TY - JOUR
T1 - Relative match intensities at high altitude in highly-trained young soccer players (ISA3600)
AU - Buchheit, Martin
AU - Hammond, Kristal
AU - Bourdon, Pitre C.
AU - Simpson, Ben M.
AU - GARVICAN, Laura
AU - Schmidt, Walter F.
AU - Gore, Christopher
AU - Aughey, R
PY - 2015
Y1 - 2015
N2 - To compare relative match intensities of sea-level versus high-altitude native soccer players during a 2-week camp at 3600 m, data from 7 sea-level (Australian U17 National team, AUS) and 6 high-altitude (a Bolivian U18 team, BOL) native soccer players were analysed. Two matches were played at sea-level and three at 3600 m on Days 1, 6 and 13. The Yo-Yo Intermittent recovery test (vYo-YoIR1) was performed at sea-level, and on Days 3 and 10. Match activity profiles were measured via 10-Hz GPS. Distance covered >14.4 km.h-1 (D>14.4 km?h-1) and >80% of vYo-YoIR1 (D>80%vYo-YoIR1) were examined. Upon arrival at altitude, there was a greater decrement in vYo-YoIR1 (Cohen?s d +1.0, 90%CL ? 0.8) and D>14.4 km?h-1 (+0.5 ? 0.8) in AUS. D>14.4 km.h-1was similarly reduced relative to vYo-YoIR1 in both groups, so that D>80%vYo-YoIR1 remained similarly unchanged (-0.1 ? 0.8). Throughout the altitude sojourn, vYo-YoIR1 and D>14.4 km?h-1 increased in parallel in AUS, so that D>80%vYo-YoIR1 remained stable in AUS (+6.0%/match, 90%CL ? 6.7); conversely D>80%vYo-YoIR1 decreased largely in BOL (-12.2%/match ? 6.2). In sea-level natives competing at high-altitude, changes in match running performance likely follow those in high-intensity running performance. Bolivian data confirm that increases in `fitness? do not necessarily translate into greater match running performance, but rather in reduced relative exercise intensity.
AB - To compare relative match intensities of sea-level versus high-altitude native soccer players during a 2-week camp at 3600 m, data from 7 sea-level (Australian U17 National team, AUS) and 6 high-altitude (a Bolivian U18 team, BOL) native soccer players were analysed. Two matches were played at sea-level and three at 3600 m on Days 1, 6 and 13. The Yo-Yo Intermittent recovery test (vYo-YoIR1) was performed at sea-level, and on Days 3 and 10. Match activity profiles were measured via 10-Hz GPS. Distance covered >14.4 km.h-1 (D>14.4 km?h-1) and >80% of vYo-YoIR1 (D>80%vYo-YoIR1) were examined. Upon arrival at altitude, there was a greater decrement in vYo-YoIR1 (Cohen?s d +1.0, 90%CL ? 0.8) and D>14.4 km?h-1 (+0.5 ? 0.8) in AUS. D>14.4 km.h-1was similarly reduced relative to vYo-YoIR1 in both groups, so that D>80%vYo-YoIR1 remained similarly unchanged (-0.1 ? 0.8). Throughout the altitude sojourn, vYo-YoIR1 and D>14.4 km?h-1 increased in parallel in AUS, so that D>80%vYo-YoIR1 remained stable in AUS (+6.0%/match, 90%CL ? 6.7); conversely D>80%vYo-YoIR1 decreased largely in BOL (-12.2%/match ? 6.2). In sea-level natives competing at high-altitude, changes in match running performance likely follow those in high-intensity running performance. Bolivian data confirm that increases in `fitness? do not necessarily translate into greater match running performance, but rather in reduced relative exercise intensity.
KW - Association football
KW - Hypoxia
KW - Match running performance
UR - http://www.scopus.com/inward/record.url?scp=84921797751&partnerID=8YFLogxK
M3 - Article
SN - 1303-2968
VL - 14
SP - 98
EP - 102
JO - Journal of Sports Science and Medicine
JF - Journal of Sports Science and Medicine
IS - 1
ER -