Abstract
This study aimed to determine metabolic and respiratory adaptations during intense exercise and improvement of long-sprint performance following six sessions of long-sprint training. Nine subjects performed before and after training (1) a 300-m test, (2) an incremental exercise up to exhaustion to determine the velocity associated with maximal oxygen uptake (v-VO2max), (3) a 70-s constant exercise at intensity halfway between the v-VO2max and the velocity performed during the 300-m test, followed by a 60-min passive recovery to determine an individual blood lactate recovery curve fitted to the bi-exponential time function: \( {\text{La}}\left( t \right) = {\text{La}}\left( 0 \right) + A_{ 1} ( 1- {\text{e}}^{{ - \gamma_{{ 1 } }}^{{t}}} ) +\; A_{ 2} ( 1- {\text{e}}^{{ - \gamma_{{ 2 }} }^{{t}}} ) \), and blood metabolic and gas exchange responses. The training program consisted of 3–6 repetitions of 150–250 m interspersed with rest periods with a duration ratio superior or equal to 1:10, 3 days a week, for 2 weeks. After sprint training, reduced metabolic disturbances, characterized by a lower peak expired ventilation and carbon dioxide output, in addition to a reduced peak lactate (P < 0.05), was observed. Training also induced significant decrease in the net amount of lactate released at the beginning of recovery (P < 0.05), and significant decrease in the net lactate release rate (NLRR) (P < 0.05). Lastly, a significant improvement of the 300-m performance was observed after training. These results suggest that long-sprint training of short durations was effective to rapidly prevent metabolic disturbances, with alterations in lactate accumulation and gas exchange, and improvement of the NLRR. Furthermore, only six long-sprint training sessions allow long-sprint performance improvement in active subjects.
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Acknowledgments
The authors would like to thank all athletes for their voluntary participation in this study and the athletes’ coaches. They also thank Mathieu RABATE and Virha DESPOTOVA for technical assistance and Leslie SEVERINO for English corrections and are grateful to the French Ministry of Health, Youth and Sport for their financial support.
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Communicated by Jean-René Lacour.
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Thomas, C., Bernard, O., Enea, C. et al. Metabolic and respiratory adaptations during intense exercise following long-sprint training of short duration. Eur J Appl Physiol 112, 667–675 (2012). https://doi.org/10.1007/s00421-011-2018-9
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DOI: https://doi.org/10.1007/s00421-011-2018-9