When to get checked
Being winded usually passes, but getting your breath back does not mean nothing is damaged. If someone collapses after a body or chest shot and does not respond and is not breathing normally, treat it as cardiac arrest: call your local emergency number (999 UK, 112 EU, 911 US), start CPR and get a defibrillator. Occasional gasps are not normal breathing. Get emergency help too for belly pain that keeps going or gets worse, a belly that hurts to touch or feels hard, or vomiting blood, even hours later, and do not drive yourself.[1,7,8,9,10,11,12]
This page is general information, not medical advice. If you think you are hurt, see a doctor. Where your gym or governing body has stricter rules, follow them.