@article{ref1,
title="Energy expenditure derived from micro-technology is not suitable for assessing internal load in collision-based activities",
journal="International journal of sports physiology and performance",
year="2016",
author="Highton, Jamie and Mullen, Thomas and Norris, Jonathan and Oxendale, Chelsea and Twist, Craig",
volume="12",
number="2",
pages="264-267",
abstract="This aim of this study was to examine the validity of energy expenditure derived from micro-technology when measured during a repeated effort rugby protocol. Sixteen male rugby players completed a repeated effort protocol comprising 3 sets of 6 collisions during which movement activity and energy expenditure (EEGPS) were measured using micro-technology. In addition, energy expenditure was also estimated from open circuit spirometry (EEVO2). Whilst related (r = 0.63, 90%CI 0.08-0.89), there was a systematic underestimation of energy expenditure during the protocol (-5.94 ± 0.67 kcal·min-1) for EEGPS (7.2 ± 1.0 kcal·min-1) compared to EEVO2 (13.2 ± 2.3 kcal·min-1). High-speed running distance (r = 0.50, 95%CI -0.66-0.84) was related to EEVO2, while Player Load was not (r = 0.37, 95%CI -0.81-0.68). Whilst metabolic power might provide a different measure of external load than other typically used micro-technology metrics (e.g. high-speed running, Player Load), it underestimates energy expenditure during intermittent team sports that involve collisions.<p /> <p>Language: en</p>",
language="en",
issn="1555-0265",
doi="10.1123/ijspp.2016-0069",
url="http://dx.doi.org/10.1123/ijspp.2016-0069"
}