Now, Kristina wants to warn others about the dangers of "ego lifting" to prevent others going through the same ordeal. Kristina, from Malibu, California, US, said: "I wanted to look cool in front ...

Just four more and you've completed a set. Once mastered, this is a great compound movement that allows you to lift a lot of weight and load up your hamstrings. Begin by holding a barbell at waist ...