TY - JOUR
T1 - Physiological assessment of isolated running does not directly replicate running capacity after triathlon-specific cycling
AU - ETXEBARRIA, Naroa
AU - Hunt, Julie
AU - Ingham, Steve
AU - Ferguson, Richard A.
PY - 2014
Y1 - 2014
N2 - Triathlon running is affected by prior cycling and power output during triathlon cycling is variable in nature. We compared
constant and triathlon-specific variable power cycling and their effect on subsequent submaximal running physiology. Nine
well-trained male triathletes (age 24.6 ± 4.6 years, VO_ 2peak 4.5 ± 0.4 L · min-1
; mean ± SD) performed a submaximal
incremental run test, under three conditions: no prior exercise and after a 1 h cycling trial at 65% of maximal aerobic power
with either a constant or a variable power profile. The variable power protocol involved multiple 10–90 s intermittent efforts
at 40–140% maximal aerobic power. During cycling, pulmonary ventilation (22%, ±14%; mean; ±90% confidence limits),
blood lactate (179%, ±48%) and rating of perceived exertion (7.3%, ±10.2%) were all substantially higher during variable
than during constant power cycling. At the start of the run, blood lactate was 64%, ±61% higher after variable compared to
constant power cycling, which decreased running velocity at 4 mM lactate threshold by 0.6, ±0.9 km · h-1
. Physiological
responses to incremental running are negatively affected by prior cycling and, to a greater extent, by variable compared to
even-paced cycling. Testing and training of triathletes should account foe higher physiological cost of triathlon-specific
cycling and its effect on subsequent running.
AB - Triathlon running is affected by prior cycling and power output during triathlon cycling is variable in nature. We compared
constant and triathlon-specific variable power cycling and their effect on subsequent submaximal running physiology. Nine
well-trained male triathletes (age 24.6 ± 4.6 years, VO_ 2peak 4.5 ± 0.4 L · min-1
; mean ± SD) performed a submaximal
incremental run test, under three conditions: no prior exercise and after a 1 h cycling trial at 65% of maximal aerobic power
with either a constant or a variable power profile. The variable power protocol involved multiple 10–90 s intermittent efforts
at 40–140% maximal aerobic power. During cycling, pulmonary ventilation (22%, ±14%; mean; ±90% confidence limits),
blood lactate (179%, ±48%) and rating of perceived exertion (7.3%, ±10.2%) were all substantially higher during variable
than during constant power cycling. At the start of the run, blood lactate was 64%, ±61% higher after variable compared to
constant power cycling, which decreased running velocity at 4 mM lactate threshold by 0.6, ±0.9 km · h-1
. Physiological
responses to incremental running are negatively affected by prior cycling and, to a greater extent, by variable compared to
even-paced cycling. Testing and training of triathletes should account foe higher physiological cost of triathlon-specific
cycling and its effect on subsequent running.
KW - cycle-run
KW - stochastic cycling
KW - variable power
UR - http://www.scopus.com/inward/record.url?scp=84894318434&partnerID=8YFLogxK
UR - http://www.mendeley.com/research/physiological-assessment-isolated-running-not-directly-replicate-running-capacity-after-triathlonspe
U2 - 10.1080/02640414.2013.819520
DO - 10.1080/02640414.2013.819520
M3 - Article
SN - 0264-0414
VL - 32
SP - 229
EP - 238
JO - Journal of Sports Sciences
JF - Journal of Sports Sciences
IS - 3
ER -