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Dynapenia (pronounced dahy-nuh-pē-nē-a, Greek translation for poverty of strength, power, or force) is the loss of muscular strength not caused by neurological or muscular disease that typically is associated with older adults. [1] Dynapenia is the loss of muscle strength, rather than the loss of muscle mass . The preservation of muscular ...
The muscle cross-sectional area (blue line in figure 1, also known as anatomical cross-section area, or ACSA) does not accurately represent the number of muscle fibers in the muscle. A better estimate is provided by the total area of the cross-sections perpendicular to the muscle fibers (green lines in figure 1).
A wide variety of body composition measurement methods exist. The gold standard measurement technique for the 4-compartment model consists of a weight measurement, body density measurement using hydrostatic weighing or air displacement plethysmography, total body water calculation using isotope dilution analysis, and mineral content measurement by dual-energy X-ray absorptiometry (DEXA). [1]
During strength training, your muscles grow larger and stronger, adding myonuclei (control centers within individual muscle fibers that help regulate growth and repair), says Luke Carlson, CPT ...
Muscle strength is a result of three overlapping factors: physiological strength (muscle size, cross sectional area, available crossbridging, responses to training), neurological strength (how strong or weak is the signal that tells the muscle to contract), and mechanical strength (muscle's force angle on the lever, moment arm length, joint ...
There are various ways to measure physical strength of a person or population. Strength capability analysis is usually done in the field of ergonomics where a particular task (e.g., lifting a load, pushing a cart, etc.) and/or a posture is evaluated and compared to the capabilities of the section of the population that the task is intended towards.
Sarcopenic obesity is a combination of two disease states, sarcopenia and obesity.Sarcopenia is the muscle mass/strength/physical function loss associated with increased age, [1] and obesity is based off a weight to height ratio or body mass index (BMI) that is characterized by high body fat or being overweight.
Growth hormone increases muscle protein synthesis and increases muscle mass, but does not lead to gains in strength and function in most studies. [42] This, and the similar lack of efficacy of its effector insulin-like growth factor 1 (IGF-1), may be due to local resistance to IGF-1 in aging muscle, resulting from inflammation and other age ...