You will make exceptional gains, while enjoying an extraordinary experience, if you simply focus on progression. Your body and mind both thrive in environments of consistent stimulation, discovery and challenge. You benefit from the plastic effect when you are stretched beyond the limits of where you’ve been before.
There are many excuses for not working out regularly: no time, no energy, no money, or all of the above. The good news: exercise is free. And, research shows that short interval, higher intensity exercise gives you better results than long, drawn-out journeys on the treadmill or punishing runs on the pavement.