Interval Training: The Best Way to See FAST RESULTS

There are a lot of misunderstandings about the best way to reshape your body. This is because there are a lot of trainers out there who espouse different fitness philosophies. In general, the various regimens touted all have some merit.

In this article, we’ll take a very simple look at various training strategies, bust a myth or two, and explain why interval training is the most efficient way to change your fitness level.

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What is Interval Training?

Get fast fitness results with Insanity!In short, you are interval training any time your workout includes a set where you perform at your maximum level, which is then followed by a lower-intensity set, which is then repeated to achieve a cumulative effect. An interval can be a set of curls, a dance move, or anything that tires you out over its given interval of time.

The intervals can be short and hard, or long and easy, but they’re all intervals, just so long as there is some cumulative effect (you get more tired as you go). All interval workouts aren’t the same, though; the duration and intensity of the intervals are what define the workout.

Conversely, aerobic training is when you maintain a steady output at a low intensity level over the course of the workout. This type of workout helps your aerobic efficiency but is a very slow way to change  your body.

The Myth of the Fat-Burning Zone

It’s impossible to approach this topic without debunking the term “fat-burning zone.” You might hear uninformed trainers recommend that their clients reduce the intensity of their workouts so that their bodies will burn more fat. In reality, all these trainers are doing is lowering the overall effectiveness of their clients’ programs.

An aerobic pace has you burning fat very slowly.

An aerobic pace has you burning fat very slowly.

Here’s a quick explanation of the fat-burning zone. At an aerobic pace (see above), your body utilizes stored body fat as fuel to save its preferred fuel (stored blood glycogen) for more pressing matters. It sounds great because you’re burning body fat. And while this is true, you’re burning it at a very slow rate.

During higher-intensity work, your body turns to a limited supply of muscle glycogen (often referred to as “blood sugar”) for energy. While your body’s burning glycogen during this more intense period, and not fat, it’s breaking down more body tissue. Breakdown is a bad word for a good thing, because your body produces more hormones and increases its metabolism to repair this breakdown. As the tissue repairs itself, it builds more muscle so that next time you do a stressful workout it won’t be so taxing. This process of adapting to intense exercise is where your body makes rapid change.

Continually building on this process is called progressive overload. By continually adapting to stress and then adding more (either with weight or speed or programs like INSANITY), you increase your body’s fitness so that it’s actually burning body fat for fuel as you rest. Interval workouts should be a key component in every phase of your training.

Techie Science Made Simple

Asked what separates serious and recreational athletes, author and fitness trainer Steve Ilg replied, “Intervals.” But since “intervals” is an umbrella term for training that targets many different energy systems, it requires further explanation. It’s also pretty accurate.

Push beyond your comfort zone to make extreme changes.Recreational athletes tend towards training within comfort zones. Interval training, regardless of the targeted intensity level, always forces you out of it. And you must be willing to leave your comfort zone if you want to see significant changes in your fitness level.

Interval levels can vary dramatically. For example, HIIT (high-intensity interval training) workouts are  short, sometimes only lasting seconds, and often completely anaerobic (thought the workout can be aerobic as the recovery time becomes part of the total load).

Distance runners and cyclists often use much longer intervals, spanning 1 to many minutes, which are obviously somewhat aerobic. The reason for the varying intensity of intervals is to train different systems in the body. These are defined by terms you may have heard of, like AT (anaerobic threshold) and VO2/max, and some you may not have, like phosphagen and glycolytic . For our purposes, you don’t need to know these terms. Here’s the 101 version.

  • LSD. Not the hippie drug from the 60s, but rather long slow distance. This is not an interval; it’s a term you’re likely to hear especially if you know or are a runner or cyclist. Its purpose is for base-level aerobic conditioning. As I said above, it’s not very applicable for making significant body changes, unless you do it for a very long time. Yet many trainers still recommend it. I think this is primarily because their clients won’t complain about doing 30 minutes of easy exercise, though it can have some application for very deconditioned clients and endurance athletes.
  • Sports-specific intervals. These target the systems mentioned above. Intervals training exists for all athletic endeavors. Since it’s targeted for sports performance, we won’t discuss it. You’ll learn plenty about it if you join a local group to train for an event though.
  • Weight training intervals. All weight training could be considered interval training, since you can’t do it forever. Old school weight training, however, often allowed rest for so long between sets that there was little cumulative effect. If you’ve spent much time at gyms, you’ve probably seen this in play; a set of bench press, a lot of yapping’. Repeat. All Beachbody weight training is done interval-style, which is referred to as circuit training in general. In circuit training, you move between exercises without much rest so that there is a cumulative cardiovascular effect. What defines these circuits is time, although you’ll usually use a  number of repetitions as a time estimate. Short efforts using heavy weight target power (or absolute strength). Medium timed effort of 12 seconds to a minute target muscular hypertrophy, or growth. Above one minute muscular endurance becomes to aim, and muscle growth starts to become limited.
  • Cardio intervals. These are what most of you probably define as interval training. First, we must define the difference between cardio and aerobic. Cardio means heart, while aerobic means oxygen. Aerobic training is most easily defined by the word “easy.” It’s really defined by training below your anaerobic threshold, which is the point where you feel “pumped”. Cardio, however, is all training that affects the heart. So it can include aerobic training but also all the high-intensity training associated with intervals, and circuit training. High-intensity cardio intervals are performed in something we called training zones, targeted the terms mentioned above (glycolytic, etc). Cardio intervals target these zones for various periods of time. To design your own interval workouts, you must do this yourself, so it helps to understand what each is and why you’d want to train it. When you have a trainer, he or she does it for you. This is why we at Beachbody always have test groups to make sure our workouts train you in your proper zone. That way, all you need to do is follow along without worrying if you’re training the correct system in your body.

MAX Intervals ‘N’ Stuff

Beachbody workouts use a number of different styles of intervals. As an example of why, let’s look at Insanity’s MAX intervals. In general, the longer the interval, the easier the workout. Some interval sessions have long and moderate intervals with short aerobic breaks. Others have short, difficult intervals with long aerobic breaks. What makes Insanity’s MAX Interval Training unique is that it combines long, hard intervals with short breaks.

INSANITY flips regular intervals on it's head. You will get MAX results with Insanity!

The MAX Interval system is based on HIIT, though it’s not HIIT as it was thought of traditionally. HIIT includes very short maximal intervals, followed by short breaks, which you’ll see in many of our programs, like Turbo Fire, Les Mills Combat, and others. It’s very intense and also effective. Its downside is that it’s so intense that your body can’t do it for very long. You can generally only see good progress for 2 to 3 weeks at a time using HIIT workouts until you need to transition to a different type of training.

Conversely, a more traditional approach to interval training that rely on various intensities of intervals (mainly moderate) can be done for very long periods of time before you need to change workouts. Your fitness improvements won’t be as drastic, but they’ll be steady. With MAX Intervals, we lowered the intensity of HIIT just enough to keep the high-intensity format but to also increase the time during which you can make rapid improvements before needing a break. The result is a high-intensity interval training system that keeps yielding results for a long time before you need a transition.

As these styles can work well, and are especially effective in combination. Shorter programs, like Insanity, might only use one style for as long as its effective before you need to take a break. Longer programs can combine them. For example, Turbo Fire’s 20-week program has 3 week blocks of HIIT training alternated with blocks of more traditional intervals styles.

In short, intervals are the most effective way to see quick results from a workout program. If you’re not doing them, add them right away… Check out what happened to Ann when she decided to add intervals into her life with Insanity!…

Ann Insanity review - Lost 67 pounds with 3 rounds of Insanity!

Ann completed 3 rounds of Insanity, lost 67 pounds and 37.5 inches! Check out her story in her own words:

I gained 70 lbs during my 3rd pregnancy, and I was put on bed rest at 27 weeks and had to refrain from any physical activity. After giving birth I felt weak, tired all the time, and didn’t feel good inside and out. I was not myself! I was struggling just to get up a flight of stairs. After I had my complete physical my cholesterol was out of control and my blood pressure increased significantly. Having family history of Coronary Obstructive Pulmonary Disease (COPD) and High Blood Pressure and my doctor recommended I take cholesterol medication to control it. As a nurse I refused (medical people are the worst patients)- I wanted to work on my health my own way, the natural way.

As a nurse I felt it’s my job to inspire my patients as well as others to live a healthy lifestyle. I felt like I couldn’t teach my patients healthy lifestyle if I couldn’t do it myself. I wanted to lead by example and be able to run around and play with my kids. I’m always up for a good challenge, but mostly I wanted to do it for myself. I wanted to be a good example for my kids and wanted to be around long enough to see them grow. I also wanted to feel great again, feel the energy and live actively. I must say that watching the Team Beachbody infomercials inspired me, the success stories and before and after photos are amazing and I said to myself, “If they can do it, I can do it.”

I saw an infomercial for INSANITY. I thought to myself,  “My goodness… that looks like a challenge. I wonder if I can do that?” The funny part is, I wanted to do it because I wanted to earn the T-shirt that says “I earned it.” To me, that was the trophy I could show around. And I knew I was going to be up for a challenge. So I purchased the INSANITY program with Shakeology

I like INSANITY  for the cardio, and it challenges me to push myself. I don’t get bored. It’s the combination of cardio and core exercise that I like, and it targets all muscle groups with no equipment required. When I first started even if I could finish just half the workout, you know I got my workout by how much I sweat and how intense I felt.

I no longer shop in Plus size anymore! I used to be a 1X and now I shop in the junior sections! I am proud that I am able to do the extreme workout and from zero push ups I can now do all sorts of push ups. I loved the program so much that I became INSANITY certified this year and am proud to teach the program and help people. I definitely feel more alive! I have a lot of energy and I look forward everyday to my different workout programs. Since completing the program and as an instructor I can use my own success story to help other people. It’s great to see more and more people coming in on a regular basis and knowing that people are willing to travel a little bit more just to take my class is very rewarding.

Taking the Beachbody Challenge was the best decision I’ve made for myself. Seeing the before and after results motivated me… I have Shakeology for dinner every night and I absolutely love it! I feel good and not hungry and I feel more energized. I am a chocolate person, so I look at difference ways to make the Chocolate Shakeology a dessert. Now, I am proud to say that my cholesterol levels are normal! From 254 HDL to 124 – that’s quite an accomplishment and without medication is a plus!

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