The level of physical activity and the growth hormone (GH) response to acute physical exercise

Abstract

There is no clear evidence about the influence of programmed physical activity (training) on growth hormone (GH) response to acute physical exercise. The aim of this study was to estimate the relationship between the level of physical activity and the serum growth hormone concentration in response to acute physical exercise. The study was performed on 20, healthy male subjects. Based on the level of their physical activities they were divided in two groups of equal size: group 1, trained, and group 2, untrained subjects. All subjects performed one boot of exercise on cycle ergometer, lasting 30 minutes. Work intensity was approx. 65% of VO2 max, and the rate of cycling was 60/min. Serum GH concentrations were measured by IRMA (immunoradiometric assays) method in blood samples obtained in the period of rest, during exercise and in the recovery period. There were marked differences in the dynamics of changes in the serum GH concentrations during exercise period between the groups of various level of physical activity despite the lack of the significant differences in basal level and maximal level of serum GH concentration at the end of exercise. Untrained subjects showed faster increase in serum GH concentration than trained subjects, but in trained subjects the restoration of the basal values in the recovery period was faster. These results indicate that the level of physical activities in young, healthy male subjects has no influence on GH response to acute physical exercise.

Association between physical activity and sleep quality among healthcare students

“…Each PSQI component score represented an individual categorical variable ranging from 0 to 3. Global PSQI scores were grouped into "good SQ" (0-5) and "poor SQ" (6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21). IPAQ-SF data generated scores of "low", "moderate", or "high" PA (18).…”

“…Furthermore, brain-derived neurotrophic factor release increases after exercise, and it enhances “memory processing during sleep” ( 4 , 5 ). Lastly, the most “potent physiologic stimulus” for growth hormone secretion is PA ( 6 ). Growth hormone secretion is associated with slow-wave sleep also known as deep sleep, thus illustrating another link between PA and SQ ( 7 ).…”

Associations between match participation, maturation, physical fitness, and hormonal levels in elite male soccer player U15: a prospective study with observational cohort

“…These improvements can also be related with hormonal changes that occur during growth, mainly associated with the actions of growth hormone (GH) and insulin-like growth factor (IGF1) which may be regulated by training stimuli [ 19 ]. The GH-IGF1 axis is responsible for the anabolic environment that results in a normal and healthy growth of children [ 20 ].…”

Maturational effect on physical capacities and anabolic hormones in under-16 elite footballers: a cross-sectional study

“…As football sessions and other training stimuli may influence the concentration levels of GH and IGF1 during adolescence, and knowing that chronic training load exposure may elicit increased GH concentrations [22,25], it is hypothesized that players with more PT may present greater physical and physiological levels than players with lesser PT. Given the fact that male athletes advanced in maturity levels possess greater strength capabilities, it is expected that they present greater jump performance.…”