TY - JOUR
T1 - The influence of blood lactate sample site on exercise prescription
AU - Moran, Paul
AU - Pritchard, Jonathan
AU - Ansley, Les
AU - Howatson, Glyn
PY - 2012/2
Y1 - 2012/2
N2 - The aims of this study were, firstly to determine the level of agreement between the fingertip and earlobe for the measurement of blood lactate, and secondly, to examine whether these sample sites may be used interchangeably when distinguishing lactate parameters routinely used in the physiological assessment and exercise prescription. Twenty healthy males performed an incremental cycle ergometry step test. Capillary blood samples were taken simultaneously at the end of each increment from the ear lobe and fingertip to determine blood lactate concentration. Power output and heart rate at different lactate parameters (LT, LT1, 2 mmol.L-1 and 4 mmol.L-1) were calculated from the lactate values. The average bias in blood lactate concentration measured from the fingertip and earlobe was 9.2% with 95% of measures differing by between -24.9 and 58.7%. There were no significant differences between sample sites (P = 0.201), however there was a strong positive relationship (R² = 0.9455). At the different lactate parameters there were no differences in determining heart rate (except at 4 mMol.L-1 (P = 0.028), equating to 2 bpm) and power output between sample sites. In conclusion, this high level of agreement and negligable differences in prescribing exercise using power output and heart rate from commonly used lactate parameters, determined from the ear lobe and fingertip indicate that these sample sites could be used interchangeably for physiological assessment during cycle ergometry.
AB - The aims of this study were, firstly to determine the level of agreement between the fingertip and earlobe for the measurement of blood lactate, and secondly, to examine whether these sample sites may be used interchangeably when distinguishing lactate parameters routinely used in the physiological assessment and exercise prescription. Twenty healthy males performed an incremental cycle ergometry step test. Capillary blood samples were taken simultaneously at the end of each increment from the ear lobe and fingertip to determine blood lactate concentration. Power output and heart rate at different lactate parameters (LT, LT1, 2 mmol.L-1 and 4 mmol.L-1) were calculated from the lactate values. The average bias in blood lactate concentration measured from the fingertip and earlobe was 9.2% with 95% of measures differing by between -24.9 and 58.7%. There were no significant differences between sample sites (P = 0.201), however there was a strong positive relationship (R² = 0.9455). At the different lactate parameters there were no differences in determining heart rate (except at 4 mMol.L-1 (P = 0.028), equating to 2 bpm) and power output between sample sites. In conclusion, this high level of agreement and negligable differences in prescribing exercise using power output and heart rate from commonly used lactate parameters, determined from the ear lobe and fingertip indicate that these sample sites could be used interchangeably for physiological assessment during cycle ergometry.
KW - cycle ergometry
KW - blood lactate
KW - physiological assessment
KW - agreement
KW - training prescription
U2 - 10.1519/JSC.0b013e318225f395
DO - 10.1519/JSC.0b013e318225f395
M3 - Article
VL - 26
SP - 563
EP - 567
JO - Journal of Strength and Conditioning Research
JF - Journal of Strength and Conditioning Research
SN - 1064-8011
IS - 2
ER -