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Dr Steph Lazarczuk
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Dr Steph Lazarczuk
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Blog posts from Dr Steph Laz

Recent Podcast Appearances

AASpt: Hamstring Adaptation to Training

How I Rehab #33 – Research review of biceps femoris long head muscle & aponeurosis geometry

How I Rehab #33 – Research review of biceps femoris long head muscle & aponeurosis geometry

Steph discusses some of the research relating to hamstring tendon adaptation and some of her key philosophies.


Jan 2025

Watch here

How I Rehab #33 – Research review of biceps femoris long head muscle & aponeurosis geometry

How I Rehab #33 – Research review of biceps femoris long head muscle & aponeurosis geometry

How I Rehab #33 – Research review of biceps femoris long head muscle & aponeurosis geometry

In this episode from the Sports MAP network, Steph discusses her recent paper focusing on Biceps femoris long head changes after injury.


May 2024 

Listen here

Recent Journal publications

Differences in Hamstring Muscle-Tendon Unit Geometry and Function Between Elite Sprint and Jump Athletes and Recreationally Active Controls

Differences in Hamstring Muscle-Tendon Unit Geometry and Function Between Elite Sprint and Jump Athletes and Recreationally Active Controls

Differences in Hamstring Muscle-Tendon Unit Geometry and Function Between Elite Sprint and Jump Athletes and Recreationally Active Controls

Just how different are the hamstrings of elite-level sprint and jumps (long, triple) athletes in comparison to your recreationally active individuals?


In: Scandinavian Journal of Medicine & Science in Sports

Year: 2025


(Available Open Access)

Read here

Hamstring Muscle-Tendon Geometric Adaptations to Resistance Training Using the Hip Extension and Nordic Hamstring Exercises

Differences in Hamstring Muscle-Tendon Unit Geometry and Function Between Elite Sprint and Jump Athletes and Recreationally Active Controls

Differences in Hamstring Muscle-Tendon Unit Geometry and Function Between Elite Sprint and Jump Athletes and Recreationally Active Controls

Read about the adaptation of hamstring tendons to resistance training with two commonly employed exercises. This complements an earlier paper documenting muscle adaptation.


In: Scandinavian Journal of Medicine & Science in Sports

Year: 2024


(Available Open Access)

Read here

Hamstring Strain Injury Prevention: Current Beliefs and Practices of Practitioners Working in Major League Baseball

Differences in Hamstring Muscle-Tendon Unit Geometry and Function Between Elite Sprint and Jump Athletes and Recreationally Active Controls

Biceps femoris long head muscle and aponeurosis geometry in males with and without a history of hamstring strain injury

With a focus on Athletic Trainers, Physical Therapists and Strength & Conditioning coaches, this study identifies key beliefs and practices being used across Major League Baseball in relation to hamstring strains.


In: Journal of Athletic Training

Year: 2024


(Available Open Access)

Read here

Biceps femoris long head muscle and aponeurosis geometry in males with and without a history of hamstring strain injury

Mechanical, Material and Morphological Adaptations of Healthy Lower Limb Tendons to Mechanical Loading: A Systematic Review and Meta-Analysis

Biceps femoris long head muscle and aponeurosis geometry in males with and without a history of hamstring strain injury

Hamstring injuries are highly prevalent in most sports. This study identifies key differences in hamstring tendon geometry in those with prior injury versus those without.


In: Scandinavian Journal of Medicine & Science in Sports

Year: 2024


(Available Open Access)

Read here

Vertical Jump Testing after Anterior Cruciate Ligament Reconstruction: A Systematic Review and Meta-analysis

Mechanical, Material and Morphological Adaptations of Healthy Lower Limb Tendons to Mechanical Loading: A Systematic Review and Meta-Analysis

Mechanical, Material and Morphological Adaptations of Healthy Lower Limb Tendons to Mechanical Loading: A Systematic Review and Meta-Analysis

ACL injuries are a hot topic but what patterns should you be watching for when using vertical jump testing methods post-reconstruction?


In: Medicine & Science in Sports & Exercise

Year: 2024

Read here

Mechanical, Material and Morphological Adaptations of Healthy Lower Limb Tendons to Mechanical Loading: A Systematic Review and Meta-Analysis

Mechanical, Material and Morphological Adaptations of Healthy Lower Limb Tendons to Mechanical Loading: A Systematic Review and Meta-Analysis

Mechanical, Material and Morphological Adaptations of Healthy Lower Limb Tendons to Mechanical Loading: A Systematic Review and Meta-Analysis

This review paper highlights the programming variables which induce change in healthy lower limb tendon properties.


In: Sports Medicine

Year: 2022

Read here

External Blog posts and publications

Measuring Hamstring Muscle-Tendon Unit Geometry

How to maximise tendon adaptation for sports performance

How to maximise tendon adaptation for sports performance

Check out this PhD Pinboard blog post hosted by Sports Science legend Jo Clubb where Steph explores the impact of training on hamstring muscle-tendon unit geometry. 

Read here

How to maximise tendon adaptation for sports performance

How to maximise tendon adaptation for sports performance

How to maximise tendon adaptation for sports performance

Steph writes for Sportsmith on the topic of tendon adaptation, which programming variables seem optimal, and covers some common misconceptions regarding contraction modes.

Read here

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