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In thirty-degree heat and a scorching sun, Sparta’s football players ran out for the first training session of the summer training. “It’s actually the second one, we had physical tests on Tuesday,” explains assistant Luboš Loučka, who together with the coaching team gave the reigning champions of the Czech league a demanding hour and a half. The main point was the famous and often unpopular beep test, also known as the beeper or yo-yo test .