I could never achieve this. Even after months of consistent training, my heart rate tends to shoot up pretty fast and max out even for small effort runs. Cardiologist tests haven't turned up anything and they insist I can continue to do what I'm doing (some even saying I shouldn't be afraid to go beyond max HR, but I don't know about that). If anyone else experiences the same or has some insight into this, do share.
EDIT: what my training looks like: zone 2 training with a chest strap monitor. 30-45 min sessions, barely breaking out of walking speed, 2-3 days a week for months altogether, mixing it up with interval runs some times. I've done this many times over in my life, never seeing any improvement. Even today, the smallest of jogs will take me to max HR within 10-15 min
EDIT: what my training looks like: zone 2 training with a chest strap monitor. 30-45 min sessions, barely breaking out of walking speed, 2-3 days a week for months altogether, mixing it up with interval runs some times. I've done this many times over in my life, never seeing any improvement. Even today, the smallest of jogs will take me to max HR within 10-15 min