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The German Journal of Sports Medicine is directed to translational science and clinical practice of Sports Medicine and its adjacent fields, which investigate the influence of physical activity, exercise, training and sports, as well as a lack of exercise affecting healthy people and patients of all age-groups. It addresses implications for prevention, diagnosis, therapy, rehabilitation and physical training as well as the entire Sports Medicine and research in sports science, physiology and biomechanics.

The Journal is the leading and most widely read German journal in the field of Sports Medicine. Readers are physicians, physiologists and sports scientists as well as physiotherapists, coaches, sport managers, and athletes. The journal offers to the scientific community online open access to its scientific content and online communication platform.

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Current Article

Issue 9/2017

The Efficiency of Performance - Der Wirkungsgrad von Training 

Böning D, Maassen N, Steinach M

Der Wirkungsgrad von Muskelarbeit

The efficiency η of energy conversion is defined astheratio between muscular power and metabolic energy expenditure. Following definitions are used: ηgross(muscular power/total energy expenditure), ηnet (muscular power/(total energy expenditure–resting energy expenditure)), ηwork (muscular power/(total energy expenditure–idling energy expenditure)), ηdelta (∆muscular power/∆energy expenditure). ηnet of isolated muscles amounts to 30%. Because of supporting functions, lower values result in vivo during positive exercise. During negative exercise the body often storesenergy (elastic, potential, kinetic) which markedly improves η if reused.
Measurements are performed using ergometers (cycle ergometers, treadmill etc.) and indirect calorimetry (VO2 and VCO2). Determination of both gases is essential, because varying proportions of fat and carbohydrate oxidation influence energy turnover. For intense exercise,the anaerobic energy yield is calculated from oxygen deficit or blood lactate. Measurements have to be standardized, because movement frequency and power influence η. For comparisons ηnetis preferable which little depends on power.
During sports, values vary between 1 (arching) and 50%(running). Measurement of energy expenditure per m distance and kg of body mass is also applicable for efficiency estimation. The efficiency of complex movements can be improved by practicing,sinceoptimized coordination reduces energy need. Aging and fatigue are therefore also influential. The mitochondrial function is probably not trainable. Clear sex differences have not been observed. An improvement of efficiency in hypoxia is improbable; a relative increase of carbohydrate metabolism reduces the need for oxygen. An increase of efficiency by nitrate consumption is under discussion.

>Read whole article in German language

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Obituary

Prof. Dr. Bodo-Knut Jüngst 26.01.1935 - 06.08.2017

Prof. Dr. Bodo-Knut Jüngst was one famous Sports Physicians in Germany. He died at the age of 82 on August 6, 2017.

 

> Full Obituary in German Language by Prof. H.-V. Ulmer

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MEDICA MEDICINE

& SPORTS CONFERENCE

The MEDICA MEDICINE & SPORTS CONFERENCE will take pace on 14th and 15th of November 2017 in Düsseldorf. Please find further information on MEDICA 

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10th Congress of EFSMA in Portugal

The Eiropean Congress of EFSMA (European Federation of Sports Medicine Associations) will be organized for the 10th time, and also the 20th anniversary of EFSMA will be celebrated on 16th to 18th of November 2017 in Cascais, Portugal in the Estoril Congress Center according to the motto „Feel our energy“.

Abstracts can be submitted until 7th of April. Please find further information on

www.efsma2017.org

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Obituary

 

Prof. Dr. med. habil. Dr. h. c. Kurt Tittel 19.07.1920 - 20.08.2016

Professor Kurt Tittel was one of the most famous Sports Physicians in East Germany. He died at the age of 96 on August 20.

 

> Full Obituary in German Language by Professor Wildor Hollmann

> Full Obituary in German Language by Professor Georg Neumann

 

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