type of inertia that tends to resist the change in case of an athlete often jumps before taking a long jump

Dear student, It is inertia of rest. We know that if an object is at rest it tries to be in the state of rest due to inertia of rest. So when an athlete tries to to jump for a long distance, he/she first take short jumps to overcome the inertia of rest and so that he can easily jump a long distance. Hope it helps you. Regards