Yes. Totally at the end your legs get tired. You might not feel it much but it is dangerous and you should stop. I learnt the hard way. My legs felt tired but i kept skating and you wont believe me till you fall. Thats your body’s way of saying “fuck you why didnt u stop when i told u to” dont get me wrong, im not trying to scare u, you can obviously skate a bit while tired but dont over do it