneficial during pregnancy.
The RCOG advocates exercise where there are no complications in the pregnancy and precautions are taken such as not exercising at a high intensity to raise the heart rate to its maximum and not running while it's too hot due to a risk of overheating.
It states: "In most cases, exercise is safe for both mother and foetus during pregnancy and women should therefore be encouraged to initiate or continue exercise to derive the health benefits associated with such activities."