I heard someone once say running long and slow teaches your body one thing, how to run slow. If that’s all you’re after, you can stop reading; I don’t want you to be late for your water aerobics class. But in our profession you need to move quickly and with purpose, I’m not saying that long and slow cardio is totally worthless, I’m saying it has its place. In fact, I recommend performing a lower intensity, longer cardio workout at least once a week to flush the muscles. But, what I am talking about here is training your body and your heart to function under higher intensity. The cardio intervals not only prepare you for the fire ground but also blast away a lot of calories and body fat (as an added bonus).
The purpose of any firefighter’s cardiovascular program is to help them work more efficiently under the stresses encountered every day on the job, be it on the fire or rescue ground. Intervals raise our maximal oxygen uptake (VO2 max), which, simply put, is the greatest amount of oxygen our bodies can use during maximum aerobic effort. Firefighters who can work longer before they reach their VO2 max will be able to accomplish more on the fire ground. Intervals also help the body to more efficiently flush muscles of lactic acid. We develop a build-up of lactic acid and hydrogen ions that are associated with the burning sensation we feel in our muscles when under heavy physical stress. It has been shown that trained individuals will clear lactate faster than those who aren’t trained and will therefore feel less pain when undergoing physical exertion. The bottom line: We want to build a cardiovascular training program that enables us to work longer and harder with less physical pain when it really counts.
So what are intervals? In their simplest form, they’re short bursts of high intensity exercise separated by periods of lower intensity effort. Keep in mind; it’s not just high intensity training. Running a PR for a 5K is great, but not an interval workout. You need those lower intensity periods as well, not just sustained effort. Without the recuperation of the low periods you’ll never have the ability to make the tough parts as high intensity as they need to be. It’s those high intensity periods that bring the results.
Here’s an example of a interval workout that you can perform on a stepmill, StairMaster or any stairs:
5 minute warm-up at 60 steps/ minute or perform this active warm-up (click here).