Heart Rate data in relation to marathon PR?

  • Slipchoge
  • Slipchoge
  • HRM let's figure it out
  • RunningOtaku
    registered
  • LateRunnerPhil
    registered
  • LateRunnerPhil
    registered
  • RunningOtaku
    registered
  • LateRunnerPhil
    registered
  • PunctualRunnerBill
    registered
  • Slipchoge
  • Slipchoge