Predicting Maximal Lactate Steady State from Carminatti’s Shuttle Run Test in Soccer Players

Abstract

The objective of the present study was to determine the validity of Carminatti’s shuttle run incremental test–T-Car derived parameters in estimating the maximal lactate steady state determined in shuttle run format. Eighteen soccer players performed a T-Car test, and several trials to determine the maximal lactate steady state. From T-Car were derived the heart rate deflection point, peak speed, maximal heart rate and parameters resulting from percentage of peak measures. The validity was accessed by Bland-Altman plots, linear regressions, and two one-sided tests of equivalence analysis. The results showed the speed at 80.4% of T-Car peak speed, the heart rate deflection point and the 91.4% of maximal heart rate were equivalent to maximal lactate steady state (Mean difference; ±90% compatibility interval; −0.8; ±1.5%, −0.4; ±1.1%, and 0.0; ±2.7%, respectively). Additionally, peak speed during the T-Car test was a stronger predictor of maximal lactate steady state (MLSS [km/h]=2.57+0.65 × sPeak; r=0.82 [90% CI; 0.62–0.92], standard error of the estimate=3.6%; 90% CI ×/÷1.4). Therefore, soccer players can use the T-Car derived parameters as a noninvasive and practical alternative to estimate the specific maximal lactate steady state for soccer.

Agreement Between Maximal Lactate Steady State and Critical Power in Different Sports: A Systematic Review and Bayesian’s Meta-Regression

“…We used the region of practical equivalence (ROPE) procedure to do inferences over the results (82). As previously preregistered, ROPE for mean difference effect size (pROPEm) was set as 63% (29,62,73), and ROPE for SD of the differences effect sizes (pROPEs) was set as 0.9 and 1.1 (55,67). The proportion of the posterior distribution located below, inside, and above the ROPE was calculated, showing it as a percentage; in this case, the percentages should be interpreted as the probability that the parameter will be in the 3 regions of the ROPE (P ,ROPE , P |ROPE| , and P .ROPE , respectively).…”

Assessing anaerobic speed reserve: A systematic review on the validity and reliability of methods to determine maximal aerobic speed and maximal sprinting speed in running-based sports

“…Of the 94 articles initially identified, 59 fulfilled all the criteria for inclusion in the analysis. Of the 29 articles reporting MAS, 23 referred to validity only [6,7,10,12,[32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50], five articles to both validity and reliability [13,14,[51][52][53], and one to reliability only [54]. Regarding MSS, 30 studies were included from which 12 studies reported only validity [15,19,[55][56][57][58][59][60][61][62][63][64], two only reliability [17,65] and 16 both reliability and validity [18,[66][67][68][69][70]…”

“…The validity of methods to assess MAS was reported in 28 studies using 69 different methods. For 23 studies the methodological quality for validity was rated very good [6,7,13,14,33,[36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53] and for five studies doubtful [10,12,32,34,35]. Intraday (one method) and interday reliability (six methods) of MAS was reported in one and five studies, respectively.…”

The Effects of a Supramaximal Intermittent Training Program on Aerobic and Anaerobic Running Measures in Junior Male Soccer Players

“…The peak running speed reached at the end of the T-CAR (PST-CAR) is well related to VO2max and MAS (Da Silva et al, 2011;Teixeira et al, 2014), the maximal lactate steady state (Carminatti et al, 2021), and repeated sprint ability (Da Silva et al, 2011) in soccer players. In addition, PST-CAR has been significantly associated with the distance covered at high-intensity activities during friendly matches (11 vs. 11) and medium-sided games (7 vs. 7) in youth soccer players (Fernandes Da Silva et al, 2016).…”