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  2. Hypnic jerk - Wikipedia

    en.wikipedia.org/wiki/Hypnic_jerk

    A hypnic jerk, hypnagogic jerk, sleep start, sleep twitch, myoclonic jerk, or night start is a brief and sudden involuntary contraction of the muscles of the body which occurs when a person is beginning to fall asleep, often causing the person to jump and awaken suddenly for a moment.

  3. What Muscles Are Used in Jumping Jacks? Trainers Break It Down

    www.aol.com/lifestyle/muscles-used-jumping-jacks...

    "The deltoids are located at the top of the arm and cover the shoulder joint," Julom explains. "When doing jumping jacks, the arms move up and down, engaging the deltoids and building strength and ...

  4. Kohnstamm's phenomenon - Wikipedia

    en.wikipedia.org/wiki/Kohnstamm's_phenomenon

    The arm will involuntarily rise. Russian scientists Victor Gurfinkel, Mikhail Lebedev and Yuri Levick used Kohnstamm's phenomenon to activate tonogenic structures in humans and thereby demonstrate postural automatisms, such as neck reflexes.

  5. Camptocormia - Wikipedia

    en.wikipedia.org/wiki/Camptocormia

    A clinical photograph showing a patient with the flexed posture. It can be abated when lying down. [1]Camptocormia, also known as bent spine syndrome (BSS), is a symptom of a multitude of diseases that is most commonly seen in the elderly.

  6. Here’s why everyone’s jumping on the trampoline fitness craze ...

    www.aol.com/lifestyle/why-everyone-jumping...

    This 36-inch trampoline uses 30 tension bands to provide a safe, supportive and whisper-quiet foundation for your workout. Burn calories, boost your heart health and increase muscle tone — this ...

  7. Why Scaling Back On Your Workouts Is The Key To Bigger ... - AOL

    www.aol.com/why-scaling-back-workouts-key...

    Don’t just jump back into your regular programming willy-nilly after a rest period—you’ll want to gradually ramp your volume and workouts back up so your body doesn’t take on too much ...

  8. List of human positions - Wikipedia

    en.wikipedia.org/wiki/List_of_human_positions

    Log (15%) – lying on one's side with the arms down the side. Yearner (13%) – sleeping on one's side with the arms in front. Soldier (8%) – on one's back with the arms pinned to the sides. Freefall (7%) – on one's front with the arms around the pillow and the head tilted to one side.

  9. Rebound exercise - Wikipedia

    en.wikipedia.org/wiki/Rebound_exercise

    A pair of jumpers A mini-trampoline.. Rebound exercise (or “rebounding”) is a type of elastically leveraged low-impact exercise usually performed on a device known as a rebounder—sometimes called a "mini-trampoline" or "fitness trampoline"—which is directly descended from regular sports or athletic trampolines.