Fig 2. Individual cf n-DNA responses to each of three repeated bouts of exhaustive treadmill exercise separated by three days of resting.

Eleven average-trained men executed three repeated treadmill exercise tests to exhaustion at speed corresponding to 70% of personal VO₂ max and cf n-DNA was determined in pre- and post-exercise blood samples. The first studied men is marked by 1 and the last one is marked by 11. The same numbers at line segments represent responses of the same volunteer.