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Sperlich, Billy
Publications (5 of 5) Show all publications
Zinner, C., Hauser, A., Born, D.-P., Wehrlin, J. P., Holmberg, H.-C. & Sperlich, B. (2015). Influence of Hypoxic Interval Training and Hyperoxic Recovery on Muscle Activation and Oxygenation in Connection with Double-Poling Exercise. PLoS ONE, 10(10), Article ID e0140616.
Open this publication in new window or tab >>Influence of Hypoxic Interval Training and Hyperoxic Recovery on Muscle Activation and Oxygenation in Connection with Double-Poling Exercise
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2015 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 10, no 10, article id e0140616Article in journal (Refereed) Published
Abstract [en]

Here, we evaluated the influence of breathing oxygen at different partial pressures during recovery from exercise on performance at sea-level and a simulated altitude of 1800 m, as reflected in activation of different upper body muscles, and oxygenation of the m. triceps brachii. Ten well-trained, male endurance athletes (25.3 +/- 4.1 yrs; 179.2 +/- 4.5 cm; 74.2 +/- 3.4 kg) performed four test trials, each involving three 3-min sessions on a double-poling ergometer with 3-min intervals of recovery. One trial was conducted entirely under normoxic (No) and another under hypoxic conditions (Ho; FiO2 = 0.165). In the third and fourth trials, the exercise was performed in normoxia and hypoxia, respectively, with hyperoxic recovery (HOX; FiO2 = 1.00) in both cases. Arterial hemoglobin saturation was higher under the two HOX conditions than without HOX (p<0.05). Integrated muscle electrical activity was not influenced by the oxygen content (best d = 0.51). Furthermore, the only difference in tissue saturation index measured via near-infrared spectroscopy observed was between the recovery periods during the NoNo and HoHOX interventions (P<0.05, d = 0.93). In the case of HoHo the athletes' P-mean declined from the first to the third interval (P < 0.05), whereas P-mean was unaltered under the HoHOX, NoHOX and NoNo conditions. We conclude that the less pronounced decline in P-mean during 3 x 3-min double-poling sprints in normoxia and hypoxia with hyperoxic recovery is not related to changes inmuscle activity or oxygenation. Moreover, we conclude that hyperoxia (FiO2 = 1.00) used in conjunction with hypoxic or normoxic work intervals may serve as an effective aid when inhaled during the subsequent recovery intervals.

National Category
Sport and Fitness Sciences
Identifiers
urn:nbn:se:miun:diva-26570 (URN)10.1371/journal.pone.0140616 (DOI)000363184600086 ()26468885 (PubMedID)2-s2.0-84949058109 (Scopus ID)
Available from: 2015-12-17 Created: 2015-12-17 Last updated: 2017-12-01Bibliographically approved
Born, D., Stöggl, T., Swarén, M., Sperlich, B. & Björklund, G. (2015). Is heart rate a valid measure to monitor exercise intensity during trail running in undulating terrain?. In: : . Paper presented at 20th Annual Congress of the European College of Sport Science, 2015, Malmö, Sweden..
Open this publication in new window or tab >>Is heart rate a valid measure to monitor exercise intensity during trail running in undulating terrain?
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2015 (English)Conference paper, Oral presentation with published abstract (Refereed)
National Category
Sport and Fitness Sciences
Identifiers
urn:nbn:se:miun:diva-25722 (URN)
Conference
20th Annual Congress of the European College of Sport Science, 2015, Malmö, Sweden.
Available from: 2015-08-25 Created: 2015-08-25 Last updated: 2015-10-12Bibliographically approved
Sperlich, B., Osman-Reinkens, S., Zinner, C., Krueger, M. & Holmberg, H.-C. (2014). Cardiorespiratory, metabolic and hormonal responses during open-wheel indoor kart racing. Journal of Sports Medicine and Physical Fitness, 54(4), 475-480
Open this publication in new window or tab >>Cardiorespiratory, metabolic and hormonal responses during open-wheel indoor kart racing
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2014 (English)In: Journal of Sports Medicine and Physical Fitness, ISSN 0022-4707, E-ISSN 1827-1928, Vol. 54, no 4, p. 475-480Article in journal (Refereed) Published
Abstract [en]

AIM: This study aimed to quantify the cardiorespiratory, metabolic and hormonal responses of elite open-wheel indoor kart racers.METHODS: Ten male racers (age: 21±3 yrs; height: 1.92±0.06 m, body mass: 76.0±5.9 kg) participated in a racing tournament. Their peak oxygen uptake and heart rate were assessed by a ramp test (100 W, increase 30 W·min-1) in the laboratory. During the racing itself, the cardio-respiratory and accelerometer values were recorded and pre- and post-race levels of blood lactate and salivary cortisol were determined.RESULTS: The average peak values for all of the drivers with respect to oxygen uptake and heart rate were 4.5±0.8 L·min-1 (56.7±7.9 mL·min-1·kg-1) and 193±5 beats·min-1, respectively. Overall, 28.3±3.3 laps were completed during 30-min of racing. Acceleration forces for the entire test averaged 1.20±0.51 G (maximum: 3.30 G), declining from the first 10 min until the end of racing (P<0.03). The oxygen uptake (~20 mL·min-1·kg-1), heart rate (~133 beats·min-1), respiratory exchange ratio (~0.96) and ventilation (~70 L·min-1) observed indicated moderate cardio-respiratory responses. Blood lactate concentration was significantly higher after the race than before but remained at <2 mmol·L-1 (P<0.01; effect size: 1.62).CONCLUSION: There were no differences between salivary cortisol levels before and after the race (P<0.06; effect size: 0.49). Directly after the race, the drivers rated their perceived exertion on Borg’s scale as 11.1±1.3. The present data revealed that the psycho-physical exertion associated with a 30-min open-wheel indoor kart race is moderate.

Keywords
Automobiles, Heart rate, Lactates, Oxygen consumption
National Category
Sport and Fitness Sciences Physiology
Identifiers
urn:nbn:se:miun:diva-23795 (URN)000343341800013 ()24721989 (PubMedID)2-s2.0-84922392292 (Scopus ID)
Available from: 2014-12-16 Created: 2014-12-16 Last updated: 2018-01-11Bibliographically approved
Zinner, C., Willis, S., Jonsson, M., Sperlich, B. & Holmberg, H.-C. (2014). Heart rate responses during biathlon races of different lengths in elite athletes. In: Erich Muller, Josef Kroll, Stefan Lindinger (Ed.), Science & Skiing VI: (pp. 483-494). Meyer & Meyer Sport
Open this publication in new window or tab >>Heart rate responses during biathlon races of different lengths in elite athletes
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2014 (English)In: Science & Skiing VI / [ed] Erich Muller, Josef Kroll, Stefan Lindinger, Meyer & Meyer Sport, 2014, p. 483-494Chapter in book (Refereed)
Place, publisher, year, edition, pages
Meyer & Meyer Sport, 2014
National Category
Sport and Fitness Sciences
Identifiers
urn:nbn:se:miun:diva-24015 (URN)9781782550662 (ISBN)
Available from: 2014-12-23 Created: 2014-12-23 Last updated: 2016-01-18Bibliographically approved
Born, D., Faiss, R., Willis, S., Strahler, J., Holmberg, H.-C., Millet, G. & Sperlich, B. (2014). Repeated Sprint Training By Elite Cross-Country Skiers Under Hypoxic Conditions Does Not Influence Their Mucosal Immune Function To A Greater Extent Than Identical Normoxic Training. In: Proceedings of the 19th Annual Congress of the ECSS: . Paper presented at 19th Annual Congress of the ECSS in Amsterdam, The netherlands (pp. 3).
Open this publication in new window or tab >>Repeated Sprint Training By Elite Cross-Country Skiers Under Hypoxic Conditions Does Not Influence Their Mucosal Immune Function To A Greater Extent Than Identical Normoxic Training
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2014 (English)In: Proceedings of the 19th Annual Congress of the ECSS, 2014, p. 3-Conference paper, Oral presentation with published abstract (Refereed)
National Category
Sport and Fitness Sciences
Identifiers
urn:nbn:se:miun:diva-23803 (URN)
Conference
19th Annual Congress of the ECSS in Amsterdam, The netherlands
Available from: 2014-12-16 Created: 2014-12-16 Last updated: 2015-03-16Bibliographically approved
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