Come on, don’t be a weakling: Load weight plates onto a barbell on a squat rack at chest level. And making sure to follow proper technique to avoid injury, do several sets of squats – uff – a standard strength-training exercise. Strength training is diverse and can be quite complex, and many myths surround it. We spoke with two fitness experts, who dispel five common ones. 1. You should train as often as possible, and with heavy weights “It’s not that simple,” says physiotherapist and fitness coach Johannes Frank, who owns a fitness facility in Berlin. Proper strength training is a matter of t…