Network Magazine spring 2014 | Page 65

RESEARCH UPPER BODY ANAEROBIC EXERCISE A classic method for assessing anaerobic power and functional performance highlights the differences in energy contribution between the upper and lower body. Research paper: The contribution of energy systems during the upper body Wingate anaerobic test Research team: Dale Lovell PhD, Ava Kerr, Aaron Wiegand PhD, Colin Solomon PhD, Leonie Harvey & Chris McLellan PhD Published: Applied Physiology, Nutrition, and Metabolism, 2013, 38(2) Read more: nrcresearchpress.com/doi/abs/10.1139/ apnm-2012-0101#.U9XTlfmSyCi Introduction: One of the most commonly used methods of measuring anaerobic performance is the 30-s Wingate anaerobic test (WAnT), so-called because it was developed at the Wingate Academy in the 1970s. Most commonly performed on an ergometer, the WAnT has been shown to be a valid and reliable tool for the assessment of anaerobic power and functional performance of elite athletes and clinical populations. While a number of studies have characterised the contribution of the different energy systems during the WAnT for the lower body, little data exists on the contribution of the energy systems during an upper body WAnT. There are significant differences in neuromuscular and cardiovascular function between the upper and lower body at rest and during exercise. The upper body is reported to have a higher percentage of type II fibres and extract less oxygen during exercise compared to the lower body. Significant differences in peak and mean power have also been reported between the upper and lower body, even when normalised for active muscle mass. Therefore the contribution of the energy systems to Wingate performance during arm cranking may be different to the lower body during a cycle WAnT. Accordingly, this study measured the aerobic, anaerobic alactic and anaerobic lactic energy contribution during a WAnT for the upper body. In addition, correlations between energy contribution and active and total muscle mass were also assessed. (The lower body was also assessed for energy contribution and body composition, although this information is from unpublished data). Electro-magnetically braked cycle ergometer Methods: Fourteen physically active men volunteered to participate in the study. Each participant reported to the laboratory for 30 minutes on three separate occasions. On the initial visit participants underwent body composition analysis. Then on two separate visits in a random order participants completed an upper and lower body WAnT. The upper body WAnT was conducted on a modified electromagnetically braked cycle ergometer (EE) (Lode Excalibur Sport). The EE was fixed to a table, which in turn was fixed to the ground to prevent any movement in the EE during the WAnT (see photo). The lower body WAnT was conducted on a standard electronically braked cycle ergometer (Velotron, Racermate). Five minutes before, during and for 20 minutes after the WAnT, oxygen uptake (VO2) was measured continuously using open circuit spirometry. Blood lactate concentration was determined from capillary blood samples drawn from the finger at rest, immediately after and every second minute up to the 20th minute post-WAnT. The total energy cost of the WAnT NETWORK SPRING 2014 | 65