"Better cardio vascular health"
What do you mean by this ?
I'm assuming you mean better resting heart rate right ? A stronger Heart through exercise the way you have a stronger arm from lifting weights , right ?
Except that's not how the heart works. The heart responds to running as a stressor, it is always trying to reach homestasis along with other body systems. Running and heart intensive exercises stimulate the flight or fight response. This is why you feel good after a work out, your body thinks you just survived a bear attack or something life threatening.
Frequent weekly/daily stressors like this reduce heart strength over time. Look up cardiac arrest rates in runners, baskeball, footbal, weightlifting.