A prediction equation for indirect assessment of anaerobic threshold in male distance runners

We examined the effects of training specificity on the lactate threshold (LT) and VO2peak. Sixteen male subjects completed VO2peak/LT protocols on the cycle ergometer (CE) and treadmill (TM) before and after a training program. The subjects were assigned to run training (N = 5), cycle training (N = 6), and control groups (N = 5). Subjects trained 4 day/week for 10 weeks at approximately 89% of pre-training VO2peak. Results indicated that run training increased VO2 at LT (VO2LT) within both the CE and TM protocols (17.9 to 22.5 ml/kg.min-1 for CE, 22.7 to 36.0 ml/kg.min-1 for TM, p less than 0.05) with the 58.5% increase in VO2LT for TM being greater than the 30.3% increase for CE (p less than 0.05). Cycle training resulted in a 38.7% increase in CE VO2LT (19.7 to 27.4 ml/kg.min-1, p less than 0.05) with no significant improvement in TM VO2LT (23.6 to 24.0 ml/kg.min-1). Similar increases in VO2peak were observed for CE and TM protocols for both cycle and run training groups (VO2peak increased by 11.9 to 20.7% in both CE and TM regardless of training mode). No changes were observed in the control group for any variable. The present data suggest that increases in LT resulting from training may be specific to the mode of exercise.

Section: Lactate Thresholdsupporting

confidence: 69%

Effects of Training Specificity on the Lactate Threshold and V̇O₂Peak

Pierce¹,

Weltman²,

Seip³

et al. 1990

“…It has been suggested that traditional approaches toward exercise prescription (i.e., percent maximal heart rate or heart rate reserve) may not discriminate relative intensity among subjects when the anaerobic or lactate threshold is used as a criterion measure (12,21). This situation has led to the suggestion that training intensity and/or race pace be based on the V02 or velocity associated with the LT or specific blood lactate concentrations (12,18,21,(27)(28)(29)(30)34). While laboratory assessment of oxygen consumption and running velocity is the criterion method, the impracticalities and expense of direct measurement of VU2 max for large numbers of subjects have led to the development of a number of field tests for the prediction of VU2 max (3,4,6,7,11,13,19,23,26).…”

Section: Discussionmentioning

confidence: 99%

“…However, laboratory determination of 'O2 max, LT, and fixed blood lactate concentrations is limited by the requirement of expensive, sophisticated laboratory equipment and trained laboratory personnel. While numerous field tests designed to predict VO2max have been developed (3-8, 11, 13, 19, 20, 23, 26), little information is available with respect to predicting LT and fixed blood lactate concentrations from a simple field test (28,30). Thus, the purpose of the present study was to examine the ability Introduction to predict lactate threshold and fixed blood lactate concentrations from a 3200-rn field test run in male runners.…”

mentioning

confidence: 99%

Prediction of Lactate Threshold and Fixed Blood Lactate Concentrations from 3200-m Running Performance in Male Runners

Weltman

Snead²,

Seip³

et al. 1987

To determine the effectiveness of a 3200-m time trial for predicting VO2 and running velocity at lactate threshold (LT), fixed blood lactate concentrations of 2.0, 2.5, and 4.0 mM, and peak, 42 male runners (means age = 31.1 +/- 8.3 years; means ht = 176.8 +/- 6.6 cm; means wt = 70.4 +/- 10.0 kg) completed a VO2 peak/LT test and a 3200-m time trial. The continuous treadmill protocol started at 0% grade 150 m/min and increased 10 m/min every 3 min until exhaustion. Velocity at LT, 2.0, 2.5, and 4.0 mM was determined from individual velocity blood lactate relationships, and VO2 values were determined from individual plots ov VO2 vs velocity. VO2 peak and velocity peak were chosen as the highest values observed. Oxygen uptake at LT, 2.0, 2.5, 4.0 mM, and peak was 52.51, 56.61, 58.31, 61.70, and 64.21 ml/kg.min-1, respectively, while the velocities associated with LT, 2.0, 2.5, 4.0 mM, and peak were 235.5, 251.5, 259.8, 273.5, and 285.5 m/min, respectively. During the 3200-m time trial (means time = 11.28 +/- 0.96 min), 400-m split times and cumulative times were recorded. Twenty-nine subjects were randomly assigned to a validation sample and the remaining subjects were used for cross-validation purposes. Regression analysis revealed that a 3200-m time trial was a good predictor of both VO2 (ml/kg.min-1) and velocity (m/min) at LT, 2.0, 2.5, 4.0 mM, and peak.

“…Velocities at LT, FBLC of 2.0, 2.5, 4.0 mM, and peak were 107.1, 129.7, 136.6, 155.1, and 163.2 rn/mm, respectively. Regression analysis in the validation group revealed that the 3200-rn FBLC estimation have used trained male runners as subjects (20,22,25). Thus, the purpose of the present study was to examine the usefulness of a 3200-rn field test run to predict the lactate threshold and fixed blood lactate concentrations in untrained females.…”

Section: Introductionmentioning

confidence: 98%

Prediction of Lactate Threshold and Fixed Blood Lactate Concentrations from 3200-m Time Trial Running Performance in Untrained Females*

Weltman¹,

Seip²,

Levine³

et al. 1989

The present study examined the effectiveness of a 3200-m time trial run for predicting VO2 and running velocity at lactate threshold (LT), and fixed blood lactate concentrations (FBLC) of 2.0, 2.5, and 4.0 mM and peak in untrained women. Thirty-nine female subjects completed a VO2peak/LT test a 3200-m time trial run. Twenty-eight subjects were randomly assigned to a validation sample and the remaining subjects were used for cross-validation purposes. In the validation sample, VO2 measurements at LT, FBLC of 2.0, 2.5, 4.0 mM, and peak were 22.5, 29.2, 31.2, 36.5, and 38.5 ml/kg.min-1, respectively. Velocities at LT, FBLC of 2.0, 2.5, 4.0 mM, and peak were 107.1, 129.7, 136.6, 155.1, and 163.2 m/min, respectively. Regression analysis in the validation group revealed that the 3200-m time trial was an accurate predictor of velocities at LT, FBLC of 2.0, 2.5, 4.0 mM, and peak with correlations of r = 0.70, r = 0.84, r = 0.85, r = 0.87, and r = 0.95, respectively, and standard errors of estimate ranging from +/- 9.5 m/min (for velocity peak) to +/- 13.7 m/min (velocity LT). Vor VO2 prediction, correlations ranged from r = 0.61 (3200-m time vs VO2 LT) to r = 0.77 (3200-m time vs VO2 peak) with the standard errors of estimate ranging from +/- 4.18 (VO2 2.0 mM) to +/- 4.87 ml/kg.min-1 (VO2 4.0 mM).(ABSTRACT TRUNCATED AT 250 WORDS)