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The muscles of respiration are the muscles that contribute to inhalation and exhalation, by aiding in the expansion and contraction of the thoracic cavity. The diaphragm and, to a lesser extent, the intercostal muscles drive respiration during quiet breathing .
Abdominal muscles have many important functions, including breathing, coughing, and sneezing, and maintaining posture and speech in a number of species. [4] Other abdominal functions are that it helps "in the function of support, containment of viscera, and help in the process of expiration, defecation, urination, vomiting, and also at the time of childbirth."
Breathing is normally an unconscious, involuntary, automatic process. The pattern of motor stimuli during breathing can be divided into an inhalation stage and an exhalation stage. Inhalation shows a sudden, ramped increase in motor discharge to the respiratory muscles (and the pharyngeal constrictor muscles). [5]
Kipping pull-ups have lower muscle activation in the upper body but greater activation in the lower body and core; it is possible to perform them faster and complete more repetitions before encountering upper-body fatigue. [14] Kipping pull-ups are considered high risk for injury and are a major cause of shoulder injury in CrossFit athletes. [15]
Inhalation of air, as part of the cycle of breathing, is a vital process for all human life. The process is autonomic (though there are exceptions in some disease states) and does not need conscious control or effort. However, breathing can be consciously controlled or interrupted (within limits).
Achieving the level of excellent pull-up performance means your back, biceps, forearms, and core are all firing on all cylinders. So, if you can hit 15+ pull-ups, you’ve earned the "excellent ...
Exercises focusing on the legs and abdomen such as squats, lunges, and step ups are recommended to increase leg and core strength, in doing so, reduce the risk of falling. [9] Bodyweight exercises provide multi-directional movement that mimics daily activities, and as such can be preferable to using weight machines.
Olson shares that “negative pull-ups” are also a great starting point. “Use a chair or bench. Hang from a pull-up bar in the flexed (ending/up) position,” she explains of the exercise.