British film star Tom Hardy had to get into the shape of his life for mixed martial arts film Warrior. Follow his muscle maxims and you too can pack on lean muscle worthy of the Octagon.

Hardy’s trainer, Pnut, has a simple but unorthodox method for bulking fast. “I call my philosophy ‘signalling’,” he says. “Throughout the day you need to send constant signals to your body, so that it adapts in the direction you point it in. It’s better to do 10 press-ups every hour than 100 in a single burst. If you do things often enough, your body adapts for the task you set it, and you evolve.”

(Related: How to eliminate press-up shoulder pain)

How to perform these exercises 

Pnut recommends performing these exercises four times a day – when you wake up, at lunchtime, when you get home from work and before bed. It should only take about 20 minutes, but don’t rush. Use light weights and move slowly through the exercises, concentrating on perfect form. Start by doing it in the morning and evening, and then gradually add the other sessions in. If you want to pile on muscle as soon as possible, you’re going to have to get used to working out little but often. “Remember,” says Pnut, “there are no shortcuts.”

(Related: The 10-minute six-pack workout)