Short answer

Design exercise or rehabilitation programs with a maintenance phase that reduces stretching frequency to three times per week to sustain flexibility gains.

Field: Human Factors
Source: AUT Scholarly Commons (2012)
Method: Randomized controlled trial with repeated measures
Sample: 63 participants
Evidence: Strong effect

Maintaining improved knee extension range of motion after an initial stretching program requires a reduced, but consistent, frequency of stretching, with once-daily stretching three times per week proving effective. This human factors research insight is drawn from a 2012 study published in AUT Scholarly Commons. Using Randomized controlled trial with repeated measures with 63 participants, researchers explored how this design variable affects real-world outcomes. The key design takeaway: Design exercise or rehabilitation programs with a maintenance phase that reduces stretching frequency to three times per week to sustain flexibility gains.

Study

Human FactorsHigh ImpactStrong effect

Optimal Hamstring Stretch Frequency for Sustained Knee Extension Range of Motion

AUT Scholarly Commons · 2012

Key Findings

01Stretching once a day, three times a week, effectively maintained knee extension range of motion gained from an initial program.
02Stretching once a week was insufficient to maintain the achieved range of motion.
03A control group showed a decrease in range of motion over the study period.

Application

Design takeaway

Design exercise or rehabilitation programs with a maintenance phase that reduces stretching frequency to three times per week to sustain flexibility gains.

How to apply

When designing a stretching regimen, plan for an initial intensive phase followed by a less frequent maintenance phase to ensure long-term adherence and effectiveness.

Project actions

01Consider how different frequencies of physical activity impact long-term user engagement.
02Investigate the 'washout' period for physical adaptations in your chosen design context.

Method & Evidence

AimWhat is the optimal frequency of ongoing hamstring stretching needed to maintain knee extension range of motion after an initial six-week stretching program?

MethodRandomized controlled trial with repeated measures

ProcedureParticipants underwent an initial six-week stretching program. Post-program, they were assigned to groups that continued stretching either three times per week, once per week, or not at all, for an additional six weeks, while knee extension range of motion was measured.

Sample63 participants

ContextPhysical rehabilitation and exercise science

Variables

IVFrequency of ongoing hamstring stretching (3 times/week, 1 time/week, 0 times/week).

DVKnee extension range of motion.

CVInitial stretching program duration and frequency, duration of the maintenance phase, type of stretch, participant demographics (age, sex).

Strengths & Limitations

Strengths

+Randomized controlled trial design enhances internal validity.
+Inclusion of a control group allows for comparison against no intervention.

Limitations

The study participants were all young males, so the findings might not apply to older adults, women, or people with existing injuries.

Reliability & validity

The use of a randomized controlled trial and repeated measures strengthens the reliability and validity of the findings regarding the effectiveness of different stretching frequencies.

Think critically

How might the psychological factors of adherence and perceived effort influence the effectiveness of different stretching frequencies in a real-world design application?

Design Principles

"Progressive overload and maintenance phases are essential for long-term physiological adaptation."

Understanding the optimal frequency for maintaining flexibility gains is crucial for designing effective exercise and rehabilitation programs. This insight helps in creating sustainable routines that balance efficacy with user adherence, preventing the loss of achieved range of motion without imposing an overly burdensome regimen.

What This Means for Your Design

To keep your muscles flexible after you've worked hard to make them more flexible, you don't need to stretch as often. Stretching three times a week is enough to keep the flexibility you gained.

How to use in your project

1.Use this study to justify the frequency of a proposed exercise or rehabilitation intervention in your design project.

Add to My Project

Quick Cite

Paragraph starter

Research indicates that maintaining flexibility gains requires a reduced, yet consistent, stretching frequency. Following an initial six-week program, continuing to stretch three times per week was found to be effective in sustaining knee extension range of motion, whereas stretching only once per week was insufficient.

Source

AUT Scholarly Commons

The frequency of hamstring stretches required to maintain knee extension range of motion following an initial six-week stretching programme

journal · 2012

View source

Questions About This Research

What does the research say about optimal hamstring stretch frequency for sustained knee extension range of motion?: Design exercise or rehabilitation programs with a maintenance phase that reduces stretching frequency to three times per week to sustain flexibility gains. Evidence: AUT Scholarly Commons (2012).
Why does "Optimal Hamstring Stretch Frequency for Sustained Knee Extension Range of Motion" matter for design?: Understanding the optimal frequency for maintaining flexibility gains is crucial for designing effective exercise and rehabilitation programs. This insight helps in creating sustainable routines that balance efficacy with user adherence, preventing the loss of achieved range of motion without imposing an overly burdensome regimen.
How can designers apply this research?: Design exercise or rehabilitation programs with a maintenance phase that reduces stretching frequency to three times per week to sustain flexibility gains.
What were the main findings?: Stretching once a day, three times a week, effectively maintained knee extension range of motion gained from an initial program.. Stretching once a week was insufficient to maintain the achieved range of motion.. A control group showed a decrease in range of motion over the study period.
What research method was used?: Randomized controlled trial with repeated measures with 63 participants.
How strong is the evidence?: Evidence strength is rated Strong effect, based on a 2012 journal from AUT Scholarly Commons.
What should I do differently in my next project?: When designing a stretching regimen, plan for an initial intensive phase followed by a less frequent maintenance phase to ensure long-term adherence and effectiveness.
What are the limitations?: The study focused on young males, and results may differ in other demographics or with different types of stretches or muscle groups.