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2. List of weight training exercises - Wikipedia

   en.wikipedia.org/wiki/List_of_weight_training...

   Leg extension machine. The leg extension is performed while seated by raising a weight out in front of the body with the feet. It is an isolation exercise for the quadriceps. Overtraining can cause patellar tendinitis. [4] The legs extension serves to also strengthen the muscles around the knees and is an exercise that is preferred by physical ...

3. Lombard's paradox - Wikipedia

   en.wikipedia.org/wiki/Lombard's_paradox

   The rectus femoris biarticular muscle acting over the hip has a smaller hip moment arm than the hamstrings. However, the rectus femoris moment arm is greater over the knee than the hamstring knee moment. This means that contraction from both rectus femoris and hamstrings will result in hip and knee extension.

4. Arm folding - Wikipedia

   en.wikipedia.org/wiki/Arm_folding

   Once adopted, manner of arms folding across the chest does not change throughout the lifetime and persons easily give up the unusual folding position, most commonly at the first attempt. If the right arm is folded above the left forearm , the phenotype is characterised as R (right; the right type), and in the opposite case, i.e. if the left arm ...

5. List of extensors of the human body - Wikipedia

   en.wikipedia.org/wiki/List_of_extensors_of_the...

   In anatomy, extension is a movement of a joint that increases the angle between two bones or body surfaces at a joint. Extension usually results in straightening of the bones or body surfaces involved. For example, extension is produced by extending the flexed (bent) elbow. Straightening of the arm would require extension at the elbow joint.

6. 8 Folding Exercise Bikes for a Space-Saving Cardio Workout

   www.aol.com/lifestyle/8-folding-exercise-bikes...

   The best foldable exercise bikes offer convenient storage and portability, feature adjustable seats and pedals, and provide various resistance levels. 8 Folding Exercise Bikes for a Space-Saving ...

7. Leg extension - Wikipedia

   en.wikipedia.org/wiki/Leg_extension

   The leg extension is a resistance weight training exercise that targets the quadriceps muscle (m. quadriceps femoris) [1] in the legs. The exercise is done using a machine called the Leg Extension Machine. There are various manufacturers of these machines and each one is slightly different. The leg extension is an isolated exercise targeting ...