Question: what effct does your heart have after physical activity?

Justin Lawley answered on 13 Mar 2012:

Your hearts ability to pump oxygenated blood to your muscles is one of the biggest factors that effects how hard you can exercise. This is why elite endurance athletes like tour de France riders have bigger hearts that normal people. After years of hard exercise training, their hearts get bigger and bigger so it can deliver more oxygen when your muscles need it during very intense exercise.