In this issue, Wooten et al consider carbon dioxide expiration and respiratory buffering as two potential important factors for performance fatiguability. As hypothesized, both carbon dioxide expiration and respiratory buffering, measured via a cardiopulmonary exercise test, are good predictors of the changes that aerobic exercise training produces in performance fatiguability. In addition, Rogers-Bosh et al bring an interesting feasibility study to introduce High Intensity Interval Training (HIIT) in stroke survivors. In this study, the authors used treadmill HIIT, twice weekly in 17 adults with chronic stroke. They found that participants had a great attendance and that an exercise training program of such characteristics is feasible. Finally, Gurovich et al provide a novel methodology to measure carotid and brachial artery blood flow during exercise in vivo using vascular ultrasound. The methods they describe are important as most studies investigating exercise induced endothelial sheer stress (ESS) are done in vitro or using in vivo models that don't account for the normal pulsatile nature of blood flow. Their findings help add to our understanding of exercise induced ESS which forms the basis for some of the physiological benefits of exercise on vascular and endothelial function.
Alvaro Gurovich, PT, PhD, FACSM
Richard Severin, PT, DPT, CCS, PhD(s)
Guest Editors & Associate Editors of Basic & Applied Physiology Research