Are you taking your pre-exercise warm-ups too lightly? If you don't begin to sweat, the answer could be yes.

A warm-up is a low-intensity cardiovascular exercise performed for 5 to 10 minutes until perspiration begins. Brisk walking, jogging, cycling are just a few examples of warm-ups.

It's important to note that strength-training workouts - and not just cardiovascular exercise - should be preceded by a warm-up. If you exercise working muscles that are not adequately warmed up, you could increase your risk of injury.