As a matter of fact, it will hinder progress. Mindfulness cannot be cultivated by struggle. It grows by realizing, by letting go, by just settling down in the moment and letting yourself get comfortable with whatever you are experiencing. This does not mean that mindfulness happens all by itself. Far from it.
Energy is required.
Effort is required. But this effort is different from force. Mindfulness is cultivated by a gentle effort, by effortless effort. The meditator cultivates mindfulness by constantly reminding himself in a gentle way to maintain his awareness of whatever is happening right now. Persistence and a light touch are the secrets.