I want to take a close look at just one exercise to make a point. When people perform a bicep curl, they often arch their back to get the weights up or use momentum to get the weights started in the right direction. In my professional opinion, this is not the best way to curl weights. Next time you grab dumb bells, start by standing with great posture, shoulders square and pulled back with your abs engaged. Now start with your arms hanging at your sides, elbows pinned to your ribs. This is the stance you will hold for the entire curl! Do the maneuver only moving your forearms as you curl the weights upward and slowly return them down to a complete stop. This will, I guarantee, be harder! Plus, it will be focusing your exercise on your biceps, the real reason you’re doing curls in the first place.