Cardio and strength both matter

A lot of people treat exercise like a fork in the road: either you do jogging for your heart or lifting for your muscles. A cardiologist told Today.com on April 9 that the better answer is both, because aerobic exercise and strength training help the cardiovascular system in different ways. (today.com) Aerobic exercise is the kind that keeps you moving long enough to raise your breathing and heart rate, like brisk walking, cycling, or swimming. It trains your heart the way steady miles train an engine: to pump blood more efficiently over time. (cdc.gov) Strength training is exercise that makes your muscles push against resistance, like dumbbells, machines, resistance bands, or body-weight moves such as squats. It is not just a “muscle” workout, because the American Heart Association says resistance training can also improve blood pressure, cholesterol, and insulin sensitivity. (heart.org) (acc.org) That split is why “cardio versus weights” is the wrong question. One type is especially good at building cardiorespiratory fitness, and the other helps preserve muscle mass and strength that people steadily lose with age. (today.com) (acsm.org) The federal baseline for adults is not mysterious: 150 minutes a week of moderate aerobic activity, or 75 minutes of vigorous aerobic activity, plus muscle-strengthening work on at least 2 days a week. The Centers for Disease Control and Prevention says you can spread those minutes across the week instead of cramming them into a weekend. (cdc.gov) The American Heart Association gives the same basic target and adds one useful detail: aerobic activity should preferably be spread throughout the week. That means a heart-smart plan looks less like one heroic Saturday workout and more like repeated smaller sessions. (heart.org) A simple week could be 30 minutes of brisk walking on 5 days, with 2 of those days also including 20 to 30 minutes of lifting, bands, or body-weight exercises. The key is that the strength sessions hit major muscle groups, not that they look like bodybuilding. (cdc.gov) (prescriptiontogetactive.com) This advice lands in a country where most adults are still missing part of the formula. The Physical Activity Guidelines for Americans say nearly 80 percent of adults do not meet the key guidelines for both aerobic and muscle-strengthening activity. (odphp.health.gov) So if your schedule only has room for “heart day” or “weights day,” the current medical advice is to stop thinking in either-or terms. The routine most aligned with heart-health guidance is the one that mixes regular breathing-hard movement with at least two days of resistance work. (today.com) (heart.org)