I've recently embarked on a journey to get back into tip top shape, and have started following a fitness routine known as burst fit training. Burst fit is a trending way of working out in the fitness world in which you train like a sprinter verses a marathon runner. Instead of training with moderate intensity over an extended amount of time, which is the conventional way of working out, you train in shorter secessions at higher intensity levels. In essence, you train like a sprinter would. For instance, instead of running on the treadmill for a 30min-45-min session at a moderate pace, cut your training time in half by placing many spikes of high intensity sprints between short periods of rest and moderate pace sessions. Run hard for 50 seconds. Take a 20 second break. Then repeat. With this process you can accomplish a lot more in less time. In addition, it makes your workouts more interesting.
I've been using this technique for the last few weeks and can already tell a difference in my energy levels, physique, and mental clarity. Of course nutrition is a vital part of results achieved, but none the less, the workout sessions must be effective, demanding, and done with diligence.
Give this a try and see if it's something you may want to incorporate into your work out sessions. Once you go burst fit, it's hard to go back to the long and marathon like training sessions.