Exercise Principles

Putting the FITT Principle to Work

How to apply the FITT variables — adapt through overload, adjust when progress stalls, and break plateaus with intensity, variation, rest, and nutrition.

Putting the FITT Principle to Work

When you exercise at sufficient frequency, intensity, and time — and pick a type of exercise that keeps you motivated — your fitness will improve. The physiological improvements that come from sticking with a program are known as the training effect.

The Training Effect

Stick with a well-structured kettlebell program and you'll start to see changes across the board:

Appearance

Body composition shifts as fat decreases and lean mass increases.

Body Weight & Bodyfat %

Measurable improvements in body weight and bodyfat percentage.

Cardiorespiratory Endurance

Heart and lungs adapt to handle higher workloads.

Strength & Stamina

Muscular strength and stamina build with progressive load.

Mobility

Range of motion improves as joints move under load.

Volume Comparison

Different combinations of load, tempo, reps, and duration can produce the same total volume — there are many roads to the same workload.

Principles of Adaptation

Your muscles adapt to your current fitness level through four principles. If you appropriately stress your system through a progressive kettlebell program, your body will adapt and improve its function.

Overload

Stress the body beyond its current capacity to trigger adaptation.

Specificity

Adaptations are specific to the type of stress applied.

Reversibility

Gains are lost if training stops — use it or lose it.

Individual Differences

Each person responds differently based on genetics, age, and history.

Finding the right dose of stress matters.

If the stress is not intense or frequent enough, no adaptation occurs.
If the stress is too intense or excessive, injury or overtraining results.
The best improvements occur when optimal stresses are introduced into your program.

Adjusting the FITT Variables

As positive adaptation occurs, it will be time to change one or more of the FITT variables so you can keep progressing into your next training phase.

For example, if you've been training with kettlebells 3 days a week for 30 minutes and your progress has stalled, modify your program by adjusting one or more of these variables:

Frequency

Add one more day of kettlebell training.

Intensity

Use a kettlebell that is 2 to 4 kilograms (5-10 lb) heavier.

Time

Increase your workout time by 10 to 15 minutes.

Type

Shift from low-intensity aerobic training to more anaerobic work — multiple high-intensity sets with shorter rest periods.

Training Plateaus

An overriding objective for the progress-minded exerciser is to avoid training plateaus — and successfully navigate them when they occur.

What is a plateau?A plateau occurs when your body has returned to homeostasis — the physiological process the body uses to maintain a stable internal environment.Beginners may go as long as 6 months of training before a plateau occurs, with dramatic strength gains often happening in the first few months. Soon, however, these gains begin to level off — and you need to adjust your training to continue progressing.

Techniques to Break Out of a Plateau

Increase Intensity

Make your muscles work harder. Switch from low weight, high reps to high weight, low reps — for example, change from 3 sets of 20 reps to 3 sets of 5 reps with a heavier load.

Vary the Exercises

If you've been doing mostly vertical lifts (snatch, press), switch to more horizontal lifts (renegade rows, bottoms-up push-ups). Changing motor patterns stresses muscles in a new way and lets overworked areas recover.

Change the Order

Modify the order in which you perform the lifts. When your body fatigues in an unexpected order, your muscles adapt differently.

Add or Subtract Exercises

Over time, remove some exercises and add others. Aim to do more with fewer movements by selecting compound exercises — e.g., the clean and press combines a vertical pull and a vertical press into a single exercise.

Get Adequate Rest

Rest and recovery via adequate sleep are critical for performance. Plateaus are sure to occur if you're chronically tired, and injuries become more likely. Take a 1 or 2-week break at certain phases throughout the year.

Analyze Your Nutrition

Are you getting enough protein and the right carbs and fats? Are you digesting well, eating quality foods, and hydrating adequately? Do you need supplementation? Assess nutrition as it relates to health and performance — it's an ongoing, individual process.

A Word on Muscle Confusion

Muscle confusion says that to avoid or break out of plateaus, you must constantly vary exercises, sets, reps, and weight.The tactics above work well when you're in a plateau — but they're not a good general training strategy. Too much variation distracts from the larger goal of building a solid foundation, which is built from progressive overload of the basics.

Volume Is What Drives Fitness

Ultimately, increased volume of exercise (total tonnage) is what results in increased fitness.

Track your progress. Always record your load, reps, and sets to determine total volume. When volume maxes out or decreases, you've hit a plateau — apply one of the muscle-confusion techniques to push through. It can also break the monotony of a strict program and bring some new motivation.Of all the factors discussed, rest and nutrition should be prioritized. Adjusting one or more FITT variables every 4 to 6 weeks will let you continue making progress over the long term.

Understanding the FITT principle and how to control its four variables — frequency, intensity, type, and time — lets you structure ongoing progress within an exercise program. The next step is to match this knowledge with a realistic assessment of your current fitness level and set goals to create a practical, motivational kettlebell training practice.

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FITT Principle

The four variables — frequency, intensity, time, and type — you can manipulate to structure a kettlebell training program and keep your body continually challenged.

Setting Goals, Assessing Fitness, and Training Safely

How to set meaningful goals, assess your current fitness level, and build a safe foundation before beginning your kettlebell training program.