![German international Michael Ballack (R) works hard under the eyes of fitness coach Steve Freitag during the sprint training in Geneva, Switzerland, Tuesday 23 May 2006. The German national team prepares for German international Michael Ballack (R) works hard under the eyes of fitness coach Steve Freitag during the sprint training in Geneva, Switzerland, Tuesday 23 May 2006. The German national team prepares for](https://c8.alamy.com/comp/D3NJJ5/german-international-michael-ballack-r-works-hard-under-the-eyes-of-D3NJJ5.jpg)
German international Michael Ballack (R) works hard under the eyes of fitness coach Steve Freitag during the sprint training in Geneva, Switzerland, Tuesday 23 May 2006. The German national team prepares for
![Hallen-Europameisterschaften - Angelica Moser und Ajla Del Ponte schreiben ein weiteres Kapitel im Schweizer Leichtathletik-Märchen Hallen-Europameisterschaften - Angelica Moser und Ajla Del Ponte schreiben ein weiteres Kapitel im Schweizer Leichtathletik-Märchen](https://img.chmedia.ch/2021/3/7/985c9fa7-6219-4b87-80e4-267c1caf0d11.jpeg?width=560&fit=crop&quality=75&auto=webp)
Hallen-Europameisterschaften - Angelica Moser und Ajla Del Ponte schreiben ein weiteres Kapitel im Schweizer Leichtathletik-Märchen
![PDF) The Effects of Repeated-Sprint Training on Field-Based Fitness Measures: A Meta-Analysis of Controlled and Non-Controlled Trials PDF) The Effects of Repeated-Sprint Training on Field-Based Fitness Measures: A Meta-Analysis of Controlled and Non-Controlled Trials](https://i1.rgstatic.net/publication/273780316_The_Effects_of_Repeated-Sprint_Training_on_Field-Based_Fitness_Measures_A_Meta-Analysis_of_Controlled_and_Non-Controlled_Trials/links/5b8ed6f0299bf114b7f5bf4e/largepreview.png)