The effects of caffeine ingestion on time trial cycling performance

L. R. McNaughton; R. J. Lovell; J. Siegler; A. W. Midgley; L. Moore; D. J. Bentley

The effects of caffeine ingestion on time trial cycling performance

L. R. McNaughton, R. J. Lovell, J. Siegler, A. W. Midgley, L. Moore, D. J. Bentley

Research output: Contribution to journal › Article › peer-review

Abstract

Purpose: The purpose of this work was to determine the effects of caffeine on high intensity time trial (TT) cycling performance in well-trained subjects. Subjects: Six male cyclists with the following physical characteristics (mean Â± SD) age 30.7 Â± 12, height 179.3 Â± 7.5 cm, mass 70.0 Â± 7.5 kg, VO2max 65.0 Â± 6.3 mL•kg-1•min-1 undertook three 1-h TT performances, control (C), placebo (P) and caffeine (CAF), on a Velotron cycle ergometer conducted in a double-blind, random fashion. Sub-jects rested for 60 min and were then given CAF or P in a dose of 6 mg•kg-1 body mass and then commenced exercise after another 60 min of rest. Before ingestion, 60 min postingestion, and at the end of the TT, finger-prick blood samples were analyzed for lactate. Results: The cyclists rode significantly further in the CAF trial (28.0 Â± 1.3 km) than they did in the C (26.3 Â± 1.5 km, P < .01) or P (26.4 Â± 1.5 km, P < .02) trials. No differences were seen in heart rate data throughout the TT (P > .05). Blood lactate levels were significantly higher at the end of the trials than either at rest or postingestion (P < .0001), but there were no differences between the three trial groups. Conclusion: On the basis of the data, we concluded that performance was improved with the use of a caffeine supplement.

Original language	English
Pages (from-to)	157-163
Number of pages	7
Journal	International Journal of Sports Physiology and Performance
Volume	3
Issue number	2
Publication status	Published - 2008

Keywords

caffeine physiological effect
time trials

Cite this

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title = "The effects of caffeine ingestion on time trial cycling performance",

abstract = "Purpose: The purpose of this work was to determine the effects of caffeine on high intensity time trial (TT) cycling performance in well-trained subjects. Subjects: Six male cyclists with the following physical characteristics (mean {\^A}± SD) age 30.7 {\^A}± 12, height 179.3 {\^A}± 7.5 cm, mass 70.0 {\^A}± 7.5 kg, VO2max 65.0 {\^A}± 6.3 mL•kg-1•min-1 undertook three 1-h TT performances, control (C), placebo (P) and caffeine (CAF), on a Velotron cycle ergometer conducted in a double-blind, random fashion. Sub-jects rested for 60 min and were then given CAF or P in a dose of 6 mg•kg-1 body mass and then commenced exercise after another 60 min of rest. Before ingestion, 60 min postingestion, and at the end of the TT, finger-prick blood samples were analyzed for lactate. Results: The cyclists rode significantly further in the CAF trial (28.0 {\^A}± 1.3 km) than they did in the C (26.3 {\^A}± 1.5 km, P < .01) or P (26.4 {\^A}± 1.5 km, P < .02) trials. No differences were seen in heart rate data throughout the TT (P > .05). Blood lactate levels were significantly higher at the end of the trials than either at rest or postingestion (P < .0001), but there were no differences between the three trial groups. Conclusion: On the basis of the data, we concluded that performance was improved with the use of a caffeine supplement.",

keywords = "caffeine physiological effect, time trials",

author = "McNaughton, {L. R.} and Lovell, {R. J.} and J. Siegler and Midgley, {A. W.} and L. Moore and Bentley, {D. J.}",

year = "2008",

language = "English",

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T1 - The effects of caffeine ingestion on time trial cycling performance

AU - McNaughton, L. R.

AU - Lovell, R. J.

AU - Siegler, J.

AU - Midgley, A. W.

AU - Moore, L.

AU - Bentley, D. J.

PY - 2008

Y1 - 2008

N2 - Purpose: The purpose of this work was to determine the effects of caffeine on high intensity time trial (TT) cycling performance in well-trained subjects. Subjects: Six male cyclists with the following physical characteristics (mean Â± SD) age 30.7 Â± 12, height 179.3 Â± 7.5 cm, mass 70.0 Â± 7.5 kg, VO2max 65.0 Â± 6.3 mL•kg-1•min-1 undertook three 1-h TT performances, control (C), placebo (P) and caffeine (CAF), on a Velotron cycle ergometer conducted in a double-blind, random fashion. Sub-jects rested for 60 min and were then given CAF or P in a dose of 6 mg•kg-1 body mass and then commenced exercise after another 60 min of rest. Before ingestion, 60 min postingestion, and at the end of the TT, finger-prick blood samples were analyzed for lactate. Results: The cyclists rode significantly further in the CAF trial (28.0 Â± 1.3 km) than they did in the C (26.3 Â± 1.5 km, P < .01) or P (26.4 Â± 1.5 km, P < .02) trials. No differences were seen in heart rate data throughout the TT (P > .05). Blood lactate levels were significantly higher at the end of the trials than either at rest or postingestion (P < .0001), but there were no differences between the three trial groups. Conclusion: On the basis of the data, we concluded that performance was improved with the use of a caffeine supplement.

AB - Purpose: The purpose of this work was to determine the effects of caffeine on high intensity time trial (TT) cycling performance in well-trained subjects. Subjects: Six male cyclists with the following physical characteristics (mean Â± SD) age 30.7 Â± 12, height 179.3 Â± 7.5 cm, mass 70.0 Â± 7.5 kg, VO2max 65.0 Â± 6.3 mL•kg-1•min-1 undertook three 1-h TT performances, control (C), placebo (P) and caffeine (CAF), on a Velotron cycle ergometer conducted in a double-blind, random fashion. Sub-jects rested for 60 min and were then given CAF or P in a dose of 6 mg•kg-1 body mass and then commenced exercise after another 60 min of rest. Before ingestion, 60 min postingestion, and at the end of the TT, finger-prick blood samples were analyzed for lactate. Results: The cyclists rode significantly further in the CAF trial (28.0 Â± 1.3 km) than they did in the C (26.3 Â± 1.5 km, P < .01) or P (26.4 Â± 1.5 km, P < .02) trials. No differences were seen in heart rate data throughout the TT (P > .05). Blood lactate levels were significantly higher at the end of the trials than either at rest or postingestion (P < .0001), but there were no differences between the three trial groups. Conclusion: On the basis of the data, we concluded that performance was improved with the use of a caffeine supplement.

KW - caffeine physiological effect

KW - time trials

UR - http://handle.uws.edu.au:8081/1959.7/550008

M3 - Article

SN - 1555-0265

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SP - 157

EP - 163

JO - International Journal of Sports Physiology and Performance

JF - International Journal of Sports Physiology and Performance

IS - 2

ER -

The effects of caffeine ingestion on time trial cycling performance

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