Efficiency beats effort in freestyle
A flatter body line and a clean entry reduce drag more than extra arm strength ever will, which is why small technical corrections often produce a bigger speed gain than simply swimming harder. This is general guidance; if you're new to swimming, a few sessions with a qualified instructor will correct habits far faster than practicing alone.
Recovery matters outside the pool too
Swimming works the shoulders and upper back hard, so using a foam roller on those muscles after a session can help ease tightness and support your technique work over time.
Frequently Asked Questions
Is the kick supposed to be the main source of speed?
Not really. The flutter kick mainly keeps your legs and hips from sinking rather than driving you forward. Most of your propulsion comes from the arm pull.
When exactly should I breathe?
Turn your head to breathe just as the arm on that side finishes its pull, then return your face to the water and exhale slowly and steadily through your nose and mouth before your next breath.