3 ms·
2 hours of running at 4:45/km keeps your heart rate nice and high. When I ran a marathon in 3:24:xx my average heart rate was 170bpm.
by Swizec 6y ago
2 hours of running at 4:45/km keeps your heart rate nice and high.
When I ran a marathon in 3:24:xx my average heart rate was 170bpm.