Ageism significantly impacts the health and well-being of older people.

Journals are adopting style guides to assist authors in using age-inclusive language and combat ageism.

Shifting to positive and neutral language in research supports the foundations of the decade of healthy ageing.

Reliability studies often show a lack of coherence among study purpose, design, choice of analysis, sample size justification, and reporting of results.

Possible explanations for this deficiency include vaguely structured purpose statements and limitations of statistical software packages.

This article provides resources to improve the coherence and reporting of reliability studies.

We explore how fear and avoidance can be learned and lead to disability.

We explore the fear learning theory to physical therapy clinical practice.

We discuss behavioral frameworks to address movement-related fear and avoidance.

We illustrate practical application through a patient case study.

Outcomes of the HRET are influenced by personal characteristics.

Female sex, higher BMI, and low activity level link to lower HRET metrics.

Normative values may help track recovery and guide rehabilitation plans.

Online tool for HRET estimates available at: www.achillestendontool.com/HRET.