3 ms·
It depends on your goals. If you just want to do the 5K as fast as possible, you'll be close to your max heart rate (180). If you're just "leisure" running (aka
by hvidgaard 7y ago
It depends on your goals. If you just want to do the 5K as fast as possible, you'll be close to your max heart rate (180). If you're just "leisure" running (aka. you can talk while running) I suppose 140 is reasonable.