Two articles on PainSci cite Peng 2013: 1. The Complete Guide to Patellofemoral Pain Syndrome 2. Patellofemoral Pain & the Vastus Medialis Myth
original abstract †Abstracts here may not perfectly match originals, for a variety of technical and practical reasons. Some abstacts are truncated for my purposes here, if they are particularly long-winded and unhelpful. I occasionally add clarifying notes. And I make some minor corrections.
OBJECTIVES: To investigate the effects of submaximal and vigorous isometric hip adduction on the vastus medialis obliquus (VMO) and vastus lateralis (VL) activity during the leg press exercise from 90° of knee flexion until full extension.
SETTING: University biomechanics laboratory.
PARTICIPANTS: Ten healthy male college students.
MAIN OUTCOME MEASURES: Electromyographic (EMG) activation of VMO, VL and hip adductor longus (HAL) of the dominant leg were recorded during double leg press (LP), leg press with submaximal isometric hip adduction force (LP+), and leg press with vigorous isometric hip adduction force (LP++). The VMO, VL muscle activation, as well as the VMO/VL ratio between different leg press exercises were analyzed by MANOVA over concentric and eccentric phases, and in 15° increments of knee flexion motion. The effect size was calculated.
RESULTS: Neither LP+ nor LP++ changed the overall VMO-VL activation patterns. Specific to knee angle, however, small to medium effect size was shown with incorporation of isometric hip adduction to the leg press exercise for VMO/VL ratio.
CONCLUSION: Targeted training using the leg press exercise to the last 45° of knee extension/flexion with vigorous hip adduction may be useful in promoting a greater VMO/VL ratio.
- “Activities of the Vastus Lateralis and Vastus Medialis Oblique Muscles during Squats on Different Surfaces,” In Hyouk Hyong and Jong Ho Kang, J Phys Ther Sci, 2013.
- “Effects of the slow speed-targeting squat exercise on the vastus medialis oblique/vastus lateralis muscle ratio,” Won-Gyu Yoo, J Phys Ther Sci, 2015.
- “Analysis of vastus lateralis and vastus medialis oblique muscle activation during squat exercise with and without a variety of tools in normal adults,” Tae-Kyung Lee, So-Mi Park, Sae-Bom Yun, Ae-Ran Lee, Yun-Seob Lee, and Min-Sik Yong, J Phys Ther Sci, 2016.
- “The Effect of Altering Knee Position and Squat Depth on VMO : VL EMG Ratio During Squat Exercises,” Shapour Jaberzadeh, Daniel Yeo, and Maryam Zoghi, Physiother Res Int, 2016.
- “The effect of closed-kinetic chain exercises and open-kinetic chain exercise on the muscle activity of vastus medialis oblique and vastus lateralis,” Sian E Irish, Adam J Millward, James Wride, Bernhard M Haas, and Gary L K Shum, Journal of Strength & Conditioning Research, 2010.
This page is part of the PainScience BIBLIOGRAPHY, which contains plain language summaries of thousands of scientific papers & others sources. It’s like a highly specialized blog. A few highlights:
- Exercise and education versus saline injections for knee osteoarthritis: a randomised controlled equivalence trial. Bandak 2022 Ann Rheum Dis.
- Association of Lumbar MRI Findings with Current and Future Back Pain in a Population-based Cohort Study. Kasch 2022 Spine (Phila Pa 1976).
- A double-blinded randomised controlled study of the value of sequential intravenous and oral magnesium therapy in patients with chronic low back pain with a neuropathic component. Yousef 2013 Anaesthesia.
- Is Neck Posture Subgroup in Late Adolescence a Risk Factor for Persistent Neck Pain in Young Adults? A Prospective Study. Richards 2021 Phys Ther.
- Sudden amnesia resulting in pain relief: the relationship between memory and pain. Choi 2007 Pain.