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A fitness fanatic has lost almost half her body weight and is now getting to work on her 1,500lb family.

Former junk food addict Christa Sierra, 23, managed to lose 190lb after she swapped burritos for salads and her sofa for the gym.

The Sierra family before the new regime

The Sierra family before the new regime

She is now hoping to compete in body building competitions and become a personal trainer – but not before she has turned her attention to her overweight family.

So far she has helped her 20-year-old brother Austin lose an incredible 120lb and her 17-year-old brother Jarred lose 80lb.

Her 46-year-old mother Georgia has lost 60lb and her 49-year-old father Jonny has lost 20lb.

Christa, who has dropped from 395lb to 205lb, says, ‘They’re all doing incredibly well but we still have so far to go as a family.

‘It’s incredible that in just over a year we’ve managed to lose nearly 500lb together.

‘We always ate huge portions of the wrong food… I knew I had to get healthy when I ended up in hospital because of my weight.

‘I have been diabetic since the age of 18 and contracted MRSA when I was in hospital,’ continues Christa. ‘Because I was so overweight my body couldn’t fight the infection and I nearly died.

‘I was on a ventilator for around four months and couldn’t walk afterwards.

‘I got on the elliptical machine for a few minutes each day building myself up. Now I work out for at least two hours a day and I’ve never felt better,’ she says.

‘My family aren’t as dedicated as me yet but I’m working on them and we’ll get there.’

Christa (second left) and her family are seeing results

Christa (second left) and her family are seeing results

Christa would eat three tacos, a bowl of cereal and some sausage and gravy for breakfast followed by junk food for lunch and three burritos for dinner.

When snacking she’d regularly gorge on crisps and pints of ice cream all washed down with three litres of cola a day.

‘I used to drink a lot – sometimes I would have nine or ten pints of whiskey and Coke a night,’ adds Christa, from San Marcos, Texas.

‘I didn’t realise it at the time but I was deeply depressed, I’d been bullied all of my life because of my size so used to comfort eat and drink – I’m so glad that’s over.

‘I’ve never been happier or healthier than I am now and that will soon be the same for my family.’

She has dropped her daily calorie intake from 5,000 calories to 1,800 a day.

Christa works out as well as eating healthily

Christa works out as well as eating healthily

For breakfast she now eats egg whites followed by a fruit snack or nuts and berries. At lunch it’s a yogurt and some lean ground turkey with vegetables and rice, and at dinner she will have a piece of lean meat with some vegetables.

‘Some of my family still eat pretty bad, especially my dad – he is stubborn,’ adds Christa.

‘But this isn’t about looking and feeling better; this is about survival – my weight nearly killed me and I genuinely believe that I would be dead by now if I didn’t do something about it.

‘I don’t want that to happen to my family which is why I’m doing everything I can to ensure they get in shape.’