Does a Hip Muscle Activation Home Exercise Program Change Movement Patterns on the Forward Step-Down Test?

Area of Science:

• Biomechanics
• Neuromuscular Control
• Exercise Science

Background:

• Poor knee biomechanics are linked to knee joint injuries.
• Hip neuromuscular control influences lower-extremity frontal plane mechanics.
• The impact of isolated gluteal muscle activation on frontal plane mechanics is not well understood.

Purpose of the Study:

• To investigate if a home-based hip muscle activation program improves frontal plane knee biomechanics.
• To assess the effect of the program on gluteal muscle activation using surface electromyography (sEMG).

Main Methods:

• A single-group, repeated-measures design was employed.
• Thirty-five participants completed an 8-week home-based hip muscle activation program.
• The Forward Step-Down Test and sEMG of gluteus maximus and medius were measured pre- and post-intervention.

Main Results:

• Forward Step-Down Test scores improved, but not to a clinically significant degree.
• Surface electromyography (sEMG) showed a significant increase in gluteus maximus activation.
• No dose-response relationship was found between compliance and test scores or sEMG results.

Conclusions:

• Home-based hip activation increases gluteus maximus activation.
• Clinically significant improvements in frontal plane movement quality were not observed.
• Future interventions may benefit from incorporating motor learning with activation training to enhance functional muscle use.