Howden, Reuben, Lightfoot, J. Timothy, Brown, Stephen J. and Swaine, Ian L. ORCID: 0000-0002-3747-1370 (2004) The effects of breathing 5% CO2 on human cardiovascular responses and tolerance to orthostatic stress. Experimental Physiology, 89 (4). pp. 465-471. ISSN 0958-0670 (Print), 1469-445X (Online) (doi:https://doi.org/10.1113/expphysiol.2004.027250)

Howden, Reuben, Lightfoot, J. Timothy, Brown, Stephen J. and Swaine, Ian L. ORCID: 0000-0002-3747-1370 (2002) The effects of isometric exercise training on resting blood pressure and orthostatic tolerance in humans. Experimental Physiology, 87 (4). pp. 507-515. ISSN 0958-0670 (Print), 1469-445X (Online) (doi:https://doi.org/10.1111/j.1469-445X.2002.tb00064.x)

Howden, Reuben, Tranfield, Philip A., Lightfoot, J. Timothy, Brown, Stephen J. and Swaine, Ian L. ORCID: 0000-0002-3747-1370 (2001) The reproducibility of tolerance to lower-body negative pressure and its quantification. European Journal of Applied Physiology, 84 (5). pp. 462-468. ISSN 1439-6319 (Print), 1439-6327 (Online) (doi:https://doi.org/10.1007/s004210100398)