People only need to walk up to 12 miles per week or for...

People only need to walk up to 12 miles per week or for about 125 to 200 minutes per week to improve their heart health. Our data suggest that if you walk briskly for 12 miles per week you will significantly increase your cardiovascular fitness levels compared to baseline. If you increase either your mileage or intensity, by going up an incline or jogging, you will achieve even greater gains.