Start der NUMRI-Studie in Phase II After only 4 months since the start of the Nurmi-Study, over 2,120 participants are at the start of the Nurmi main study with STEP 2. All phases (STEP 1 to STEP 3) run until 31 December 2015 and can be “refrained” up to and including December 31, 2015!Therefore, we cordially invite all runners from half marathon distance (every level of performance) to participate in the most important study for the running movement to accomplish something big together. All information about the Nurmi Main Study with STEP 2 and STEP 3 can be found on the Nurmi website under https://www.nurmstudy.com/abraufzeit