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Who is Borelli and How Can His Muscle Range Of Motion Length Law Help You in Your Fitness Routine?

Muscle range of motion is an important factor in training yourself properly. But it’s not just about moving your body. There are different range of motions for different effects. Read more to find out.

Meet Borelli: The First Biomechanic

Borelli lived in the 1600s and was a true Renaissance man — a mathematician, physicist, and physiologist all rolled into one. He’s often called the Father of Biomechanics because he was one of the first to look at the human body and say, “Hey, our muscles and bones work like levers, springs, and pulleys!”

What is Borelli’s Length Law?

In a nutshell, Borelli’s Length Law states: The length of a muscle is proportional to the range of its contraction. Muscles behave differently — and produce different types of strength — depending on whether they’re shortened, lengthened, or somewhere in between. In short, it’s the Muscle range of motion and what they can do for you.

Borelli’s 5 Ranges of Muscle Motion (And How They Help You)

Internal Range Full flexion (muscle fully shortened), very little extension.

Why it matters: Builds stability, tight control, and joint protection.

External Range

Total extension with a bit of flexion.
Why it matters: Strengthens muscles in their stretched, vulnerable positions.

Middle Range

Partial flexion and partial extension.
Why it matters: Where muscles are strongest and most efficient — builds power.

Total Range

Moving from full flexion to full extension.
Why it matters: Trains adaptability and real-world functionality.

Extrem Range

Muscle stretched to max while still contracting — e.g. ELDOA.
Why it matters: Improves deep structural resilience and tissue quality.

Final Thought: Your Fitness Journey is Bigger Than 3 Sets of 10

The world of fitness is vast and full of possibilities. Muscle range of motion is just one factor that you can work with. If you’re willing to look beyond sitting on a machine and doing 3 sets of 10–15 reps.
By training all muscle ranges of motion, you open up new levels of strength, movement, and vitality that most people never tap into.

Borelli’s old-school insights still hold true today: “The body is a masterpiece of mechanics. Train it fully — and you’ll live fully.

When you start combining Borelli’s Length Law with other timeless principles — like Pascal’s Law, Hill’s Muscle Model, the Delmas Index — through the holistic lens of Biotensegrity, your training, your movement, and your life will expand exponentially.

Methods like ELDOA are modern reflections of this timeless science — helping you build not just strength, but deep, intelligent resilience.

Read more about how holistic exercise and fitness program can help you feel your best and have a body that can keep up with the way you want to live.

Follow the Thread—Where Movement, Fascia, and Freedom Align

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How to Make The Time Go Faster During A Workout

This is an interesting article that I notice often in my studio during workouts.

https://www.theguardian.com/science/2025/mar/26/people-doing-intense-exercise-experience-time-warp-study-finds

In a workout class that includes ELDOA’s, a one-minute stretch can feel like an eternity due to the challenge and discomfort it presents for the joints. However, the entire 45-minute class or session can pass in the blink of an eye because of the constant need for awareness and consciousness during the exercises.

The Choice to have "fun" in a workout.

The choice during a workout

The article mentions that time seems to go faster when you are enjoying yourself, and I agree. However, when working out, the goal is to intentionally challenge yourself and embrace discomfort. It is up to each participant to choose whether to set themselves up for success.

They can choose to accept the challenge and even find joy in the process of improvement. The time will pass faster and more enjoyable. Or they can decide that “this is too hard,” “I don’t like it,” or “this isn’t fun,” basing their experience on fleeting emotional states and the belief that they can’t succeed. The time will pass slower and much less enjoyable.

Finding a balance of “fun” in your workouts

While having fun doing activities you love is essential, those activities can take a toll on your body. The areas you use most can become tight, weak, and challenging to work with. However, if you value your body and choose to give it “some love” through corrective exercises, you can continue enjoying your life. Ignoring these issues because they are “not fun” may eventually lead to injury and potentially require surgery. Super not fun.

In the long run, I find it enjoyable to challenge myself to become more than I am. It doesn’t mean the process is always fun, but it makes the outcome more worthwhile for both my body and soul.

Check out this next article on how a Holistic Exercise and Fitness Program can lead you to sustainable progress and a fun life

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Do You Know the Truth About The Bend Pattern?

Bending is one of the most common movements we use in everyday life—picking up your kids, moving a box, swinging a golf club. But most people don’t do it well. That poor movement adds up, leading to tightness, pain, or injury over time.

So should you jump straight into Romanian deadlifts (RDLs) or kettlebell swings to “fix” it?

Not quite.

Let’s unpack what the bend pattern really is, which muscle chains are involved, and how to approach this movement holistically so your body gets stronger—not more worn down.

Click the image to watch the full video

What Is the Bend Pattern, Really?

In training, the bend pattern refers to a hip-dominant movement like an RDL or deadlift. You’ll see this pattern show up solo or combined with other movements during everyday life—lifting, twisting, walking, squatting.

But just “doing” the movement doesn’t mean you’re doing it well.

If your muscle chains are out of balance—some tight, some weak, some misfiring—practicing the bend pattern without addressing the root causes can reinforce dysfunction and eventually lead to pain or breakdown.


The Bend Pattern Is a Global Movement

Unlike isolated exercises, the bend pattern is what we call a “global” movement. It requires the whole body to coordinate and act as one. That’s why I don’t just teach the movement—I assess how your body is functioning within the movement.

We look at the full chain: the muscles, fascia, tendons, ligaments, and how they interact.

The primary chain behind the bend pattern is your posterior chain—from your heel to your calves, hamstrings, glutes, deep back muscles, and even your neck and shoulders. But your anterior and lateral chains help stabilize that pattern too.

Here’s a quick snapshot of the key players:

  • Soleus
  • Gastrocnemius (calf muscles)
  • Hamstrings
  • Gluteus maximus
  • Four layers of spinal muscles
  • Trapezius
  • Rhomboids
  • Levator scapulae
  • Shoulder stabilizers

The Problem with Just “Doing” the Bend

Too often, people start loading up barbells without assessing the quality of their chain or how their fascia is functioning.

The bend pattern naturally places more mechanical load on the lower back than a squat—simply due to leverage. That’s not a bad thing. But it becomes a problem if:

  • You haven’t trained segmentally
  • Your fascia is out of balance
  • You’ve overloaded the system
  • You’re dealing with an acute back issue

Force isn’t the enemy. Misapplied force is.


How to Learn the Bend Pattern: Start Pure

To truly master this pattern, you must start with clean motor control. I teach the butt-back, bow-forward drill from a kneeling position. It’s the most stripped-down, brain-friendly way to teach your body how to move properly.

From there:

  1. Kneeling →
  2. Bodyweight standing RDL →
  3. Light weight →
  4. Full deadlift (hip + knee bend)

At each step, you’re grooving the right motor pattern—building a motor engram in your brain so you move properly without having to think about it.

Key pointers:

  • Keep a neutral spine (don’t over-arch or round)
  • Maintain all four natural curves in your back
  • Shift weight back into heels—but don’t lift your toes
  • Move as one unit—don’t break at the spine
  • Engage your abs and lats for support

Common Mistakes (That Will Wreck Your Back)

  • Rounding the spine
  • Overarching the lower back
  • Losing foot contact
  • Using too much weight too soon
  • Not progressing through proper training stages

Instagram might celebrate a rounded-back deadlift, but your body won’t. You want smooth, controlled, segmental movement—built over time with intention.


The Fascia Piece (Why It Matters)

Muscles don’t work in isolation. They’re wrapped in and connected by fascia—a living, communicative network that governs structure, neurology, and coordination.

If your fascia is dehydrated, compressed, or restricted, your body can’t move well—even if your muscles are “strong.”

Here’s what affects fascia health:

  • 🚰 Dehydration (aim for half your body weight in ounces of plain water daily)
  • 😰 Chronic stress
  • 🧍‍♂️ Not working the fascia directly (training in multiple planes and ranges)

Want a better bend pattern? Take care of your fascia first.


Deadlift vs. RDL

Once you master the RDL, you can layer in the deadlift by adding controlled knee flexion. The movement stays hip-dominant, but now you’re handling more force and range of motion.

Both movements are important—but only if you’ve earned the right to do them well.


Slow Is Smooth. Smooth Is Strong.

Building a bend pattern takes time. Don’t rush. Train your brain, train your chains, and train your fascia. It’s not about how much weight you lift. It’s about how well you move—now and for the rest of your life.


Want Help?

If you’re 40+ and looking to be strong, mobile, and pain-free for the long haul, I’ve got a few ways to support you:

All links are in the description below.

See you next week—take care.

— Ekemba Sooh
SolCore Fitness & Therapy

it’s not just working out, it’s building a foundation for a better life.

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