Chassis Integrity


• 30x Chassis Integrity training circuits which implement the most recent thinking of MTI’s Chassis Integrity programming theory
• Circuits train rotation, anti rotation, total and extension (low back) midsection strength and strength endurance from a standing or kneeling position
• Circuits extend 10-20 minutes, and can be completed as stand alone training sessions or add on components to any training session.
• This training plan is one of the 182+ Plans included with an Athlete’s Subscription.

Product Description

Chassis Integrity Overview

Our Chassis Integrity programming theory evolved the Summer 2015 after a personal experience. I had moved away from the tactical programming to some distance running and bodyweight work. The bodyweight training included plenty of core work – sit-up variations, bridging, lower back complexes, EO’s, and some ground and equipment based work such as Russian Triangles, Ankles to Bar, GHD Sit ups, etc.

Further, my core circuits pushed beyond what I commonly programmed for athletes in both rounds and duration. I really hammered it – or so I thought.

After a couple months I got back underneath the barbell for some front squats and struggled to go heavy. My legs were strong, in isolation, and my core was strong, in isolation, but the link and coordination between the two wasn’t there – I lacked “chassis integrity.”

This had a real impact on me – as I’d hammered my mid section, but all that work hadn’t translated into a the functional task of lifting heavy while standing. It caused me to question my core programming theory to that point and I began to develop the Chassis Integrity model.

Before Chassis Integrity
My prior core training theory had alternated between two circuits – FIRE, and LBC.

“FIRE” is an acronym for “Flexion / Isometric / Rotational / Extension”. A FIRE Circuit has one exercise from each, for example:

4 Rounds

  • 10x Weighted Sit up @ 25# (Flexion)
  • 30/30 Side Bridge (Isometric)
  • 10x EO’s (Rotation)
  • 10x GHD Back Extension (Extension)

“LBC” is an acronym for “Low Back Complex” and we learned this approached from the book “Foundation Training,” by Eric Goodman and Peter Park. The authors note that few miss a day of work because of ab pain, and correspondingly wondered why so much core training focused on the front of the body, and not the low back. They aimed to change this, and our typical Low Back Complex circuit comes from their exercise menu. Below is an example. I’ve since expanded the scope of our Low Back Complex to mean a circuit of four extension exercises.

4 Rounds

  • 20/20 Standing Founder
  • 20/20 Low Back Lunge
  • 20/20 Kneeling Founder
  • 10x Face Down Back Extensions

Chassis Integrity Theory
My experience last summer caused me to question three things about this core training approach.

  1. Why were we doing so many ground or equipment based core exercises when in reality most core work is done standing? I reasoned that not performing core exercises from a standing or kneeling position had compromised my chassis integrity.
  2. I questioned the need for isometric and flexion core exercises in general. Real life core for the athletes we serve (mountain/tactical) is seems dominated by extension and rotational movement patterns. Real life also includes isometric work, but not in the way we had been training it. More specifically, rather than isometric work, what really occurs is anti-rotation. Mountain and Tactical athletes must fight force trying to torque them rotationally.
  3. Previously I had programmed core circuits using the standard round and reps format used as examples above. This approach seems to train strength, but not necessarily strength endurance. Perhaps grinds for time would be more transferable outside the gym, I reasoned.

What evolved is a new approach to core training – Chassis Integrity.

First, I moved away from most ground-based core exercises to prescribing exercises performed either standing or kneeling. To achieve Chassis Integrity I needed to train the system holistically.

Second, I began to replace the FIRE circuits in favor of Chassis Integrity circuits and move from rounds and reps, to time. This Plan deploys 5 types of Chassis Integrity Circuits – most with 3x exercises. Each circuit deploy a combination of these movements:

  • Anti Rotation
  • Rotation
  • Total
  • Extension (low back)

The first 10 circuits in the plan are 10-15 minute long grinds, and use relatively light loading. Beginning with Cirtuit 11, the duration jumps to 15-20 minuts, and loading increases.

Common Questions:

How Should I Use These Circuits in My Training?
These Chassis Integrity circuits are 10-20 minutes long and are designed to either supplement existing training by serving as focused mid-section “finishers” to other training sessions, or replace current core training in extisting training. The circiuts can also be completed as stand-alone training for endurance and other athletes.

Required Equipment?
These circuits are designed to be completed in any commercial or functional fitness gym. Exercise substitutes are included for gyms which don’t have sandbags or kettlebells.

How Fast should I work Through the Circuits?
The circuits are to be completed as 10-20 minute “grinds.” “Grind” equals work briskly, but not frantically. These are not “As many rounds as possible” efforts. Again, work briskly, not frantically.

What about Unfamiliar Exercises?
Visit our Exercises Page HERE.

What does “45/65#” or “12/16kg” mean?
This is the prescribed loading for women/men – so in the first example, women use 45# and men use 65#. In the second example, women use a 12kg kettlebell and men use a 16kg kettlebell.

Why is Chassis Integrity Is More Appropriate for Mountain and Tactical Athletes?
Foremost is its transferability outside the gym to the real world. The Chassis Integrity movements and exercises closely mirror the mid-section strength and strength endurance demands faced by mountain and tactical athletes. Most likely, these athletes will be lifting or moving something fairly heavy, bulky and awkward and deploying extension, rotation and isometric strength (total core) in one movements.

As well, sometimes real world midsection strength demands a single movement. But more often, mid-section strength is a strength endurance effort – think uphill hiking with a heavy pack for miles. Chassis Integrity, with it’s extended “grind” duration, trains not only the absolute midsection strength for single events, but also the strength endurance needed for extended work.

Have you and your athletes noticed a difference?
Absolutely – anecdotally, myself, I’ve seen a significant improvement in real-world midsection strength for activities like hauling out game from a backcountry hunt or getting firewood. Several of my athletes, both mountain and tactical, have reported similar improvement and experience. It’s like we’ve built and integrated band of muscle and functionality around our midsection.

Questions? Email

Required Equipment

These circuits are designed to be competed in any commercial or functional fitness gym. Exercise substitutes are included for gyms which don't have sandbags or kettlebells.

Sample Session

Obj: Chassis Integrity

(1) 15 Minute Grind

  • 3x Kneeling Plate Halfmoon @ 25/35#

  • 3x Keg Lift @ 40/60# Sandbag or 35/45# Plate

  • 3x Sandbag Clean** @ 40/60# or 6x Power Clean @ 65/95#

** 3x Sandbag Clean = 3x each side, 6x total.


Obj: Chassis Integrity

(1) 10 Minute Grind

  • 20/20 Standing Founder

  • 8x Good Morning @ 45/65#

  • 20/20 Kneeling Founder

  • 12x Swings @ 12/16kg


Obj: Chassis Integrity

(1) 15 Minute Grind

  • 5x Cauldron @ 10#

  • 5x Slasher @ 12/16kg

  • 10x Good Mornings @ 45#


Obj: Chassis Integrity

(1) 15 Minute Grind

  • 5x 1-Sided Dead Lift @ 10/20#

  • 5x Sandbag Get Up @ 40/60# or Turkish Get Up @ 10/20#**

  • 10x Hinge Lift @ 55/75#

**5x Total. Alternate Sides each Round


Obj: Chassis Integrity

(1) 15 Minute Grind

  • 5x Standing Russian Twist @ Empty Barbell

  • 5x Sandbag Toss and Chase @ 40/60# or 5x Power Clean + Push Press @ 55/75#

  • 10x Swing @ 12/16kg

Whats Next?


Resilience is a tactical-focused training plan which not only includes extensive Chassis Integrity, but strength, work capacity and military-inspired endurance (running & rucking).