Strona zostanie usunięta „Glucose - Basic Form of Sugar”. Bądź ostrożny.
Fartlek - Literally, "speed play" in Swedish. It refers to interval workouts of combined intensity, i.e. a mix of quick and slow running. Fast-twitch - Type of muscle fiber which contracts quickly and powerfully however fatigues shortly. Fatigue - A feeling of weakness or exhaustion
Strona zostanie usunięta „Glucose - Basic Form of Sugar”. Bądź ostrożny.