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  2. The best stationary bikes for seniors in 2025 - AOL

    www.aol.com/lifestyle/best-stationary-bikes...

    Dual pedals let you choose between toe cages or clip-in cycling shoes, two water bottle holders help keep you hydrated, and the set of 3-pound dumbbells add versatility to your workouts, allowing ...

  3. Trainers Call This 'The Most Effective Exercise You Can Do ...

    www.aol.com/incorporating-quad-exercises-must...

    Take a big step forward with your right foot and bend at knee until both knees form 90-degree angles while bringing hands to clasp in front of body. Press down into the right heel to push back to ...

  4. Genu recurvatum - Wikipedia

    en.wikipedia.org/wiki/Genu_recurvatum

    Genu recurvatum is a deformity in the knee joint, so that the knee bends backwards. In this deformity, excessive extension occurs in the tibiofemoral joint. Genu recurvatum is also called knee hyperextension and back knee. This deformity is more common in women [citation needed] and people with familial ligamentous laxity. [2]

  5. Leg extension - Wikipedia

    en.wikipedia.org/wiki/Leg_extension

    The leg extension machine was created by American fitness guru Jack LaLanne in the 1950s. [3] The first prototype is recognized to have been made under Gustav Zander, but labeled the machine as a form of “mechanotherapy” along with other machines that extended the knee and ankle. [3] The machine was made to target the quadriceps.

  6. Squat (exercise) - Wikipedia

    en.wikipedia.org/wiki/Squat_(exercise)

    The barbell back squat Bodyweight squat. A squat is a strength exercise in which the trainee lowers their hips from a standing position and then stands back up. During the descent, the hip and knee joints flex while the ankle joint dorsiflexes; conversely the hip and knee joints extend and the ankle joint plantarflexes when standing up.

  7. Rectus femoris muscle - Wikipedia

    en.wikipedia.org/wiki/Rectus_femoris_muscle

    In essence: the action of extending the knee from a seated position is primarily driven by the vastus lateralis, vastus medialis, and vastus intermedius, and less by the rectus femoris. In the other extreme, the muscle's ability to flex the hip and extend the knee can be compromised in a position of full hip extension and knee flexion, due to ...

  8. Quadriceps - Wikipedia

    en.wikipedia.org/wiki/Quadriceps

    The quadriceps femoris muscle (/ ˈ k w ɒ d r ɪ s ɛ p s ˈ f ɛ m ər ɪ s /, also called the quadriceps extensor, quadriceps or quads) is a large muscle group that includes the four prevailing muscles on the front of the thigh. It is the sole extensor muscle of the knee, forming a large fleshy mass which covers the front and sides of the femur.

  9. Vastus medialis - Wikipedia

    en.wikipedia.org/wiki/Vastus_medialis

    Knee pain is thought to be primarily associated with specific quadriceps muscle weakness or fatigue, especially in the vastus medialis obliquus (VMO).It is known that fatigue can be caused by many different mechanisms, ranging from the accumulation of metabolites within muscle fibers to the generation of an inadequate motor command in the motor cortex. [4]

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