The problem is that the top half of such curls is where you can get the most benefit. The solution is to do your barbell bicep curls while seated.SLX Muscle Before beginning any exercise routine, stretch for around 10 minutes. This helps warm up your muscles prior to lifting any heavy weights. Additionally, avoiding injury by regularly stretching means less exercise time missed.SLX Muscle Always do 10 minutes of stretching prior to lifting weights. When you warm up your muscles, you are reducing your chances of injuring yourself when later lifting heavy loads.