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Université de Fribourg

The influence of the gait-related arm swing on elevation gain measured by sport watches

Ammann, Rahel ; Taube, Wolfgang ; Neuhaus, Matthias ; Wyss, Thomas

In: Journal of Human Kinetics, 2016, vol. 50, no. 2, p. 53–60

The elevation gain is an important contributor to the total workload in endurance sports. The purpose of this study was to evaluate the influence of the arm swing on elevation gain in three sport watches (Garmin® Forerunner 910XT, Polar® RS800CX and Suunto® Ambit2) on a flat 400 m outdoor track. Altogether, a total of 120 repetitions of 1,200 m were performed at self-selected speeds...

Université de Fribourg

Intracortical inhibition in the soleus muscle is reduced during the control of upright standing in both young and old adults

Papegaaij, Selma ; Baudry, Stéphane ; Négyesi, János ; Taube, Wolfgang ; Hortobágyi, Tibor

In: European Journal of Applied Physiology, 2016, vol. 116, no. 5, p. 959–967

Purpose: In a previous study, we reported that a short-interval intracortical inhibition (SICI) decreases in old but not in young adults when standing on foam vs. a rigid surface. Here, we examined if such an age by task difficulty interaction in motor cortical excitability also occurs in easier standing tasks.Methods: Fourteen young (23 ± 2.7 years) and fourteen old (65 ± 4.1 years)...

Université de Fribourg

Accuracy of PARTwear inertial sensor and Optojump optical measurement system for measuring ground contact time during running

Rahel, Ammann ; Taube, Wolfgang ; Wyss, Thomas

In: Journal of Strength and Conditioning Research, 2016, p. -

The aim of this study was to validate the detection of ground contact time (GCT) during running in two differently working systems: a small inertial measurement sensor, PARTwear (PW), worn on the shoe laces, and the optical measurement system, Optojump (OJ), placed on the track. Twelve well-trained subjects performed 12 runs each on an indoor track at speeds ranging from 3.0 - 9.0 m[middle...

Université de Fribourg

Maximizing performance: augmented feedback, focus of attention, and/or reward?

Wälchli, Michael ; Ruffieux, Jan ; Bourquin, Yann ; Keller, Martin ; Taube, Wolfgang

In: Medicine & Science in Sports & Exercise, 2016, vol. 48, no. 4, p. 714–719

Different approaches like providing augmented feedback (aF), applying an external focus of attention (EF), or rewarding participants with money (RE) have been shown to instantly enhance motor performance. So far, these approaches have been tested either in separate studies or directly against each other. However, there is no study that combined aF, EF, and/or RE to test whether this provokes...

Université de Fribourg

Postural challenge affects motor cortical activity in young and old adults

Papegaaij, Selma ; Taube, Wolfgang ; Keeken, Helco G. van ; Otten, Egbert ; Baudry, Stéphane ; Hortobágyi, Tibor

In: Experimental Gerontology, 2016, vol. 73, p. 78–85

When humans voluntarily activate a muscle, intracortical inhibition decreases. Such a decrease also occurs in the presence of a postural challenge and more so with increasing age. Here, we examined age-related changes in motor cortical activity during postural and non-postural contractions with varying levels of postural challenge. Fourteen young (age 22) and twelve old adults (age 70) performed...

Université de Fribourg

Musculoskeletal injuries and training patterns in junior elite orienteering athletes

Roos, Lilian ; Taube, Wolfgang ; Zuest, Peter ; Clénin, German ; Wyss, Thomas

In: BioMed Research International, 2015, vol. 2015, p. e259531

Findings about the relation between musculoskeletal injuries and training patterns in orienteering athletes are sparse. Therefore, the musculoskeletal injuries and training patterns of 31 Swiss elite orienteering athletes aged 18-19 years were analyzed in a retrospective study. Individual training diaries and medical records were used to assess training data and injury history, respectively....

Université de Fribourg

Task-dependent changes of corticospinal excitability during observation and motor imagery of balance tasks

Mouthon, Audrey ; Ruffieux, Jean ; Wälchli, Michael ; Keller, Martin ; Taube, Wolfgang

In: Neuroscience, 2015, vol. 303, p. 535–543

Non-physical balance training has demonstrated to be efficient to improve postural control in young people. However, little is known about the potential to increase corticospinal excitability by mental simulation in lower leg muscles. Mental simulation of isolated, voluntary contractions of limb muscles increase corticospinal excitability but more automated tasks like walking seem to have no or...

Université de Fribourg

Neck muscle vibration can improve sensorimotor function in patients with neck pain

Beinert, Konstantin ; Keller, b , Martin ; Taube, Wolfgang

In: The Spine Journal, 2015, vol. 15, no. 3, p. 514–521

Background: context People with neck pain display a diminished joint position sense and disturbed postural control, which is thought to be a result of impaired somatosensory afferent activity and/or integration. Afferent processing can be artificially manipulated by vibration and was shown to reduce motor performance in healthy subjects. However, the effect of vibration on sensorimotor function...

Université de Fribourg

Enhanced jump performance when providing augmented feedback compared to an external or internal focus of attention

Keller, Martin ; Lauber, Benedikt ; Gottschalk, Marius ; Taube, Wolfgang

In: Journal of Sports Sciences, 2015, vol. 33, no. 10, p. 1067–1075

Factors such as an external focus of attention (EF) and augmented feedback (AF) have been shown to improve performance. However, the efficacy of providing AF to enhance motor performance has never been compared with the effects of an EF or an internal focus of attention (IF). Therefore, the aim of the present study was to identify which of the three conditions (AF, EF or IF) leads to the...

Université de Fribourg

Changes in corticospinal transmission following 8 weeks of ankle joint immobilization

Leukel, Christian ; Taube, Wolfgang ; Rittweger, Jörn ; Gollhofer, Albert ; Ducos, Michel ; Weber, Tobias ; Lundbye-Jensen, Jesper

In: Clinical Neurophysiology, 2015, vol. 126, no. 1, p. 131–139

Joint immobilization has previously been shown to modulate corticospinal excitability. The present study investigated changes in the excitability of distinct fractions of the corticospinal pathway by means of conditioning the H-reflex with transcranial magnetic stimulation (TMS) of the primary motor cortex (Hcond). This method allows assessment of transmission in fast (monosynaptic) and slow(er)...