today: 11 k, 1:05h (3rd bridge)
yesterday: 8k, 0:52h (2nd bridge)
At both runs I improved my frequency. Normally I am running with about 88 beats per minute. I read, that professionals go with 92 - 95 beats p m. The frequency depends largely on the arm movement. So I adjusted my frequency over small distances to a higher level by pushing the arms faster back and forth in a gentle way. The arms should actually never cross the body midst and should move really back and forth not up and down. Combining this with the optimal running position (flexed stumach muscles, upright head position, relaxed shoulders, leaning forward) it makes you really focus on the individual elements to get it right. There is still a long way to run!