How Your Heart, Lungs, and Muscles Adapt to Intense Cardio

Your heart, lungs, and muscles go through amazing changes when you push them with intense cardio. These adaptations make your body stronger, better at using oxygen, and more efficient during a cardio workout like running. Start with your heart. During…

What to Expect When You Begin High-Intensity Cardio Training

Starting high-intensity cardio training means diving into short bursts of all-out effort mixed with recovery periods, like sprinting hard then slowing to catch your breath. Expect sore muscles, heavy breathing, and quick improvements in your stamina if you stick with…