XT Test Plus You need to always stretch your muscles before beginning any weight lifting exercises. This can prevent many injuries via warming up the muscles prior to lifting heavy loads. Stretching protects you from injuries that might otherwise interfere with your ability to exercise regularly.XT Test Plus Don't set goals that are impossible to reach. Make sure your muscle building goals are reachable. You will get the best results by doing this slowly, over time. If you use substances like steroids or other drugs, you may be facing severe health issues in the future.