Red blood cell variables in highly trained pubescent athletes: a comparative analysis

Boyadjiev, Nikolay; Taralov, Zdravko

doi:10.1136/bjsm.34.3.200

Cited by 40 publications

(32 citation statements)

References 11 publications

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“…To our knowledge, there are only two studies which compared parameters of red blood cell profile in adolescent athletes with age-matched controls and the results were inconsistent. Whilst Mayr et al (2006) did not observe significant differences in [Hb] and Hct between 14 and 18-year-old elite speed skaters and age-matched non-athletes [Hb] and Hct were shown to be significantly lower in *14-year-old highly trained athletes when compared with untrained individuals in a study of Boyadjiev and Taralov (2000).…”

Section: Longitudinal Observationmentioning

confidence: 71%

Total haemoglobin mass and red blood cell profile in endurance-trained and non-endurance-trained adolescent athletes

2011

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To evaluate differences in total haemoglobin mass (tHb mass) and in red blood cell profile between elite endurance-trained (END) and non-endurance-trained (nEND) male and female adolescent athletes, tHb mass (CO rebreathing) and specific variables of red blood cell profile (haemoglobin concentration, haematocrit, erythrocyte indices) were determined in 59 elite junior athletes (29 END, 30 nEND). We hypothesized that at the age of 15-17 years, regular endurance training might induce a significant increase in tHb mass and changes in red blood cell profile. Therefore, all parameters were again determined after 6, 12 and 18 months in a subset of 27 subjects (17 END, 10 nEND). In END, tHb mass related to body weight was ~15% greater than in nEND (11.2 ± 1.6 vs. 9.7 ± 1.3 g kg(-1), P < 0.001), whereas no significant differences were observed for the red blood cell profile. In both groups, tHb mass related to body weight and the variables of red blood cell profile had not changed significantly after 6, 12 and 18 months of regular training. In conclusion, in elite junior athletes, differences in tHb mass between END and nEND were similar, however, smaller compared with previously in adult athletes reported values. At the age of 15-17 years, 18 months of regular training did not induce significant changes in tHb mass beyond alterations explained by physical growth and also variables of red blood cell profile did not change significantly.

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Section: Longitudinal Observationmentioning

confidence: 71%

Total haemoglobin mass and red blood cell profile in endurance-trained and non-endurance-trained adolescent athletes

2011

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“…The influence of training and rapid growth at this age is further supported by examination of red blood cell count, packed cell volume and haemoglobin concentration in 876 intensely training athletes (age 14.01±0.06 years) compared with controls 102. All measured variables were reduced more in the athletic group versus controls, and the male athletes experienced the greatest reductions 102…”

Section: Improved Athletic Performance Timeframes In Young Athletesmentioning

confidence: 88%

Physiological responses to rock climbing in young climbers

2007

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Key questions regarding the training and physiological qualities required to produce an elite rock climber remain inadequately defined. Little research has been done on young climbers. The aim of this paper was to review literature on climbing alongside relevant literature characterising physiological adaptations in young athletes. Evidence-based recommendations were sought to inform the training of young climbers. Of 200 studies on climbing, 50 were selected as being appropriate to this review, and were interpreted alongside physiological studies highlighting specific common development growth variables in young climbers. Based on injury data, climbers younger than 16 years should not participate in international bouldering competitions and intensive finger strength training is not recommended. The majority of climbing foot injuries result from wearing too small or unnaturally shaped climbing shoes. Isometric and explosive strength improvements are strongly associated with the latter stages of sexual maturation and specific ontogenetic development, while improvement in motor abilities declines. Somatotyping that might identify common physical attributes in elite climbers of any age is incomplete. Accomplished adolescent climbers can now climb identical grades and compete against elite adult climbers aged up to and .40 years. High-intensity sports training requiring leanness in a youngster can result in altered and delayed pubertal and skeletal development, metabolic and neuroendocrine aberrations and trigger eating disorders. This should be sensitively and regularly monitored. Training should reflect efficacious exercises for a given sex and biological age.

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“…Additionally, 12 weeks of strength training did not change Hb, erythrocyte volume, plasma volume or total blood volume in older men [43]. A comparative analysis showed that HCT, Hb and RBC in highly trained pubescent athletes were decreased after continuous, high-intensity strength (or aerobic) training [44]. Finally, there is emerging recognition of considerable heterogeneity in the hematological response to exercise training, ranging from frank nonresponders to good responders, even in subjects with matched baseline characteristics.…”

Section: Effects Of Exercise Training On the Erythrocytic Systemmentioning

confidence: 99%

Effects of Exercise Training on Red Blood Cell Production: Implications for Anemia

Hu¹,

Wei²

2012

Acta Haematol

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Exercise training can increase total Hb and red cell mass, which enhances oxygen-carrying capacity. The possible underlying mechanisms are proposed to come mainly from bone marrow, including stimulated erythropoiesis with hyperplasia of the hematopoietic bone marrow, improvement of the hematopoietic microenvironment induced by exercise training, and hormone- and cytokine-accelerated erythropoiesis. Anemia is one of the most common medical conditions in chronic disease. The effects of exercise training on counteracting anemia have been explored and evaluated. The results of the research available to date are controversial, and it seems that significant methodological limitations exist. However, exercise training might be a promising, additional, safe and economical method to help improve anemia. There is a need for further investigation into the effects of and guidelines for exercise interventions (especially strength training) in this population of patients, particularly among cancer patients who are undergoing or have undergone chemotherapy or radiation treatments. As the available data are limited, additional research to uncover the underlying mechanisms associated with the effects of exercise training on anemia is clearly warranted.

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Red blood cell variables in highly trained pubescent athletes: a comparative analysis

Cited by 40 publications

References 11 publications

Total haemoglobin mass and red blood cell profile in endurance-trained and non-endurance-trained adolescent athletes

Total haemoglobin mass and red blood cell profile in endurance-trained and non-endurance-trained adolescent athletes

Physiological responses to rock climbing in young climbers

Effects of Exercise Training on Red Blood Cell Production: Implications for Anemia

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