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The aim of this study was to compare the effects of vibration (Vib versus noVib) during a maximal graded cycling exercise on hormonal response, precisely on cortisol (C) and testosterone (T). Twelve active males (25 ± 5yrs; 181 ± 5cm; 80.7 ± 11.1kg) randomly performed two maximal incremental cycling tests on two separate days and at the same time of the day (09:00). The protocol consisted of incremental steps of 3 min duration performed on a PowerBIKETM that induces vibration cycling. The study was a repeated measures design and participants performed the test with and without vibration. Gas exchange and heart rate (HR) were continuously assessed and blood lactate (Bla) was recorded at the end of each incremental stage. Saliva samples were collected before and immediately after the test, and analysed for (C) and (T). The results show that C and T increased in both cycling conditions; however, the C's magnitude of change was significantly higher by 83% after Vib cycling in comparison to the no Vib (p = 0.014), whereas the T's magnitude of change were not statistically different between trials (p = 0.715). Vibration induced a decrease of the T/C ratio (p = 0.046) but no significant changes were observed following noVib (p = 0.476). As a conclusion, the investigation suggests that adding mechanical vibration to cycling may potentiate a catabolic exercise-induced state, which could have potential clinical implications in rehabilitation and injury treatment. Sport experts should take this message home to carefully plan the recovery process and time during training and competitions. [ABSTRACT FROM AUTHOR]

Background/aim: Currently, the equipment and techniques available to assess brain function during dynamic exercise are limited, which has restricted our knowledge of how the brain regulates exercise. This study assessed the brain areas activated during cycling by making use of a novel cycle ergometer, constructed to measure functional MRI (fMRI) brain images during dynamic exercise. Furthermore, we compared brain activation at different levels of ratings of perceived exertion (RPE) generated during the exercise.Methods: Seven healthy adults performed cycling exercise in a novel MRI compatible cycle ergometer while undergoing brain  fMRI. Participants completed a cycling block protocol comprising six trials of 2 min cycling with 16-s intervals between trials. Participants reported their RPE every minute through an audio link. The MRI cycling ergometer transferred the torque generated on the ergometer through a cardan system to a cycling ergometer positioned outside the MRI room. For data analysis, the effects of cycling as opposed to rest periods were examined after motion correction.Results: The multiparticipant analysis revealed in particular the activation of the cerebellar vermis and precentral and postcentral gyrus when periods of cycling versus rest were compared. Single participant analysis in four participants revealed that activation of the posterior cingulate gyrus and precuneus occurred in cycling blocks perceived as 'hard' compared with exercise blocks that were less demanding.Conclusions: The present study offers a new approach to assess brain activation during dynamic cycling exercise, and suggests that specific brain areas could be involved in the sensations generating the rating of perceived exertion. [ABSTRACT FROM AUTHOR]

Background: Research regarding the Nintendo Wii™ has focused on rehabilitation and balance benefits as well as energy expenditure for games such as boxing and tennis. There is a gap, however, in the literature regarding perceived exertion of the Wii™ compared to other modes of exercise. Research question: The purpose of this laboratory-based study was to compare perceived exertion on the Nintendo Wii™ and two traditional modes of exercise: the treadmill and cycle ergometer. It was expected that the Wii™ would show lower ratings of perceived exertion (RPE) values. Type of study: A repeated measures design was used. Methods: Five healthy males (average age = 21.4 years) and seven females (average age = 22.1 years) completed three 20 minute exercise sessions in random order, one each using the cycle ergometer, the treadmill and the Nintendo Wii Fit Plus™. Exercise intensity was fixed at 65% (± 5 bpm) of each participant's age predicted maximum heart rate. Ratings of perceived exertion and HR were measured every minute. Additionally overall RPE was collected at the end of each trial. Results: Repeated measures analysis of variance confirmed that although exercise intensity was consistent across the three exercise methods, overall RPE was lowest for the Nintendo Wii™ (9.50) followed by the treadmill (9.92) and finally the cycle ergometer (11.08), F(1,11) = 10.17, p<0.01. Conclusions: When compared to certain traditional exercise modalities the Nintendo Wii Fit Plus™ was perceived to require less effort. Therefore, using the Nintendo Wii Fit Plus™ is likely to result in higher exercise adherence rates. [ABSTRACT FROM AUTHOR]