Q: How long should I work out? —Kyle Strachila, Wash.
A: For strength training, it’s best to keep workouts around 45 to 70 minutes. This gives you enough time to perform a quality dynamic warm-up, a challenging routine and a cool down. If you skip one of these critical components, you risk robbing yourself of potential performance improvements and may even increase your risk of injury.
Workouts that extend beyond this guideline can result in overtraining, which sabotages performance gains. Your workout quality will suffer from overly-fatigued muscles. You will lose mental focus, and your body might even begin to break down healthy tissue for fuel.