During the season, we like to prepare our players using workouts that are a little more dynamic, ones that combine several movements together. When summer comes around, at first we want to isolate each movement that will be practiced, such as forward lunges, pulls, push presses, but we'll do it staying in one place. It's all done with controlled loads.
But in hockey like in other team sports, the environment is never controlled. It's always unpredictable. That's why both athletes and regular folk can lift weights in the gym, but that won't necessarily prevent you from hurting yourself taking your groceries out of the car. You may have done squats before, but if your posture wasn't good in some everyday movement you were making, the risks are always there.
Circuit training helps prepare the body to become dynamic, but most of the work is done with movement. The goal of a circuit training session like the one you will see below is volume, to tire the person out all while keeping good posture. Injuries often happen when the body is tired.
The workout I'm suggesting is a little bit like CrossFit. It's geared towards a clientele with a lot of experience, because there are a lot of repetitive movements. If someone has been working out regularly for some time and wants to start a workout like this one, the first thing is to know how to master certain elements, chief among them squats, bench presses and having good posture.
A circuit like the one done below by Michael McCarron lasts around 45 minutes. The goal is also to change up the workouts. Some of these elements can be swapped in or out so that you have a different workout every week.