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OBJECTIVES: Traditional jumping-dance rituals performed by Maasai men involve prolonged physical exertion that may contribute significantly to overall physical activity level. We aimed to objectively quantify the metabolic intensity of jumping-dance activity and assess associations with habitual physical activity and cardiorespiratory fitness (CRF). METHODS: Twenty Maasai men (18-37 years) from rural Tanzania volunteered to participate in the study. Habitual physical activity was monitored using combined heart rate (HR) and movement sensing over 3 days, and jumping-dance engagement was self-reported. A 1-h jumping-dance session resembling a traditional ritual was organized, during which participants' vertical acceleration and HR were monitored. An incremental, submaximal 8-min step test was performed to calibrate HR to physical activity energy expenditure (PAEE) and assess CRF. RESULTS: Mean (range) habitual PAEE was 60 (37-116) kJ day-1 kg-1 , and CRF was 43 (32-54) mL O2 min-1 kg-1 . The jumping-dance activity was performed at an absolute HR of 122 (83-169) beats·min-1 , and PAEE of 283 (84-484) J min-1 kg-1 or 42 (18-75)% when expressed relative to CRF. The total PAEE for the session was 17 (range 5-29) kJ kg-1 , ~28% of the daily total. Self-reported engagement in habitual jumping-dance frequency was 3.8 (1-7) sessions/week, with a total duration of 2.1 (0.5-6.0) h/session. CONCLUSIONS: Intensity during traditional jumping-dance activity was moderate, but on average sevenfold higher than habitual physical activity. These rituals are common, and can make a substantial contribution to overall physical activity in Maasai men, and thus be promoted as a culture-specific activity to increase energy expenditure and maintain good health in this population.

På opfordring af red. skrives Forord til den danske oversættelse af Thomas Fuchs: Hjernens økologi (KLIM)

Bidrag til en antologi om psykologisk tryghed, udg. af red. Peter Andersen og Karsten Mellon

bidrag til Kaspar Bonnéns bog: "The Past Will Never Leave You" (med udvalgte kunstneriske arbejder; bidraget forefindes også på dansk: "Tanker om rum")

https://www.raeson.dk/2023/steen-nepper-larsen-uddannelsesreformen-afsloerer-nutidens-socialdemokrater-som-baade-historie-og-hovedloese/

Bidrager til Henrik Dresbølls Det første skridt. 200 måder at få ting til at ske.Akademisk Forlag 2023, s. 69-72 + 178

Skriver på baggrund af en henvendelse fra red. Martin Blok Johansen (fra VIA) dette essay

In isolated mitochondria, calcium-induced mitochondrial permeability transition pore (mtPTP) opening is thought to be regulated by adenylates but the relative effects of inherent adenylate cycling unique to permeabilized tissues is less explored. To determine the effect of adenylate cycling on calcium retention capacity (CRC) as an index of mt-permeability transition (mtPT) in permeabilized muscle fibers, separate in vitro assessments of CRC were compared in media that did not contain ADP or received exogenous ADP that naturally equilibrated with ATP through endogenous ATP-dependent pathways (ADP/ATP cycling). Comparisons were made to ADP combined with a hexokinase 2-deoxyglucose system recycling ATP back to ADP (ATP depletion). In mouse quadriceps, ADP increased CRC suggesting endogenous ADP-ATP cycling attenuates mtPT. ADP with hexokinase lowered CRC relative to ADP alone but had no effect compared to the absence of ADP (no adenylates). This finding suggests ADP does not alter calcium-induced mtPT and that its regulation by adenylates is specific to ATP in permeabilized mouse quadriceps fibers. Accelerating matrix ADP/ATP cycling with creatine and 5 mM ADP did not affect CRC but more than doubled CRC (desensitized mtPT) when the hexokinase clamp was included. CRC was similar in wildtype and D2.mdx mouse cardiac left ventricle fibers whether assessed with ADP and creatine (adenylate cycling) or without ADP, confirming adenylate-dependent and -independent control of mtPT is not altered in this model of myopathy. These results demonstrate the natural cycling of ADP with ATP in permeabilized muscle fibers attenuates mtPT, but not due to ADP itself. Repeating assessments with and without adenylate cycling can add further insight to experimental results.

Digitalisering er et af de tre hovedmål i Danmarks Tekniske Universitets (DTU) strategi 2020-2025 og er derfor også et vigtigt fokusområde på DTU Kemiteknik (DTU KT).

Contribution til special issue: "Research Literacy in Education" of P & P, Spring 2023, ed. by Andreas Eriksen (Oslo-Met) et al.

Anmeldt i avisens bogtillæg

Skrevet på opfordring af red.

Bidrag til mindeskrift for Hans-Jørgen Schanz

supplementary material

Anmeldelse af Giorgio Agamben: Where Are We Now. The Epidemic as Politics (London: Eris 2021)

Many children either commute in and out of multiple households or have siblings who do so. They switch between home settings; some of them have to pack themselves and their history/ies into their luggage and move them across the country. They move between multiple households; from one set of home logics to another. They are parts of multi-local extended families and as participants in such multiple families and households share in the conditions of having to share. To a certain degree, they share their everyday lives, things, memories, places, and past and future experiences, but as the ones who move back and forth, they belong a little less to each place. They are “demanded” and “shared”. This paper focuses on children who share family and siblingship – limited to neither a single place nor family unit. Based on a phenomenological understanding, our research sheds light on how the children’s participation in different households places them in different “we-communities”, where sharing must be handled and practiced in an everyday manner. We also shed light on how “shared children” expose different patterns of commonality and divisional practices.