Young now has no obvious sense, but as they grow older, gradually realize physical strength, memory is less, even weight-loss has been unable to succeed
Perhaps no obvious sense are still young, but with age, gradually be able to understand the physical, memory not as good as in the past, has been unable to successfully lose weight even succeed, etc.
Perhaps now young no obvious feeling, but with the age, and gradually will be able to experience the physical strength, memory is not as good as in the past, and even weight loss has been unable to succeed, and so on.