If you're going to act as Lara Croft, Tomb Raider, there's no question about it: you're going to have to unleash your greatest strength. Alicia Vikander was extremely disciplined and was not allowed to let her carb intake surpass 25 grams, her trainer, Magnus Lygdback, told POPSUGAR. This means she had to monitor and even limit the amount of vegetables she was consuming, especially the more starchy ones.
In addition to following the ketogenic diet, Alicia got her ripped body for the movie by doing things like lifting and strength training. The keto diet may just be the key to unlocking an eight-pack of abs.