Stability of the spine is necessary for preventing pain and enhancing performance (Liebenson, 2006; McGill, 2006). Core muscle endurance is a key quality to train. Many exercises have been developed for the core including traditional ones such as sit-ups which have been recently called into question (McGill, 2006). Training the spine in a neutral posture which reinforces the natural upright cur...

Objective To study the criterion-related validity of simple muscle strength test (SMST) indicators and assess whole body muscle strength in Chinese children aged 10 to 12 years old. Methods Two hundred and forty children were equally divided into four groups in different genders and residences. The SMST indicators (hand-grip, knee bent push-up, back muscle strength, sit-up, leg muscle strengt...

In this note, we reconcile two approaches that have been used to construct stringy multiplications. The pushing forward after pulling back that has been used to give a global stringy extension of the functors K0, K , A, H[CR, FG, AGV, JKK2], and the pulling back after having pushed forward, which we have previously used in our (re)-construction program for G–Frobenius algebras, notably in consi...

PURPOSE This study was conducted to quantify the normalized amplitudes of the abdominal wall and back extensor musculature during a variety of push-up styles. We also sought to quantify their impact on spinal loading by calculating spinal compression and torque generation in the L4-5 area. METHODS Ten university-age participants, nine males and one female, in good to excellent condition, volu...

It is known that branching strands of cardiac tissue can form a substrate for very slow conduction. The branches slow conduction by acting as current loads drawing depolarizing current from the main strand ("pull" effect). It has been suggested that, upon depolarization of the branches, they become current sources reinjecting current back into the strand, thus enhancing propagation safety ("pus...