Move Better, Ache Less: How Functional Training Supports a Healthier Back and Joints

A stiff lower back after a long day at the desk. Knees that complain on the stairs. Shoulders and neck that feel tight by Friday. These everyday aches are among the most common reasons adults start (or stop) exercising. Low back pain alone is the leading cause of years lived with disability worldwide, according to the Global Burden of Disease studies.

The good news: one of the most consistently supported tools for feeling better is movement itself, especially well-planned, progressive training. This is where functional training, as taught by coaches like Michael Boyle, earns its place.

What "functional training" actually means

Functional training is not about balancing on unstable surfaces or doing circus tricks. In Michael Boyle's work (Functional Training for Sports, Advances in Functional Training and New Functional Training for Sports), the idea is simple: train movements, not just muscles.

Instead of isolating one muscle at a time, a functional program is built around the basic patterns the body uses every day and in sport:

• Squat and hinge (sitting down, picking things up from the floor)

• Single-leg work (walking, climbing stairs, running)

• Push and pull (lifting, carrying, reaching overhead)

• Carries (groceries, kids, luggage)

• Core work that resists unwanted movement of the spine (anti-extension, anti-rotation, anti-lateral flexion)

The goal is to make the body more capable and more resilient in real life.

The joint-by-joint approach

One of the most influential ideas in this field is the joint-by-joint approach, popularized by Michael Boyle and physical therapist Gray Cook. It looks at the body as a stack of joints that alternate between two main needs:

• Ankle: mobility

• Knee: stability

• Hip: mobility

• Lumbar spine (lower back): stability

• Thoracic spine (upper back): mobility

• Scapula (shoulder blade): stability

• Shoulder (glenohumeral joint): mobility

The key insight: when a joint that should be mobile becomes stiff, a neighboring joint often picks up the slack and starts moving in ways it was not designed to handle well. A few classic examples:

• Stiff hips can push more movement into the lower back.

• Stiff ankles can shift extra stress to the knees.

• A stiff upper back can make the neck and shoulders work harder.

It is a coaching model, not a diagnosis, and the human body is more complex than any simple map. Still, it is a very practical way to organize training: restore mobility where the body needs mobility, and build stability and strength where the body needs control.

What the research says about exercise and everyday aches

The connection between exercise and fewer aches is not just coaching intuition:

• A large Cochrane review (Hayden et al., 2021), pooling about 250 trials, found that exercise reduces pain and improves function in adults with persistent non-specific low back pain compared with no exercise or usual care.

• Clinical guidelines, such as those from the UK's National Institute for Health and Care Excellence (NICE), list exercise as a core recommendation for managing low back pain.

• For knee osteoarthritis, another Cochrane review (Fransen et al., 2015) found that land-based exercise reduces pain and improves physical function.

An important detail from this research: no single type of exercise clearly wins. Consistency, gradual progression and choosing something the person will actually keep doing matter more than any "perfect" exercise. Training also builds confidence. When people realize they can bend, lift and carry safely, the fear of movement tends to fade, and that alone changes how the body feels day to day.

Putting it into practice: six principles

1. Restore mobility where it belongs. Focus on the hips, ankles and upper back. Simple drills like half-kneeling hip flexor stretches, ankle rocks and thoracic "open books" help these joints do their share of the work.

2. Build a stable, strong core. Instead of endless crunches, train the trunk to resist movement. Dead bugs, bird dogs, side planks and Pallof presses are staples. Spine researcher Stuart McGill's "Big Three" (curl-up, side plank and bird dog) are a well-known starting point.

3. Master the hip hinge. Learning to bend from the hips with a neutral spine is one of the most useful skills for anyone who picks things up from the floor. Glute bridges, Romanian deadlifts and kettlebell deadlifts build strength in this pattern.

4. Train one leg at a time. Split squats, step-ups and single-leg Romanian deadlifts build strength and control around the hips and knees, the same qualities needed for stairs, walking and running.

5. Progress gradually. Tissues adapt to load, but they adapt over time. Start a little easier than feels necessary and increase volume or load in small steps. Mild, short-lived discomfort during training is common; sharp pain or pain that keeps getting worse is a signal to stop and get it checked.

6. Move often, not just during workouts. Breaking up long periods of sitting with short walks or a few mobility drills keeps joints moving throughout the day.

A simple starting routine

Two or three times a week, 15 to 20 minutes:

• Ankle rocks: 2 x 8 per side

• Half-kneeling hip flexor stretch: 2 x 30 seconds per side

• Thoracic open books: 2 x 8 per side

• Dead bug: 2 x 6 per side

• Glute bridge: 2 x 10

• Split squat (bodyweight): 2 x 8 per side

• Side plank (from the knees if needed): 2 x 20 seconds per side

Smooth, controlled reps matter more than speed or load. As everything feels easy, add reps, time or a light weight.

An important note

This article is educational and is not medical advice. Training is not a substitute for diagnosis or treatment by a healthcare professional. If pain is severe, started after a fall or injury, keeps getting worse, comes with numbness, tingling or weakness in the legs or arms, changes in bladder or bowel control, fever or unexplained weight loss, or does not ease at night, see a physician or physical therapist first. A good coach works alongside healthcare professionals, not in place of them.

How the Method applies this

At PL Strength & Conditioning, every program in the Method is built on these principles: mobility where the body needs it, stability and strength where it needs control, and gradual, sustainable progression. The aim is to help people move better, feel more capable in daily life and keep training for the long run.

Ready to start moving better? Start online coaching

References

• Boyle M. New Functional Training for Sports. 2nd ed. Human Kinetics; 2016.

• Cook G. Movement: Functional Movement Systems. On Target Publications; 2010.

• Hayden JA, et al. Exercise therapy for chronic low back pain. Cochrane Database of Systematic Reviews. 2021.

• Fransen M, et al. Exercise for osteoarthritis of the knee. Cochrane Database of Systematic Reviews. 2015.

• National Institute for Health and Care Excellence. Low back pain and sciatica in over 16s: assessment and management (NG59).

• McGill S. Low Back Disorders: Evidence-Based Prevention and Rehabilitation. 3rd ed. Human Kinetics; 2016.

• GBD 2021 Low Back Pain Collaborators. Global, regional, and national burden of low back pain, 1990–2020. The Lancet Rheumatology. 2023.