PMID- 37123252
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20231226
IS  - 1664-042X (Print)
IS  - 1664-042X (Electronic)
IS  - 1664-042X (Linking)
VI  - 14
DP  - 2023
TI  - A modified formula using energy system contributions to calculate pure maximal 
      rate of lactate accumulation during a maximal sprint cycling test.
PG  - 1147321
LID - 10.3389/fphys.2023.1147321 [doi]
LID - 1147321
AB  - Purpose: This study aimed at comparing previous calculating formulas of maximal 
      lactate accumulation rate ( (nu) (La.max)) and a modified formula of pure (nu) 
      (La.max) (P (nu) (La.max)) during a 15-s all-out sprint cycling test (ASCT) to 
      analyze their relationships. Methods: Thirty male national-level track cyclists 
      participated in this study (n = 30) and performed a 15-s ASCT. The anaerobic 
      power output (W(peak) and W(mean)), oxygen uptake, and blood lactate 
      concentrations (La(-)) were measured. These parameters were used for different 
      calculations of (nu) (La.max) and three energy contributions (phosphagen, W (PCr); 
      glycolytic, W (Gly); and oxidative, W (Oxi)). The P (nu) (La.max) calculation 
      considered delta La(-), time until W(peak) (t(PCr-peak)), and the time 
      contributed by the oxidative system (t(Oxi)). Other (nu) (La.max) levels without 
      t(Oxi) were calculated using decreasing time by 3.5% from W(peak) (t(PCr -3.5%)) 
      and t(PCr-peak). Results: The absolute and relative W (PCr) were higher than W 
      (Gly) and W (Oxi) (p < 0.0001, respectively), and the absolute and relative W 
      (Gly) were significantly higher than W (Oxi) (p < 0.0001, respectively); (nu) 
      (La.max) (t(PCr -3.5%)) was significantly higher than P (nu) (La.max) and (nu) 
      (La.max) (t(PCr-peak)), while (nu) (La.max) (t(PCr-peak)) was lower than P (nu) 
      (La.max) (p < 0.0001, respectively). P (nu) (La.max) and (nu) (La.max) 
      (t(PCr-peak)) were highly correlated (r = 0.99; R (2) = 0.98). This correlation 
      was higher than the relationship between P (nu) (La.max) and (nu) (La.max) (t(PCr 
      -3.5%)) (r = 0.87; R (2) = 0.77). (nu) (La.max) (t(PCr-peak)), P (nu) (La.max), and 
      (nu) (La.max) (t(PCr -3.5%)) were found to correlate with absolute W(mean) and W 
      (Gly). Conclusion: P (nu) (La.max) as a modified calculation of (nu) (La.max) 
      provides more detailed insights into the inter-individual differences in energy 
      and glycolytic metabolism than (nu) (La.max) (t(PCr-peak)) and (nu) (La.max) (t(PCr 
      -3.5%)). Because W (Oxi) and W (PCr) can differ remarkably between athletes, 
      implementing their values in P (nu) (La.max) can establish more optimized 
      individual profiling for elite track cyclists.
CI  - Copyright (c) 2023 Yang, Park, Kim, Jeon, Heine and Gehlert.
FAU - Yang, Woo-Hwi
AU  - Yang WH
AD  - Graduate School of Sports Medicine, CHA University, Pocheon-si, Gyeonggi-do, 
      Republic of Korea.
AD  - Department of Medicine, General Graduate School, CHA University, Pocheon-si, 
      Gyeonggi-do, Republic of Korea.
FAU - Park, So-Young
AU  - Park SY
AD  - Graduate School of Sports Medicine, CHA University, Pocheon-si, Gyeonggi-do, 
      Republic of Korea.
FAU - Kim, Taenam
AU  - Kim T
AD  - Graduate School of Sports Medicine, CHA University, Pocheon-si, Gyeonggi-do, 
      Republic of Korea.
FAU - Jeon, Hyung-Jin
AU  - Jeon HJ
AD  - Department of Medicine, General Graduate School, CHA University, Pocheon-si, 
      Gyeonggi-do, Republic of Korea.
FAU - Heine, Oliver
AU  - Heine O
AD  - Olympic Base Center Rhineland, Cologne, Germany.
FAU - Gehlert, Sebastian
AU  - Gehlert S
AD  - Department for Biosciences of Sports, Institute of Sports Science, University of 
      Hildesheim, Hildesheim, Germany.
AD  - Institute of Cardiovascular Research and Sports Medicine, German Sport University 
      Cologne, Cologne, Germany.
LA  - eng
PT  - Journal Article
DEP - 20230413
PL  - Switzerland
TA  - Front Physiol
JT  - Frontiers in physiology
JID - 101549006
EIN - Front Physiol. 2023 Dec 11;14:1297684. PMID: 38146505
PMC - PMC10133696
OTO - NOTNLM
OT  - anaerobic performance
OT  - anaerobic power output
OT  - diagnostics
OT  - glycolytic metabolism
OT  - lactate
COIS- The authors declare that the research was conducted in the absence of any 
      commercial or financial relationships that could be construed as a potential 
      conflict of interest.
EDAT- 2023/05/01 06:42
MHDA- 2023/05/01 06:43
PMCR- 2023/04/13
CRDT- 2023/05/01 03:28
PHST- 2023/01/18 00:00 [received]
PHST- 2023/03/27 00:00 [accepted]
PHST- 2023/05/01 06:43 [medline]
PHST- 2023/05/01 06:42 [pubmed]
PHST- 2023/05/01 03:28 [entrez]
PHST- 2023/04/13 00:00 [pmc-release]
AID - 1147321 [pii]
AID - 10.3389/fphys.2023.1147321 [doi]
PST - epublish
SO  - Front Physiol. 2023 Apr 13;14:1147321. doi: 10.3389/fphys.2023.1147321. 
      eCollection 2023.