The women then
did knee extensions while the researchers used these electrodes to measure the activity of motor units in those muscles.
We are
doing knee extension and hip extension Which would be the glutes and quads primarily.
Not exact matches
If you have bad
knees, use light weights when
doing squats or leg
extensions.
When you're
doing leg
extensions, you need to go from a complete stretch to a complete contraction and then into lockout of your
knees.
By
doing this, out are working in direct opposition to the triple
extension of the squat by way of loading your hip, ankle, and
knee flexion.
For example, quads to
knee and hip
extension — hamstrings
do knee and hip flexion.
You should move in slow, controlled motions, not zipping back and forth quickly;
do it from your
knees until you feel confident and stronger to try it standing; and start with only rolling a distance of about 1 - 2 feet with a wall in front of you to stop yourself, and work your way up gradually to longer
extensions.
Another reason the
knee extension is not recommended by some physical therapists and personal trainers is that it doesn't improve the functions of running and jumping as efficiently as squats or lunges.
If you opt to
do the leg
extension the biggest benefit is for strength around the
knee joint at the last 20 - to - 30 degree of motion.
For the chair exercise, repetitions of toe raises, heel raises,
knee lifts,
knee extensions, and others were
done while seated on a chair.
To strengthen the muscles around your
knees, I have clients lie on the floor and
do Hip
Extensions, 1 - Leg Hip
Extensions, and Stability Ball Leg Curls.
This doesn't mean violently locking out your
knees and potentially going into hyperextension, but you should complete full
knee extension so your legs are straight at the top of each rep.
Lying Bend -
Knee Leg
Extension — In order to get the most from this exercise, you will need to
do it as slow as possible and control your legs.
Imagine
doing a leg
extension with your hips down, your
knees up level with your chest and your heels forced back underneath your butt.
As you begin to reach the end of the movement stop just before full
extension and
do not lock out
knees!
«Lots of people have a tendency to pull before they reach full
knee extension,» points out Alex. «With our legs being so powerful, a lot of energy gets wasted if we don't make full use of them.
This is the same for your
knees (don't lock them back in full
extension, bring them back slightly to where their is a good wiggle) as it is your lumbar spine.
However, if
extensions hurt your
knees, don't
do them.
Hip
extension,
knee extension, and ankle plantar - flexion net joint moments increased markedly as side - step distance increased, while hip abduction net joint moments
did not alter much at all.
Moreover, Lloyd and Buchanan (2001) noted that the gracilis
does possess a muscle moment arm that is supportive of
knee valgus moments during
knee extension movements.
However, noting the significant gain in hip
extension in the intervention group from prelunge to postlunge in the second session and comparing them to the results reported by Macdonald et al. (6) of immediate gains in
knee flexion angle post foam rolling, it is reasonable to conclude that the effects of foam rolling are immediate, even in a dynamic movement, but
do not remain for longer bouts of time.
The
knee extension moment of the rear leg
did not differ between conditions.
Similarly, Fujisawa et al. (2014) found that hip flexion angle
did not affect gluteus medius muscle activity when the
knee was in full
extension during isometric hip abduction.
barbell hip thrusts and barbell hip bridges
done very heavy, banded at the
knees (to engage the glute medius / minimus) and with full hip
extension at the top
Later similar research confirmed this, as the increases in hip
extension net joint moments with increasing running speed were found to be greater than the increases in
knee extension net joint moments, or work
done (Simpson & Bates, 1990; Belli et al. 2001; Kuitunen et al. 2002; Schache et al. 2011; 2014; 2015).