The best workout sessions are short and intense. But in the case of a 300 workout session this can differ and your workout sessions can extend up to two hours. It is very difficult to complete all the required exercises within short periods and this makes for longer workouts essential. The 300 workout plan involves plenty of pushups, pull ups and various other exercises that take time. Dumb bells and weight are given additional importance in this type of workout. For the first few weeks, the sessions will be relatively relaxed. But the intensity will increase as time goes on.