Quadriceps Oxygenation during Isometric Exercise in Sailing

 

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Abstract

The aim of the present study was to investigate why blood lactate after prolonged quadriceps contraction during hiking is only marginally increased. Eight sailors performed five 3-min hiking bouts interspersed with 5-s recovery periods. Whole body oxygen uptake, heart rate and lactate were recorded, along with continuous-wave near-infrared spectroscopy measures of quadriceps oxygenation. The time for 50 % re-oxygenation was also assessed as an indication of the degree of localized oxygen delivery stress. Hiking elicited a significant (p = 0.001) increase in mean (± SD) heart rate (124 ± 10 beats · min^-1) which was accompanied by a disproportionately low oxygen uptake (12 ± 2 ml · kg^-1 · min^-1). Lactate was significantly (p = 0.001) increased throughout hiking manoeuvres, though post-exercise it remained low (3.2 ± 0.9 mmol · l^-1). During the hiking bouts mean quadriceps oxygenation was significantly (p = 0.001) reduced compared to baseline (by 33 ± 5 %), indicating an imbalance between muscle oxygen accessibility and oxygen demand. During rest intervals quadriceps oxygenation was partially restored. After the end of the final bout the time for 50 % re-oxygenation was only 8 ± 2 s, whereas recovery of quadriceps oxygenation and oxygen uptake was completed within 3 min. We conclude that the observed low lactate could be attributed to the small oxygen and energy deficits during hiking as the muscles' oxygen accessibility is presumably partially restored during the brief rest intervals.

References

• 1 Blackburn M. Physiological responses to 90 min of simulated dinghy sailing.  J Sports Sci. 1994;  12 383-390
  PubMedGoogle Scholar
• 2 Borg G AV. Psychophysical basis of perceived exertion.  Med Sci Sports Exerc. 1982;  14 377-381
  PubMedGoogle Scholar
• 3 Boushel R, Langberg H, Olesen J, Gonzales-Alonzo J, Bulow J, Kjaer M. Monitoring tissue oxygen availability with near infrared spectroscopy (NIRS) in health and disease.  Scand J Med Sci Sports. 2001;  11 213-222
  CrossrefPubMedGoogle Scholar
• 4 Chance B, Nioka S, Kent J, McCully K K, Greenfeld R, Holtom G. Time resolved spectroscopy of haemoglobin and myoglobin in resting and ischemic muscle.  Ann Biochem. 1988;  174 698-707
  CrossrefPubMedGoogle Scholar
• 5 Chance B, Dait M T, Zhang C, Hamaoka T, Hagerman F. Recovery from exercise-induced desaturation in the quadriceps muscles of elite competitive rowers.  Am J Physiol. 1992;  262 C766-C775
  PubMedGoogle Scholar
• 6 De Blasi R A, Cope M, Elwell C, Safoue F, Ferrari M. Non-invasive measurement of human forearm oxygen consumption by near infrared spectroscopy.  Eur J App Physiol. 1993;  67 20-25
  CrossrefPubMedGoogle Scholar
• 7 De Vito G, Di Filippo L, Felici F, Gallozzi C, Madaffari A, Marino S, Rodio A. Assessment of energetic cost in Laser and Mistral Sailor.  Int J Sports Cardiol. 1996;  5 55-59
  PubMedGoogle Scholar
• 8 Felici F, Rodio A, Madaffari A, Ercolani L, Marchetti M. The cardiovascular work of competitive dinghy sailing.  J Sports Med Phys Fitness. 1999;  39 309-314
  PubMedGoogle Scholar
• 9 Grassi B, Quaresima V, Marconi C, Ferrari M, Cerretelli P. Blood lactate accumulation and muscle deoxygenation during incremental exercise.  J Appl Physiol. 1999;  87 348-355
  PubMedGoogle Scholar
• 10 Hamaoka T, Iwane H, Shimomitsu T, Katsumura T, Murase N, Nishio S, Osada T, Kurosawa Y, Chance B. Non-invasive measures of oxidative metabolism on working human muscles by near-infrared spectroscopy.  J Appl Physiol. 1996;  81 1410-1417
  PubMedGoogle Scholar
• 11 Harrison J, Bursztyn P, Coleman S, Hale T. A comparison of heart rate, oxygen uptake relationship for cycle and dinghy ergometry.  J Sports Sci. 1988;  6 160
  PubMedGoogle Scholar
• 12 Kime R, Hamaoka T, Sako T, Murakami M, Homma T, Katsumura T, Chance B. Delayed reoxygenation after maximal isometric handgrip exercise in high oxidative capacity muscle.  Eur J Appl Physiol. 2003;  89 34-41
  CrossrefPubMedGoogle Scholar
• 13 Lind A R. Cardiovascular adjustments to isometric contractions: static effort. Shepherd JT, Abbout FM Handbook of Physiology, Sect 2, The Cardiovascular System III. Bethesda, MD; American Physiological Society 1983: 947-966
  Google Scholar
• 14 Murthy G, Kahan N J, Hargens A R, Rempel D M. Forearm muscle oxygenation decreases with low levels of voluntary contraction.  J Orthop Res. 1997;  15 507-511
  CrossrefPubMedGoogle Scholar
• 15 Spurway N C. The physiological challenge of hiking. Legg SJ, Mackie H, Cochrane D Human Performance in Sailing Conference Proceedings, incorporating the 4th European Conference on Sailing Sports Science and Sports Medicine and the 3rd Australian Sailing Science Conference. Auckland, New Zealand; 2003: 1-18 (ISBN 0-473-09133-X)
  Google Scholar
• 16 Spurway N C, Burns R. Comparison of dynamic and static fitness training programmes for dinghy sailors - and some questions concerning the physiology of hiking.  Med Sci Res. 1993;  21 865-867
  PubMedGoogle Scholar
• 17 Vogiatzis I, Roach N K, Trowbridge E A. Cardiovascular muscular and blood lactate responses during dinghy hiking.  Med Sci Res. 1993;  21 865-867
  PubMedGoogle Scholar
• 18 Vogiatzis I, Spurway N C, Wilson J, Boreham C. Assessment of aerobic and anaerobic demands of dinghy sailing at different wind velocities.  J Sports Med Phys Fitness. 1995;  35 103-107
  PubMedGoogle Scholar
• 19 Vogiatzis I, Spurway N C, Jennett S, Wilson J, Sinclair J. Changes in ventilation related to changes in electromyography activity during repetitive bouts of isometric exercise in simulated sailing.  Eur J Appl Physiol. 1996;  72 195-203
  CrossrefPubMedGoogle Scholar
• 20 Wesche J. The time course and magnitude of blood flow changes in the human quadriceps muscles following isometric contraction.  J Physiol. 1986;  377 445-462
  PubMedGoogle Scholar

Dr. Ioannis Vogiatzis

Physical Education and Sports Science
University of Athens

41 Ethnikis Antistasis Avenue

17237 Athens

Greece

Phone: + 30 21 07 27 60 31

Fax: + 30 21 07 23 91 27

Email: gianvog@phed.uoa.gr