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Fartlek - Literally, "speed play" in Swedish. It refers to interval workouts of mixed intensity, i.e. a mixture of fast and gradual operating. Fast-twitch - Type of muscle fiber which contracts rapidly and powerfully however fatigues rapidly. Fatigue - A feeling of weakness or exhaustion
Toto odstráni stránku "Glucose - Basic Form of Sugar". Buďte si prosím istí.