Our heart health is the core of our well-being, lack of exercise, proper food intake and other bad lifestyle habits often put a lot of strain on our hearts. While doctors do emphasize that exercising above all else, many people wonder which exercise is the best to improve their heart health. To answer this, top US surgeon Dr. Jeremy London, a board-certified cardiovascular surgeon posted a video on Instagram, underlining what exercise he thinks will help our heart the best. He says that aerobic exercise is the best kind of workout for your heart. This type of exercise makes your heart and blood system work better, which helps prevent heart problems. We can measure how well your heart works using something called VO2 max. What is Aerobic Exercise? Aerobic exercise is any physical activity that gets your big muscles moving in a steady, repeated way. You can choose how hard your body works during these exercises. Doctors use these exercises to also measure how well you are doing with a VO2 max The word "aerobic" means "with oxygen." When you do aerobic exercise, your breathing helps get oxygen to your muscles. This oxygen helps your body burn energy and keep moving. There are many different types of aerobic exercises. Some common ones include: Walking or jogging Walking is one of the easiest aerobic exercises to start with. You can walk at a pace that feels right for you. Jogging is faster than walking but slower than running. It puts more stress on your joints, so it's not a good idea if you have an injury. All you really need are good shoes. You can walk almost anywhere – outside, in a mall, or on a treadmill – which makes it easy to do all year round. Walking is a great way to begin an exercise routine. Cycling You can cycle on a stationary bike or a regular bicycle. You can make it harder by choosing a higher setting on a stationary bike or by riding on hills. Cycling is a good choice if you have joint problems like arthritis, because it's easy on your back, hips, knees, and ankles. If you cycle outdoors, though, bad weather might stop you.Using cardio machines Cardio equipment refers to machines that get your heart rate up with repeated movements. Some popular ones are rowing machines, stair climbers, ellipticals, and treadmills. You'll find these at gyms, or you can buy one for your home. Since there are many kinds, it's a good idea to try them out at a gym first. This way, you can see which machine you like best and which one feels good on your body if you have any old injuries or issues. Your doctor can also suggest the best cardio machine for you. Swimming Swimming is a gentle activity where you use your arms and legs to move through water. Swimming in open water (like a lake) is usually more intense than in a pool. If you have joint pain, water aerobics or water walking are good alternatives because the water helps support your body, taking stress off your joints. If you're swimming or doing water activities, always make sure there's a lifeguard nearby in case of an emergency. What is VO2 Max? Think of VO2 max as a score that tells you how fit you are. Harvard Health explains that a higher score means you're in better shape. It also means you're less likely to get heart disease and may live longer. When you breathe, your lungs take in oxygen. Your blood then carries this oxygen to your muscles. Your muscles need oxygen to create energy for you to move. The more oxygen you can use, the more energy your muscles have, and the better your workouts will be. Focus on Your Weakest Link Dr. London believes that the most important change you can make for your health is to figure out what you're not good at and work on that. He shared that even though he tries hard with his diet and exercise, his biggest challenge is sleep. “We all can do better in various places, but where can I really make meaningful shifts? Well, it's where I'm the weakest, not where necessarily I'm the strongest. And that is where the opportunity exists.”