<human>:  What is a good boxing workout to build strength?
<bot>: A good boxing workout to build strength includes a combination of shadow boxing, skipping rope, punch bag work, interspersed with strength training exercises such as squats, push-ups and pull-ups. Each session should involve warming up, setting goals and interval training to allow for the best use of time and help the boxer to stay focused. Additionally, periodic rest periods should be included between each exercise.