In weight lifting you just have to have the weights of varies weights to be able to lift then slowly lift them above your head then slowly back down again.

your lift struts are weak

Its actually quite hard but easy you see all you have to do is bring your toes into a tip toe position and then lift your leg slowly always have a spotter

To power lift effectively in the gym, it is important to firstly warm up to prevent muscle injury. Then choose an appropriate weight and lift slowly to increase tension and muscle use.

Yes, serious injuries can occur if you do not lift a TV properly. Back injury is the most common injury. It is recommended that you have someone help you lift a tv, and move it slowly and carefully.