Publikationsdatenbank

Wiesinger, H. P.;Gressenbauer, C.;Kosters, A.;Scharinger, M.;Muller, E.. (2019). Device and method matter: A critical evaluation of eccentric hamstring muscle strength assessments. Scand J Med Sci Sports. ():.

Abstract

Equivocal findings exist on isokinetic and Nordic hamstring exercise testing of eccentric hamstring strength capacity. Here, we propose a critical comparison of the mechanical output of hamstring muscles as assessed with either a dynamometer (IKD) or a Nordic hamstring device (NHD). Twenty-five volunteers (26 +/- 3 years) took part in a counterbalanced repeated-measures protocol on both devices. Eccentric peak torque, work, angle of peak torque, bilateral strength ratios, and electromyography activity of the biceps femoris long head, semitendinosus and gastrocnemius muscles were assessed. There was a very poor correlation in eccentric peak torque between the devices (r < 0.58), with a systematic and proportional bias toward lower torque values on the IKD (~28%) and a high typical error (~19%) in IKD and NHD measurements comparison. Furthermore, participants performed a higher total eccentric work on IKD, reached peak torques at greater knee extension angles, and showed a greater side-to-side strength difference compared to the Nordic hamstring exercise. Gastrocnemius muscle activity was lower during the Nordic hamstring exercise. Reliability was low for work on NHD and for angle of peak torque and bilateral strength ratios on either device. We conclude that the evaluation of eccentric knee flexor strength depends on the testing conditions and even under standardized procedures, the IKD and NHD measure a different trait. Both tests have limitations in terms of assessing strength differences within an individual, and measurements of the angle of peak torque or side-to-side differences in eccentric knee flexor strength revealed low reliability and should be considered with caution.

Web

https://www.ncbi.nlm.nih.gov/pubmed/31593621

Buchecker, Michael;Müller, Erich;Birklbauer, Jürgen;Wiesinger, Hans-Peter;Stöggl, Thomas. (2019). Effects of walking with unstable footwear on pelvis-trunk coordination variability. . ():176-177.

Abstract

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Wiesinger, H. P.;Kösters, A;Müller, E;Seynnes, O. R.;Herfert, J;Hecht, S;Niebauer, J;Rieder, F.. (2019). Efficiacy of heavy slow resistance training in management of patellar tendinopathy: A single blinded randomized controlled trial. . ():.

Abstract

Introduction: Heavy slow resistance (HSR) training is currently regarded as the treatment of choice for the conservative treatment of patellar tendinopathy (Malliarias et al. 2013). However, the efficacy of this type of intervention in reducing pain and restoring tendon structure and function has never been assessed against a wait-and-see tendinopathic control group. In this prospective study, we compare the effects of HSR training in patients with patellar tendinopathy to the changes measured without intervention in equally affected controls. Methods: Patients with chronic (>3 months), untreated patellar tendinopathy were randomized to 3 months of wait-and-see (WaS; 29±5 yrs; male=12; female=1) or HSR (27±6 yrs; male=11; female=3). Pre- and post-intervention testing comprised evaluations of neovascularization, tendon degeneration (hypo-echoic area and/ or anterior-posterior thickening), pain (VAS), functional limitations (VISA-P), ultrasound-based determination of mechanical and material properties and MRI-based measurement of patellar tendon cross-sectional area in vivo. Results: At baseline, anthropometric and tendon parameters did not differ between groups. During the course of the study, mean HSR training compliance was 80%. Significant group x time interactions for the VISA-P (p=.005,

Bothe, K.;Hirschauer, F.;Wiesinger, H. P.;Edfelder, J. M.;Gruber, G.;Hödlmoser, K.;Birklbauer, J.. (2019). Gross motor adaptation benefits from sleep after training. Journal of sleep research. ():e12961.

Abstract

Sleep has been shown to facilitate the consolidation of newly acquired motor memories. However, the role of sleep in gross motor learning, especially in motor adaptation, is less clear. Thus, we investigated the effects of nocturnal sleep on the performance of a gross motor adaptation task, i.e. riding an inverse steering bicycle. Twenty-six male participants (M = 24.19, SD = 3.70 years) were randomly assigned to a PM-AM-PM (n = 13) or an AM-PM-AM (n = 13) group, i.e. they trained in the evening/morning and were re-tested the next morning/evening and the following evening/morning (PM-AM-PM/AM-PM-AM group) so that every participant spent one sleep as well as one wake interval between the three test sessions. Inverse cycling performance was assessed by speed (riding time) and accuracy (standard deviation of steering angle) measures. Behavioural results showed that in the PM-AM-PM group a night of sleep right after training stabilized performance (accuracy and speed) and was further improved over the subsequent wake interval. In the AM-PM-AM group, a significant performance deterioration after the initial wake interval was followed by the restoration of subjects' performance levels from right after training when a full night of sleep was granted. Regarding sleep, right hemispheric fast N2 sleep spindle activity was related to better stabilization of inverse cycling skills, thus possibly reflecting the ongoing process of updating the participants' mental model from "how to ride a bicycle" to "how to ride an inverse steering bicycle". Our results demonstrate that sleep facilitates the consolidation of gross motor adaptation, thus adding further insights to the role of sleep for tasks with real-life relevance.

Web

https://www.ncbi.nlm.nih.gov/pubmed/31868978

Bothe, K.;Hirschauer, F.;Wiesinger, H. P.;Edfelder, J.;Gruber, G.;Birklbauer, J.;Hödlmoser, K.. (2019). The impact of sleep on complex gross-motor adaptation in adolescents. Journal of sleep research. 28(4):e12797.

Abstract

Sleep has been shown to facilitate the consolidation of newly acquired motor memories in adults. However, the role of sleep in motor memory consolidation is less clear in children and adolescents, especially concerning real-life gross-motor skills. Therefore, we investigated the effects of sleep and wakefulness on a complex gross-motor adaptation task by using a bicycle with an inverse steering device. A total of 29 healthy adolescents aged between 11 and 14 years (five female) were either trained to ride an inverse steering bicycle (learning condition) or a stationary bicycle (control condition). Training took place in the morning (wake, n = 14) or in the evening (sleep, n = 15) followed by a 9-hr retention interval and a subsequent re-test session. Slalom cycling performance was assessed by speed (riding time) and accuracy (standard deviation of steering angle) measures. Behavioural results showed no evidence for sleep-dependent memory consolidation. However, overnight gains in accuracy were associated with an increase in left hemispheric N2 slow sleep spindle activity from control to learning night. Furthermore, decreases in REM and tonic REM duration were related to higher overnight improvements in accuracy. Regarding speed, an increase in REM and tonic REM duration was favourable for higher overnight gains in riding time. Thus, although not yet detectable on a behavioural level, sleep seemed to play a role in the acquisition of gross-motor skills. A promising direction for future research is to focus on the possibility of delayed performance gains in adolescent populations.

Web

https://www.ncbi.nlm.nih.gov/pubmed/30565337

Wiesinger, H. P.. (2019). Makroskopische Sehnenanpassung and mechanische Belastungen. Strukturelle Integrität und Funktion. . ():.

Abstract

Sorry no Abstract available!

Jonsson, M.;Welde, B.;Stöggl, T. L.. (2019). Biomechanical differences in double poling between sexes and level of performance during a classical cross-country skiing competition. Journal of Sports Science. ():1-9.

Abstract

Biomechanical differences in double poling (DP) between sex and performance level were investigated in female and male cross-country skiers during a classical race (10/15 km). Skiers were divided into faster and slower on basis of race performance: females faster (n=20), females slower (n=20), males faster (n=20), and males slower (n=20). Based on video analysis while DP in a flat section of the track, joint and pole angles at pole plant (PP) and pole-off, cycle characteristics and the use and coordination pattern of heel-raise (raise of heels from the ground to have a higher body position at PP) were analysed. Faster females and males had 4.3% and 7.8% higher DP velocity than their slower counterparts (both P<0.001). Faster males had 6.5% longer cycles than slower males (P<0.001). Faster skiers stopped heel-raise later than slower skiers (females: 2.0+/-3.4% vs. -1.0+/-3.5%, P<0.05; males: 3.9+/-2.4% vs. 0.8+/-3.2% of cycle time in relation to PP, P<0.001). At PP, faster skiers and male skiers had a smaller pole angle and greater ankle to hip and ankle to shoulder angle with respect to vertical, resulting in a more distinct forward body lean. However, the majority of the differences are likely due to higher DP velocity.

Web

https://www.ncbi.nlm.nih.gov/pubmed/30747038

Finkenzeller, Thomas;Würth, Sabine;Müller, Erich;Amesberger, Günter. (2019). Ageing‐related changes of cognitive performance and stress regulation in high functioning elderly individuals. Scandinavian Journal of Medicine & Science in Sports. ():.

Abstract

Sorry no Abstract available!

Amesberger, Günter;Finkenzeller, Thomas;Müller, Erich;Würth, Sabine. (2019). Ageing‐related changes of the relationship between the physical self‐concept and the physical fitness in elderly individuals. Scandinavian Journal of Medicine & Science in Sports. ():.

Abstract

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Dimitriou, M.;Ring-Dimitriou, S. (2019). Körper in der Postmoderne.. . ():.

Abstract

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Ring-Dimitriou, S.;Krustrup, P.;Coelho-E-Silva, M. J.;Mota, J.;Seabra, A.;Rego, C.;Mazur, A.;Vlachopapadopoulou, E. A.;Caroli, M.;Frelut, M. L.;Erhardt, E.;Forslund, A.;Boyland, E.;Weghuber, D.;Thivel, D.. (2019). Could sport be part of pediatric obesity prevention and treatment? Expert conclusions from the 28th European Childhood Obesity Group Congress. Journal of Sport and Health Science. ():1-3.

Abstract

Sorry no Abstract available!

Weghuber, D.;Boyland, E. ;Caroli, M. ;Erhardt, E. ;Felut, M. ;Forsland, A. ;Mazur, A.;Ring-Dimitriou, S. ;Vlachopapdopoulou, E. A. ;Thivel, D.. (2019). Childhood Obesity: The Need to Translate Research into Daily Practice: Announcing the Annals of Nutrition and Metabolism as the Official Journal of the European Childhood Obesity Group.. . (74):80-82.

Abstract

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Stöggl, Thomas Leonhard;Sperlich, Billy. (2019). Training intensity, volume and recovery distribution among elite and recreational endurance athletes. Front Physiol. 10():592.

Abstract

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Takeda, M.;Miyamoto, N.;Takaaki, E.;Ohtonen, O.;Lindinger, S;Linnamo, V.;Stöggl, T.. (2019). Classical cross-country skiing technique detection by high precision kinematic global navigation satellite system. . ():93.

Abstract

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Born, Dennis-Peter;Stöggl, Thomas;Petrov, Arpad;Burkhardt, David;Lüthy, Fabian;Romann, Michael. (2019). Analysis of Freestyle Swimming Sprint Start Performance After Maximal Strength or Vertical Jump Training in Competitive Female and Male Junior Swimmers. . ():.

Abstract

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Brunauer, Richard;Kremser, Wolfgang;Stöggl, Thomas. (2019). From Sensor Data to Coaching in Alpine Skiing–A Software Design to Facilitate Immediate Feedback in Sports. . ():86-95.

Abstract

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Martínez, A.;Brunauer, R.;Venek, V.;Snyder, C.;Jahnel, R.;Buchecker, M.;Thorwartl, C.;Stöggl, T.L.. (2019). Development and validation of a gyroscope-based turn detection algorithm for alpine skiing in the field. Frontiers in Sports and Active Living. 1():18.

Abstract

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Martinez, A.;Snyder, C.;Brunauer, R.;Buchecker, M.;Jahnel, R.;Stöggl, T.. (2019). Development of an automatic alpine skiing turn detection algorithm based on a simple sensor setup. . ():.

Abstract

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Miyamoto, N.;Takeda, M.;Stöggl, T.;Ohtonen, O.;Linnamo, V.;Morimo, T.;Hatakeyma, N.;Miura, R.;Miyamoto, A.;Hariyama, M.;Lindinger, S. (2019). Validation of wearable kinematic GNSS receiver for cross-country skiing. . ():94.

Abstract

Sorry no Abstract available!

Snyder, C.;Brunauer, R.;Jahnel, R.;Stöggl, T.. (2019). Ski Style Classification and Scoring Using a Simple Sensor and Algorithm System. . ():.

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Snyder, C.;Brunauer, R.;Martinéz, A.;Stöggl, T.. (2019). Ski Style Classification and Scoring Using a Simple Sensor and Algorithm System. . ():.

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Snyder, C.;Martinéz, A.;Stöggl, T.. (2019). Validation of a Simple Sensor and Algorithm System to Calculated Edging Angle During Alpine Skiing. . ():.

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Stöggl, T.. (2019). Altered demands in cross-country skiing. . ():.

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Stöggl, T.;Hertlein, M.. (2019). Isocalorics and enjoyment of modern endurance training modalities (HIT vs. SIT vs. Threshold vs. LIT) in fit and unfit. . ():.

Abstract

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Björklund, G.;Swaren, M.;Born, D. P.;Stöggl, T.. (2019). Biomechanical Adaptations and Performance Indicators in Short Trail Running. Front Physiol. 10():506.

Abstract

Our aims were to measure anthropometric and oxygen uptake ( V O2) variables in the laboratory, to measure kinetic and stride characteristics during a trail running time trial, and then analyse the data for correlations with trail running performance. Runners (13 men, 4 women: mean age: 29 +/- 5 years; stature: 179.5 +/- 0.8 cm; body mass: 69.1 +/- 7.4 kg) performed laboratory tests to determine V O2 max, running economy (RE), and anthropometric characteristics. On a separate day they performed an outdoor trail running time trial (two 3.5 km laps, total climb: 486 m) while we collected kinetic and time data. Comparing lap 2 with lap 1 (19:40 +/- 1:57 min vs. 21:08 +/- 2:09 min, P < 0.001), runners lost most time on the uphill sections and least on technical downhills (-2.5 +/- 9.1 s). Inter-individual performance varied most for the downhills (CV > 25%) and least on flat terrain (CV < 10%). Overall stride cycle and ground contact time (GCT) were shorter in downhill than uphill sections (0.64 +/- 0.03 vs. 0.84 +/- 0.09 s; 0.26 +/- 0.03 vs. 0.46 +/- 0.90 s, both P < 0.001). Force impulse was greatest on uphill (248 +/- 46 vs. 175 +/- 24 Ns, P < 0.001) and related to GCT (r = 0.904, P < 0.001). Peak force was greater during downhill than during uphill running (1106 +/- 135 vs. 959 +/- 104 N, P < 0.01). Performance was related to absolute and relative V O2 max (P < 0.01), vertical uphill treadmill speed (P < 0.001) and fat percent (P < 0.01). Running uphill involved the greatest impulse per step due to longer GCT while downhill running generated the highest peak forces. V O2 max, vertical running speed and fat percent are important predictors for trail running performance. Performance between runners varied the most on downhills throughout the course, while pacing resembled a reversed J pattern. Future studies should focus on longer competition distances to verify these findings and with application of measures of 3D kinematics.

Web

https://www.ncbi.nlm.nih.gov/pubmed/31114511;https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6503082/pdf/fphys-10-00506.pdf