Enhanced physiological tremor deteriorates plantar flexor torque steadiness after bed rest

This study evaluated the effectiveness of resistance training to preserve submaximal plantar flexor (PF) torque steadiness following 60 days of bed rest (BR). Twenty-two healthy male subjects underwent either BR only (CTR, n=8), or BR plus resistance training (RT, n=14). The magnitude of torque fluctuations during steady submaximal isometric PF contractions (20%, 40%, 60% and 80% of maximum) were assessed before and after BR. Across contraction intensities, torque fluctuations (coefficient of variation, CV) increased more (P<0.05) after BR for CTR (from 0.31±0.10 to 0.92±0.63; P<0.001), than for RT (from 0.30±0.09 to 0.54±0.27; P<0.01). A shift in the spectral content of torque fluctuations towards increased rhythmic activity between 6.5 and 20Hz was observed in CTR only (P<0.05). H-reflex amplitude (H(max)/M(max) ratio) declined across groups from 0.57±0.18 before BR to 0.44±0.14 following BR (P<0.01) without correlation to CV. The present study showed that increased torque fluctuation after BR resulted from enhanced physiological tremor. Resistance training prevented the spectral shift in isometric PF torque fluctuation and offset ∼50% of the decline in performance associated with long-term BR.

Antisubjectivism and the (spectral) return of consciousness in landscape research

This paper analyses the changing conceptions of consciousness within landscape research over a critical period from the late 20th century to the present. The 1980s and 1990s mark a radical shift in the framing of consciousness away from psychological, perceptual, or experiential perspectives towards an ontology of consciousness as signifier, cultural artifact, and ideology. In cultural geography and the visual arts, these reframings can be characterised as anti subjectivist in that they do not attempt to problematize human consciousness so much as deactivate it and disqualify it from discussion. I draw out the theoretical and critical foundations of these antisubjectivist approaches as well as the subsequent opening out of the notion of landscape in more recent discussion. This ‘opening out’ implicates a more complex reengagement with minds, bodies, and landscapes and with the contested distinctions between subject and object. At the same time however, consciousness is seldom formulated explicitly within the literature and hence consciousness often occupies a spectral presence in the landscape of landscape research. I use one of my own paintings, Dalek in Landscape, to presage the discussion and attempt to highlight the tensions between these ideological, cultural and biological dimensions of consciousness at play within the landscape idea. Given the broader adoption of these anti-subjectivist developments within the academy, the example of landscape serves as a potentially useful case study for thinking upon the changing conceptions of consciousness in cognate creative and academic disciplines.