HIP EXTENSION with KNEE FLEXED – RESEARCH

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MOVEMENTS at the HIP and the KNEE

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STRETCH ILIOPSOAS before HIP EXTENSION with KNEE FLEXED

GLUTEUS MAXIMUS, BICEPS FEMORIS, ERECTOR SPINAE, MULTIFIDUS
– Prone Hip Extension with Knee Flexed @90º

Comparison of Prone Hip Extension and Prone Hip Extension after Iliopsoas Stretching on Lumbopelvic Control and Gluteus Maximus Activity in Subjects with Short Iliopsoas – 2017 – Jeon
Procedure
(1) Prone Hip Extension
(2) Prone Hip Extension after Iliopsoas stretching on gluteus maximus activity and angle of anterior tilt and rotation of lumbopelvic region and hip extension in subjects with short iliopsoas
Results
Gluteus Maximus: muscle activity of glute max and hip extension angle were increased
Biceps Femoris: decreased activity
+ Erector Spinae: decreased activity
+ Multifidus: slight increase

LEG at multiple degrees of KNEE FLEXION

GLUTEUS MAXIMUS, HAMSTRINGS
– Prone Hip Extension with Knee Flexed 90º + Hip Ab-ducted 0°, 15°, and 30°.

Activation of gluteus maximus and hamstring during prone hip extension with knee flexion in 3 hip ab-duction positions – 2013 – Kang
Procedure
– The direction of fiber alignment within a muscle is known to influence the effectiveness of muscle contraction
– prone on examining table with knee flexed at 90º in 3 hip ab-duction positions: 0°, 15°, and 30°.
Electrode Placement
– Gluteus Maximus: halfway between the greater trochanter and second sacral vertebra in the middle of the muscle and at an oblique angle
– Hamstrings: placed parallel to the muscle fibers on the posterior aspect of the thigh, approximately halfway between the gluteal fold and the popliteal fold
Results
Gluteus Maximus: 30° >> 15° > 0°
Hamstrings: 0° > 15° > 30°

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GLUTEUS MAXIMUS, RECTUS FEMORIS, VASTUS LATERALIS, VASTUS MEDIALIS
– Standing Kickback vs. Leg Press vs. Knee Extension

Electromyographic Comparison of Five Lower-Limb Muscles between Single- and Multi-Joint Exercises among Trained Men – 2021
– Nicolay Stien, Atle Hole Saeterbakken, and Vidar Andersen
Procedure
– 15 resistance-trained men
Exercises
1. Leg Press: starting position 90° knee flexion; 60° hip flexion; extended knee to 180° and hip joints 150°
2. Knee Extension: started at 90° knee flexion; performed to a full extension 180°
3. Kickback: standing; 90° angle in the hip joint; knee semi-extended 170°; concentric 180° in the hip joint
Results
Gluteus Maximus: leg press 90 | kickback 80
Rectus Femoris: knee extension 95 | leg press 70
Vastus Lateralis: leg press 105 | knee extension 90
Vastus Medialis: leg press 95 | knee extension 80
+ Biceps Femoris: kickback 105 | leg press 30

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GLUTEUS MAXIMUS UPPER & LOWER, GLUTEUS MEDIUS
– Prone Hip Extension with Knee Flexed @90º

The effects of therapeutic hip exercise with abdominal core activation on recruitment of the hip muscles – 2017 – Chan
Procedure
· 2 conditions: Natural Core Activation, Enhanced Core Activation
Results
Clam: hip flexed 45° . knees flexed to 90° . hip abduction 30° . hip external rotation 30°
· upper glute max 40 . glute medius 15 . lower glute max 5
Side-Lying Hip Ab-duction: to 30° with knee fully extended
· upper glute max 30 . glute medius 30 . lower glute max 5
Prone Hip Extension: knee flexed to 90° . hip extension up to 20°
· lower glute max 25 . upper glute max 20 . glute medius 20 . biceps femoris 20

GLUTEUS MAXIMUS
1. Quadruped Kick-up with Knee Flexed @90º
2. Quadruped Hip Extension with Knee Starting @90º Extending to Straight

Which Exercises Target the Gluteal Muscles While Minimizing Activation of the Tensor Fascia Lata? – 2013 – Selkowitz
Procedure
– determine which exercises are best for activating the gluteus medius and the superior portion of the gluteus maximus, while minimizing activity of the tensor fascia lata (TFL).
Fine Wire Electrodes
–  SUP-GMAX: superior and lateral to midpoint of a line drawn b/n the posterior superior iliac spine and posterior greater trochanter.
– GMED: inserted 2.5 cm distal to the midpoint of the iliac crest (ie, middle portion).
– TFL: inserted distal and slightly lateral to the anterior superior iliac spine and medial and superior to the greater trochanter.
Exercises
Hip extension in quadruped on elbows with knee flexed: This exercise was performed in the same manner as described for quadruped with knee extending, except that the subject maintained the knee in 90° of flexion throughout the exercise.
Hip extension in quadruped on elbows with knee extending: Starting position was quadruped, with the upper body supported by the elbows and forearms, and the knees and elbows at approximately 90° of flexion. The subject then lifted the tested lower limb up and backward, extending the hip and knee to 0°, and then returned to the starting position.

Results