3/22/24

The SAID Principle: What It Is and Why It Matters for Your Fitness Goals

Ever wonder why your body changes when you train consistently, and why it doesn't when you don’t? That’s the SAID principle at work. It stands for:

Specific Adaptation to Imposed Demands.

In simple terms: Your body adapts to what you repeatedly ask it to do.

Do squats regularly? You’ll build stronger legs. Spend more time on a bike? Your cardio system will get better at endurance. Sit around all day? Your body gets better atjust that - sitting.

This principle is the backbone of smart training, and it should guide how you set your goals and structure your workouts.

Why the SAID Principle Is Important

Your body isn’t guessing. It’s always reacting.

This means:

  • You get what you train for - nothing more, nothing less.

  • Random workouts = random results.

  • If you want to get stronger, your training has to challenge your muscles with heavier loads over time.

  • If you want better mobility, you’ve got to regularly move into and train through your end ranges.

This is why doing a bunch of bootcamp-style or random youtube workouts can be a dead end street.

How to Set Training Goals Using the SAID Principle

1. Get clear on the outcome you want.
Do you want to be stronger? Move better? Drop body fat? Run a 10K? Be specific.

2. Match your training to that outcome.
Strength requires progressive resistance. Mobility demands full range of motion and control. Fat loss needs a mix of strength and cardio, supported by nutrition.

3. Stay consistent long enough to adapt.
The body needs time. Don’t program-hop every week. Results come from repeating the right things over time.

4. Adjust as you go.
Your body will adapt, but eventually it’ll need a new challenge. Use progressive overload and keep improving.

The SAID Principle reminds us that training is just applied stress and adaptation. If your workouts don’t align with your goals, your results won’t either.

So the next time you’re tempted to chase trends or mix things up for no reason, remember this:

Train with purpose. Move with intention. Progress with a plan.

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Understanding RPE and RIR: Measuring Training Intensity Made Simple