Whether or not you should work out twice a day depends on a number of factors, including your fitness level, goals, and schedule. In general, if you are new to working out, it is not recommended to start with two-a-day workouts as this can increase your risk of injury and burnout.

However, if you are an experienced athlete or fitness enthusiast, and your goal is to increase your training volume or improve your performance, working out twice a day may be beneficial. For example, you could do a strength training session in the morning and then a cardio session in the evening, or split your workout into two shorter sessions to fit around your work or other commitments.

It is important to listen to your body and not overdo it, as working out too much can lead to fatigue, injury, and diminished results. It is also important to make sure you are fueling your body properly with a balanced diet and adequate rest and recovery time between workouts. It may be helpful to consult with a fitness professional or coach to design a safe and effective workout plan that meets your specific needs and goals.