[1] Friedrich Schiller Univ Jena, Inst Sport Sci, Dept Human Movement Sci & Exercise Physiol, Seidelstr 20, D-07749 Jena, Germany
[2] Friedrich Schiller Univ Jena, Inst Sport Sci, Methods & Stat Sports, Seidelstr 20, D-07749 Jena, Germany
[3] MSH Med Sch Hamburg, Inst Interdisciplinary Exercise Sci & Sports Med, Kaiserkai 1, D-20457 Hamburg, Germany
[4] Harvard Med Sch, Spaulding Natl Running Ctr, Dept Phys Med & Rehabil, 1575 Cambridge St, Cambridge, MA 02138 USA