Impact of Alterations in Total Hemoglobin Mass on V˙O2max

Schmidt, Walter; Prommer, Nicole

doi:10.1097/jes.0b013e3181d4957a

Cited by 189 publications

(169 citation statements)

References 25 publications

Supporting

Mentioning

145

Contrasting

Unclassified

Order By: Relevance

“…This is consistent with the higher VO 2peak relative to body mass. 27 Theoretically, this difference may be due to individual variations in training, heritage, and/or use of altitude training. The only differences in training we could identify were that the sprint skiers had higher volumes of speed training (P = .02) and strength training (P = .08).…”

Section: Discussionmentioning

confidence: 99%

Physiological Differences Between Sprint- and Distance-Specialized Cross-Country Skiers

Losnegard

Hallén²

2014

International Journal of Sports Physiology and Performance

View full text Add to dashboard Cite

This file was dowloaded from the institutional repository Brage NIH -brage.bibsys.no/nih Losnegard, T., Hallén, J. (2014). Physiological differences between sprintand distance-specialized cross-country skiers. Physiological Differences Between Sprintand Distance-Specialized Cross-Country Skiers Thomas Losnegard and Jostein HallénPurpose: Sprint-(≤1.8 km) and distance-skiing (≥15 km) performance rely heavily on aerobic capacity. However, in sprint skiing, due to the ~20% higher speed, anaerobic capacity contributes significantly. This study aimed to identify the possible anthropometric and physiological differences between elite male sprint and distance skiers. Methods: Six sprint and 7 distance international-level cross-country skiers completed testing using the V2 skating technique on a roller-ski treadmill. Measurements included submaximal O 2 cost (5°, 3 m/s) and a 1000-m time trial (6°, >3.25 m/s) to assess VO 2peak and accumulated oxygen (∑O 2 ) deficit. Results: The groups displayed similar O 2 cost during the submaximal load. The sprint skiers had a higher ∑O 2 deficit (79.0 ± 11.3 vs 65.7 ± 7.5 mL/kg, P = .03, ES = 1.27) and VO 2peak in absolute values (6.6 ± 0.5 vs 6.0 ± 0.5 L/ min, P = .04, ES =1.23), while VO 2peak relative to body mass was lower than in the distance skiers (76.4 ± 4.4 vs 83.0 ± 3.2 mL · kg -1 · min -1 , P = .009, ES = 1.59). The sprint skiers were heavier than the distance skiers (86.6 ± 6.1 vs 71.8 ± 7.2 kg, P = .002, ES = 2.07), taller (186 ± 5 vs 178 ± 7 cm, P = .04, ES = 1.25), and had a higher body-mass index (24.9 ± 0.8 vs 22.5 ± 1.3 kg/m 2 , P = .003, ES = 2.05). Conclusion: The elite male sprint skiers showed different anthropometric and physiological qualities than the distance skiers, with these differences being directly related to body mass.

show abstract

Section: Discussionmentioning

confidence: 99%

Physiological Differences Between Sprint- and Distance-Specialized Cross-Country Skiers

Losnegard

Hallén²

2014

International Journal of Sports Physiology and Performance

View full text Add to dashboard Cite

show abstract

“…Most previous studies centered on ‘sports anemia’ induced by endurance training. It is well documented in the literature that exercise training (mostly endurance training, but also strength training) can stimulate erythropoiesis and increase red cell mass as well as plasma volume, resulting in increased blood volume [for a review, see [4,5,6,7]]. This is evident in both women and men [8].…”

Section: Introductionmentioning

confidence: 97%

“…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. Erythropoiesis might be moderately influenced by exercise training and probably depends more on genetic predisposition [6]. …”

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

View full text Add to dashboard Cite

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.

show abstract

“…It was stated that exercise increases total hemoglobin mass by stimulating erythropoiesis, which augments the amount of O2 that can be carried by blood. It was reported that an increase in tHb by 1 g achieved e.g., by administration of erythropoietin, increased VO2, max by ∼3ml/min (Schmidt and Prommer, 2010). Thus, augmented tHb and tEV in trained athletes proves that exercise stimulates erythropoiesis.…”

Section: Discussionmentioning

confidence: 97%

Comparison of red blood profiles and oxygen transport capacity of elite and sub-elite wrestlers

Özal¹,

Cengiz

Yaman

et al. 2016

HumanSciences

View full text Add to dashboard Cite

This study aimed to compare the red blood profiles' that are determinants of oxygen transports system, of elite wrestlers with sub-elite wrestlers. This study consists of a twenty-one elite wrestlers representing national team of Turkey who volunteered to participate in the study. Biochemical parameters were determined during transition period and the bloods were drawn in a resting state for each participant. A paired T tests was used to check the variations in hematological parameters. There are no significant differences between the groups except age. Elite wrestlers age was found to be significantly higher than sub elite wrestlers (p = 0.019 <0.005). RBC, HGB, HCT, MCH, MCHC were within normal limits and also for athletes indicates a positive development and there were no significant differences between the groups. Training increases total hemoglobin mass by stimulating erythropoiesis, which increases the amount of O2 that can be carried by blood. regular screening of hematological variables is desirable as many athletes have values near or below the lower limit of the normal range.

show abstract

Impact of Alterations in Total Hemoglobin Mass on V˙O2max

Cited by 189 publications

References 25 publications

Physiological Differences Between Sprint- and Distance-Specialized Cross-Country Skiers

Physiological Differences Between Sprint- and Distance-Specialized Cross-Country Skiers

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

Comparison of red blood profiles and oxygen transport capacity of elite and sub-elite wrestlers

Contact Info

Product

Resources

About