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Acta Physiologica Hungarica
Authors:
Gabriella Gombos Császár
,
V. Bajsz
,
E. Sió
,
V. Steinhausz Tóth
,
B. Schmidt
,
L. Szekeres
, and
J. Kránicz

As a prevention, a physically active lifestyle including the performance of weight-bearing exercises is important to enhance and maintain bone mineral content. Fifty young women were selected for the study. Twenty-five women carried out a specific training directed by a physiotherapist in the training group (TG), while 25 women were walking for 60 minutes in the control group (CG). Total and bone-specific alkaline phosphatase (ALP and BALP) and C-terminal cross-linked telopeptide (CTX) levels were measured at the beginning and at the end of exercise. The most remarkable change was seen in CTX levels (TG −28.89%, p < 0.001; CG −52.54%, p < 0.001), and there was also a significant difference in the values of CTX between TG and CG (p = 0.012). Therefore, walking more significantly reduced the level of CTX than special exercise. The decrease of BALP in TG was considerable but not significant (TG −4.63%, p = 0.091), while BALP levels dropped significantly in CG (−7.65%, p = 0.011), and there was a non-significant difference between the two groups (p = 0.22). Regarding the ALP level, a significant reduction was detected in TG and CG (−6.84%, p < 0.001 vs. −4.57%, p < 0.001). This study reveals that the 60-minute, middle-intensity training and the brisk walking have an immediate effect on bone metabolic markers.

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Journal of Behavioral Addictions
Authors:
Anna-Chiara Schaub
,
Maximilian Meyer
,
Amos Tschopp
,
Aline Wagner
,
Undine E. Lang
,
Marc Walter
,
Flora Colledge
, and
André Schmidt

Abstract

Background

Exercise dependence (ED) is characterised by behavioural and psychological symptoms that resemble those of substance use disorders. However, it remains inconclusive whether ED is accompanied by similar brain alterations as seen in substance use disorders. Therefore, we investigated brain alterations in individuals with ED and inactive control participants.

Methods

In this cross-sectional neuroimaging investigation, 29 individuals with ED as assessed with the Exercise Dependence Scale (EDS) and 28 inactive control participants (max one hour exercising per week) underwent structural and functional resting-state magnetic resonance imaging (MRI). Group differences were explored using voxel-based morphometry and functional connectivity analyses. Analyses were restricted to the striatum, amygdala, and inferior frontal gyrus (IFG). Exploratory analyses tested whether relationships between brain structure and function were differently related to EDS subscales among groups.

Results

No structural differences were found between the two groups. However, right IFG and bilateral putamen volumes were differently related to the EDS subscales “time” and “tolerance”, respectively, between the two groups. Resting-state functional connectivity was increased from right IFG to right superior parietal lobule in individuals with ED compared to inactive control participants. Furthermore, functional connectivity of the angular gyrus to the left IFG and bilateral caudate showed divergent relationships to the EDS subscale “tolerance” among groups.

Discussion

The findings suggest that ED may be accompanied by alterations in cognition-related brain structures, but also functional changes that may drive compulsive habitual behaviour. Further prospective studies are needed to disentangle beneficial and detrimental brain effects of ED.

Open access