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Effect of fluid ingestion on neuromuscular function during prolonged cycling exercise.
Br J Sports Med. 2005 Apr; 39(4):e17.BJ

Abstract

OBJECTIVES

To investigate the effects of fluid ingestion on neuromuscular function during prolonged cycling exercise.

METHODS

Eight well trained subjects exercised for 180 minutes in a moderate environment at a workload requiring approximately 60% maximal oxygen uptake. Two conditions, fluid (F) and no fluid (NF) ingestion, were investigated.

RESULTS

During maximal voluntary isometric contraction (MVC), prolonged cycling exercise reduced (p<0.05) the maximal force generating capacity of quadriceps muscles (after three hours of cycling) and root mean square (RMS) values (after two hours of cycling) with no difference between the two conditions despite greater body weight loss (p<0.05) in NF. The mean power frequency (MPF) for vastus lateralis muscle was reduced (p<0.05) and the rate of force development (RFD) was increased (p<0.05) only during NF. During cycling exercise, integrated electromyographic activity and perceived exertion were increased in both conditions (p<0.05) with no significant effect of fluid ingestion.

CONCLUSIONS

The results suggest that fluid ingestion did not prevent the previously reported decrease in maximal force with exercise duration, but seems to have a positive effect on some indicators of neuromuscular fatigue such as mean power frequency and rate of force development during maximal voluntary contraction. Further investigations are needed to assess the effect of change in hydration on neural mechanisms linked to the development of muscular fatigue during prolonged exercise.

Authors+Show Affiliations

E.A. 3162 Laboratoire Ergonomie Sportive et Performance, Université de Toulon-Var, BP 20132, 83957 La Garde Cedex, France. vallier@univ-tln.fr <vallier@univ-tln.fr>No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

15793075

Citation

Vallier, J-M, et al. "Effect of Fluid Ingestion On Neuromuscular Function During Prolonged Cycling Exercise." British Journal of Sports Medicine, vol. 39, no. 4, 2005, pp. e17.
Vallier JM, Grego F, Basset F, et al. Effect of fluid ingestion on neuromuscular function during prolonged cycling exercise. Br J Sports Med. 2005;39(4):e17.
Vallier, J. M., Grego, F., Basset, F., Lepers, R., Bernard, T., & Brisswalter, J. (2005). Effect of fluid ingestion on neuromuscular function during prolonged cycling exercise. British Journal of Sports Medicine, 39(4), e17.
Vallier JM, et al. Effect of Fluid Ingestion On Neuromuscular Function During Prolonged Cycling Exercise. Br J Sports Med. 2005;39(4):e17. PubMed PMID: 15793075.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of fluid ingestion on neuromuscular function during prolonged cycling exercise. AU - Vallier,J-M, AU - Grego,F, AU - Basset,F, AU - Lepers,R, AU - Bernard,T, AU - Brisswalter,J, PY - 2005/3/29/pubmed PY - 2005/6/9/medline PY - 2005/3/29/entrez SP - e17 EP - e17 JF - British journal of sports medicine JO - Br J Sports Med VL - 39 IS - 4 N2 - OBJECTIVES: To investigate the effects of fluid ingestion on neuromuscular function during prolonged cycling exercise. METHODS: Eight well trained subjects exercised for 180 minutes in a moderate environment at a workload requiring approximately 60% maximal oxygen uptake. Two conditions, fluid (F) and no fluid (NF) ingestion, were investigated. RESULTS: During maximal voluntary isometric contraction (MVC), prolonged cycling exercise reduced (p<0.05) the maximal force generating capacity of quadriceps muscles (after three hours of cycling) and root mean square (RMS) values (after two hours of cycling) with no difference between the two conditions despite greater body weight loss (p<0.05) in NF. The mean power frequency (MPF) for vastus lateralis muscle was reduced (p<0.05) and the rate of force development (RFD) was increased (p<0.05) only during NF. During cycling exercise, integrated electromyographic activity and perceived exertion were increased in both conditions (p<0.05) with no significant effect of fluid ingestion. CONCLUSIONS: The results suggest that fluid ingestion did not prevent the previously reported decrease in maximal force with exercise duration, but seems to have a positive effect on some indicators of neuromuscular fatigue such as mean power frequency and rate of force development during maximal voluntary contraction. Further investigations are needed to assess the effect of change in hydration on neural mechanisms linked to the development of muscular fatigue during prolonged exercise. SN - 1473-0480 UR - https://www.unboundmedicine.com/medline/citation/15793075/Effect_of_fluid_ingestion_on_neuromuscular_function_during_prolonged_cycling_exercise_ L2 - http://bjsm.bmj.com/cgi/pmidlookup?view=long&amp;pmid=15793075 DB - PRIME DP - Unbound Medicine ER -