geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Metabolic and neuromuscular adaptations to endurance training in professional cyclists: a longitudinal study


, : Metabolic and neuromuscular adaptations to endurance training in professional cyclists: a longitudinal study. Japanese Journal of Physiology 50(3): 381-388

The aim of this longitudinal study was to analyze the changes in several metabolic and neuromuscular variables in response to endurance training during three defined periods of a full sports season (rest, precompetition and competition). The study population was formed by thirteen professional cyclists (age +/- SEM: 24+/-1 years; mean V(O2 max) approximately 74 ml kg(-1) min(-1)). In each testing session, subjects performed a ramp test until exhaustion on a cycle ergometer (workload increases of 25 W min(-1)). The following variables were recorded every 100 W until the tests: oxygen consumption (V(O2) in l min(-1)), respiratory exchange ratio (RER in V(CO2) V(O2)(-1)) and blood lactate, pH and bicarbonate concentration [HCO3(-)]. Surface electromyography (EMG) recordings were also obtained from the vastus lateralis to determine the variables: root mean square voltage (rms-EMG) and mean power frequency (MPF). RER and lactate values both showed a decrease (p<0.05) throughout the season at exercise intensities corresponding to submaximal workloads. In contrast, no significant differences were found in mean pH or [HCO(3-)]. Finally, rms-EMG tended to increase during the season, with significant differences (p<0.05) observed mainly between the competition and rest periods at most workloads. In contrast, precompetition MPF values increased (p<0.05) with respect to resting values at most submaximal workloads but fell (p<0.05) during the competition period. Our findings suggest that endurance conditioning induces the following general adaptations in elite athletes: (1) lower circulating lactate and increased reliance on aerobic metabolism at a given submaximal intensity, and possibly (2) an enhanced recruitment of motor units in active muscles, as suggested by rms-EMG data.

US$29.90

PMID: 11016988


Other references

Remizov, S.M.; Prujansky, L.Y.; Matveevsky, R.M., 1991: Wear resistance and microhardness of human teeth. The dependence between the wear resistance and microhardness of the different tissues of human teeth has been studied. During these experiments the proportionality between the wear volume of the tissues under study and their microhardness (by inde...

Tran, C.D.; Campbell, M.A.F.; Kolev, Y.; Chamberlain, S.; Huynh, H.Q.; Butler, R.N., 2005: Short-term zinc supplementation attenuates Helicobacter felis-induced gastritis in the mouse. Background: Mucosal damage by H. pylori infection is mainly caused by neutrophils producing large quantities of reactive oxygen species (ROS). Metallothionein (MT) an intracellular, low-molecular, cysteine-rich protein, which is inducible by dieta...

Matsuta M.; Kagabu T.; Nishiya I., 1987: Immunohistochemical studies on tumor antigen 4 in squamous cells carcinoma of uterine cervix. Immunohistochemical localization of Tumor Antigen 4 (TA-4) in squamous cell carcinoma (SCC) tissues of the uterine cervix was studied by means of the immunoperoxidase methods. Light microscopic detection of TA-4 was carried out by means of the avi...

Tunis, M.M.; Wolff, H.G., 1952: Studies on headache: further observations on cranial and conjunctival vessels during and between attacks of vascular headache. A.M.A. Archives of Neurology and Psychiatry 67(5): 693-694

Dong, Q-Fen.; Liu, C-Wu.; Guo, Y-Song.; Liu, L.; Wu, Y., 2007: Microsatellite analysis of genetic diversity and phylogenetic relationship of nine species of grouper in genus Epinephelus. Thirteen microsatellite markers of Epinephelus awoara previously discovered by our lab were selected to analyze the genetic diversity and phylogenetic relationship of nine species of grouper (E. awoara, E. merra, E. fario, E. fasciatus, E. lanceol...

Brown R.J., 1990: Flight nurse course structure today. Aviation Space & Environmental Medicine 61(5): 462

Calciolari, G.; Leva, L.; Gatti, M.G.; Buonocore, G., 1994: Psychologically orientated care of low birth weight infants. Biology of the Neonate 66(2-3): 159

Deniffel, D.; Nuyen, B.; Pak, K.; Suzukawa, K.; Hung, J.; Kurabi, A.; Wasserman, S.I.; Ryan, A.F., 2017: Otitis Media and Nasopharyngeal Colonization in iccl3 -/- Mice. We previously found CC chemokine ligand 3 (CCL3) to be a potent effector of inflammation during otitis media (OM): exogenous CCL3 rescues the OM phenotype of tumor necrosis factor-deficient mice and the function of macrophages deficient in several...

Parker, C.A.; Weber, J.M., 1993: An enzyme-linked immunosorbent assay for the detection of IgG and IgM antibodies to human herpesvirus type 6. A lysate of human herpesvirus type 6 (HHV6) infected HSB2 cells was used as antigen for an enzyme-linked immunosorbent assay (ELISA) for the detection of IgG and IgM antibody to HHV6. 78 clinical samples were tested for the presence of HHV6-specif...

Hüttermann, A., 1972: Activity of UDP-glucose-pyrophosphorylase and UDP-glucose-4-epimerase during differentiation of Physarum polycephalum. Hoppe-Seyler's Zeitschrift für Physiologische Chemie 353(10): 1529-1529