"I like to keep fit, but I never lift very heavy weights"

Ralph Fiennes is stressing the value of staying fit and healthy, but likewise being mindful of the amount of weight you raise. He is recommending that it is necessary to work out regularly, however to be knowledgeable about the quantity of weight you are lifting. He is suggesting that it is better to lift lighter weights and do more repetitions, instead of lifting much heavier weights and risking injury. This is a sensible approach to workout, as it permits you to stay healthy and fit without putting too much pressure on your body. By exercising regularly and bearing in mind the amount of weight you lift, you can stay healthy and fit without running the risk of injury.