quadriceps

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quadriceps

[′kwä·drə‚seps]
(anatomy)
Four-headed, as a muscle.
References in periodicals archive ?
"The psoas muscles originate at the sides of the lower vertebrae (in your spine) and run down through the pelvis, where it joins the iliacus (another hip flexor) and attaches to the femur or thigh bone," explains Dana Aaron, an advanced clinician at the Weill Cornell-affiliated Hospital for Special Surgery's Sports and Performance Center.
The participants performed static stretches of the hip flexors and extensors.
"However, when the hip flexors become tight, it causes excessive extension in the low back, which can cause the back extensors to become hyperactive, and spinal nerves become compressed," says Salazar.
This study involved 18 male University varsity athletes that were subdivided into two groups: 1) Low back pain with tight hip flexors (n = 10, age = 22.2 [+ or -] 4.3 years, mass = 85.9 [+ or -] 19.1 kg), or 2) Asymptomatic subjects with tight hip flexors (A-THF): asymptomatic subjects having bilateral tight hip flexors but no LBP (n = 8, age = 22.5 [+ or -] 2.1 years, mass = 84.0 [+ or -] 11.0 kg) (Table 1).
The hip flexors (iliacus, psoas) and knee flexors (biceps femoris long and short head) showed the largest increase in force (272, 271, 334, and 356 N in double support, resp.), while the plantar flexors (medial gastrocnemius, tibialis posterior, and soleus) and dorsiflexors (tibialis anterior) showed the largest decrease in force over both the full gait cycle and double support (-1228, -1659, -265, and -1367N in double support, resp.).
Perhaps the training of the hip flexors is of little advantage to cyclists because the down stroke is where almost all of the power is produced in cycling (6).
"Such exercises also make the muscles surrounding the bones--in particular, the hip flexors and the gluteals--stronger and more flexible, providing a better range of motion that can help make you more agile and better able to avoid falls." Dr.
Within the sagittal plane, the posture of the pelvis is determined by four muscle groups: hip flexors, hip extensors (gluteal and hamstring muscles) (Figure 4); and paraspinal trunk extensors (low back muscles) and trunk flexors (anterior abdominal wall muscles) (Figure 5).
The muscle groups we assessed were the hip flexors and hip extensors, and the separate muscles we tested were the knee flexors, knee extensors, ankle dorsiflexor, and ankle plantar flexors (gastrocnemius and soleus).
TARGET AREA: This exercise strengthens the hip flexors and abdominal muscles.
Male players activate the hip flexors (inside of the hip) in their kicking leg and the hip abductors (outside of the hip) in their supporting leg more than females.