This is Season 1, Episode 6: Hip Function in Normal and Pathological Gait

In this final part of the hip series, Dr. Dustin Hardwick (PhD in Movement Science, Physical Therapist) connects anatomy and muscle function to real-world movement. You’ll learn how the hip contributes to each phase of gait, from initial contact to terminal swing, and how internal and external moments shape stability and propulsion. We’ll also review common gait deviations—like Trendelenburg, dynamic valgus collapse, glute max lurch, and hip flexor contracture—and the underlying muscle mechanics behind them.

Whether you’re a student, clinician, or movement professional, this episode ties together the structure, function, and clinical implications of the hip in motion, setting the stage for our next unit on the lumbar spine.

Links:

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A breakdown of hip muscle actions, force couples, and their role in posture and movement.In this episode, Dr. Dustin Hardwick (PhD in Movement Science, Physical Therapist) reviews the muscles that cross the hip joint and their role in movement across all planes. You’ll learn the primary hip flexors and extensors, how abdominals stabilize hip flexion, the role of adductors and abductors in pelvic control, and why the posterior fibers of the gluteus medius are key for anti-gravity stability. We’ll also explore internal and external rotators, force couples for pelvic tilts, and how torque capacity differs among hip muscle groups. This episode connects anatomy to function and lays the groundwork for our upcoming discussion on the hip in gait.

Links:

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Welcome to The Movement PhD!
This is Season 1, Episode 4: The Hip Part 1
In this episode, Dr. Dustin Hardwick (PhD in Movement Science, Physical Therapist) breaks down the structures and mechanics of the hip joint. You’ll learn the key landmarks of the pelvis and femur, the role of the acetabular labrum and ligaments, and anatomical variations like coxa vara/valga or anteversion/retroversion. We’ll also cover open- and closed-chain osteo and arthrokinematic, and normal ranges of motion. Whether you’re a student, clinician, trainer, or movement enthusiast, this episode lays the foundation for understanding one of the most important joints in the body.

Links:

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In this mini-episode, Dr. Dustin Hardwick lays out the foundation for understanding the viscoelastic properties of tissues.

What You’ll Learn in This Episode:

• Anisotropy: Directional dependence of tissue properties • Load deformation curve and it's regions

• Young's modulus: Understanding tissue stiffness

• Viscoelastic properties: creep, stress relaxation, hysteresis, strain rate sensitivity

Welcome to The Movement PhD!

This is Season 1, Episode 3: Introduction to Muscle.

In this episode, Dr. Dustin Hardwick (PhD in Movement Science, Physical Therapist) breaks down the structure and function of skeletal muscle, the engine of human movement. You’ll learn how muscles are organized from whole muscle down to the sarcomere, how connective tissues contribute to force, and how motor units and fiber types are recruited to meet different demands. We’ll also cover the cross-bridge cycle, length–tension relationships, and how age, posture, and activity shape muscle performance. Whether you’re a physical therapy student, clinician, rehab professional, personal trainer, or simply curious about movement, this episode will give you the foundation to apply muscle concepts in practice and set the stage for our upcoming hip series.

Links:

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Welcome to The Movement PhD!

This is Season 1, Episode 2: The Gait Cycle.

In this episode, Dr. Dustin Hardwick (PhD in Movement Science, Physical Therapist) breaks down one of the most fundamental patterns of human movement: walking. You’ll learn the phases, key spatial and temporal descriptors, and the periods of the gait cycle. We’ll also translate between Traditional and Rancho Los Amigos terminology so you can speak both languages in clinic or class. Whether you’re a physical therapy student, clinician, rehab professional, personal trainer, or simply curious about movement, this episode will give you the language and terminology to explore gait further in our future episodes.

Chapters:

(00:00) Introduction to the Gait Cycle

(00:51) Understanding Gait: Definitions and Types

(01:48) Spatial Descriptors of Gait

(05:21) Temporal Descriptors of Gait

(09:23) Events of the Gait Cycle

(18:48) Traditional vs. Rancho’s Terminology

Links:

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Welcome to The Movement PhD!This is Season 1, Episode 1: Introduction to the Movement SystemIn this episode, Dr. Dustin Hardwick (PhD in Movement Science, Physical Therapist) lays the foundation for understanding how the body organizes and produces movement. Whether you’re a physical therapy student, clinician, rehab professional, personal trainer, or simply curious about biomechanics, this episode will help you build a strong framework for exploring human movement.

Timestamps:

(00:00) Introduction

(01:28) Anatomical Position

(02:03) The Sagittal Plane

(04:01) The Frontal Plane

(05:40) The Transverse Plane

(06:31) Open Chain vs Closed Chain Movements

(09:15) Osteokinematics vs Arthrokinematics

(11:12) The Convex-Concave Rule

(15:37) Impaired Arthrokinematics

(16:44) Muscle: Origins and Insertions

(17:51) Single-Joint vs Multi-Joint Muscles

(20:06) Types of Muscle Contractions

(23:13) Muscles: Agonists, Antagonists, and Synergists

(24:30) Muscle Force Vectors

(26:15) Internal vs External Forces

(26:55) Summing Force Vectors

(30:12) Moment Arms and Their Importance

(31:38) Introduction to Levers

(32:54) Types of Levers in the Body

(36:21) Next Time: The Gait Cycle

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Dr. Dustin Hardwick, PT, PhD, brings decades of movement science expertise to every episode, translating complex biomechanics and motor control research into clear, actionable insights .

Here’s what you can expect here at The Movement PhD:

• In-Depth Exploration of Movement: Each week, we’ll unpack the science of human movement, from joint mechanics to exercise analysis, combining cutting-edge research with real-world case studies .
• Practical Takeaways: Walk away with immediately applicable tips for improving performance, rehabilitation strategies, or just a deeper appreciation for how your body works.
• Community-Driven Content: This podcast is our space to learn together. Submit your questions or suggest topics you are struggling with to shape future episodes.

Whether you’re a student, clinician, trainer, or just interested in how the body moves, subscribe now to get notified of our weekly episodes:

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