Abstract
This study examined the control of ventilation during repetitive bouts of isometric exercise in simulated sailing. Eight male sailors completed four successive 3-min bouts of similar isometric effort on a dinghy simulator, bouts were separated by 15-s rest intervals. Quadriceps muscle integrated electromyograph activity (iEMG) was recorded during each bout and expressed as a percentage of activity during maximal voluntary contraction (%iEMGmax). From the first to the fourth bout, the 3-min mean averages for ventilation and for %iEMGmax increased from 19.8 (SEM 1.1) to 37.5 (SEM 3.0) l · min−1 and from 31 (SEM 4) to 39 (SEM 4)% respectively; also, ventilation and %iEMGmax over each minute throughout the four bouts were significantly correlated (r = 0.85;P < 0.05). Progressive hyperventilation reduced the mean end-tidal partial pressure of carbon dioxide from 5.0 (SEM 0.3) kPa during bout 1 to 4.3 (SEM 0.4) kPa during bout 4 [37.7 (SEM 2.0) to 32.4 (SEM (3.0) mmHg]. From the first to the fourth bout the end-of-bout blood lactate concentration did not increase significantly although the concentration from the third bout onwards was significantly greater than at rest. The results suggested that the development of muscle fatigue, which was enhanced by the insufficiency of recovery during the 15-s intervals and mirrored in the progressive increase in iEMG, was linked with stimuli causing progressive hyperventilation. Though these changes in ventilation and iEMG could not be associated with changes in blood lactate concentration, they could both have been related to accumulating metabolites within the muscles themselves.
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References
Blackburn M (1994) Physiological responses to 90 minutes of simulated dinghy sailing. J Sports Sci 12:383–390
Borg GAV (1982) Psychophysical base of perceived exertion Med Sci Sports Exerc 14:377
Duncan G, Johnson RH, Lambie DG (1981) Role of sensory nerves in the cardiovascular and respiratory changes with isometric forearm exercise in man. Clin Sci 60:145–155
Edwards RG, Lippold OCJ (1956) The relation between force and integrated electrical activity in fatigued muscle. J Physiol (Lond) 132:677–681
Edwards RHT, Hill DK, McDonnell M (1972) Myothermal and intramuscular pressure measurements during isometric contractions of human quadriceps muscle. J Physiol (Lond) 224:58–59
Fallentin N, Jorgensen K, Simonsen EB (1993) Motor unit recruitment during prolonged isometric contractions. Eur J Appl Physiol 67:335–341
Funderburk GF, Hipskind SG, Welton RC, Lind AR (1974) Development of and recovery from fatigue induced by static effort at various tensions. J Appl Physiol 37:392–396
Gallozzi C, Fanton F, De Angelis M, Dal Monte A (1993) The energetic cost of sailing. Med Sci Res 21:851–53
Goodwin GM, McCloskey DI, Mitchell JH (1972) Cardiovascular and respiratory responses to changes in central command during isometric exercise at constant muscle tension. J Physiol (Lond) 226:173–190
Harrison J, Bursztyn P, Coleman S, Hale T (1988) A comparison of heart rate, oxygen uptake relationship for cycle and dinghy ergometry. J Sports Sci 6:160
Hnik P, Vyskocil F, Ujec E, Vejsada R (1986) Work-induced potassium loss from skeletal muscles and its physiological implications. In: Saltin B(ed) Biochemistry of exercise, VI Human Kinetics, Ill. Champaign, pp 345–364
Kilbom A, Person K (1982) Leg blood flow during static exercise. Eur J Appl Physiol 48:367–377
Komi PV, Viitasalo JHT (1976) Signal characteristics of EMG at different levels of muscle tension. Acta Physiol Scand 96:267–276
Lind AR, McNicol GW (1967) Muscular factors which determine the cardiovascular responses to sustained and rhythmic exercise. Can Med Assoc J 96:706–715
Lind AR, Petrofsky IS (1979) Amplitude of the surface electromyogram during fatiguing isometric contractions. Muscle Nerve 2:257–264
Lloyd AJ (1971) Surface electromyography during sustained isometric contractions. J Appl Physiol 30:713–719
Marchetti M, Figura F, Ricci B (1980) Biomechanics of two fundamental sailing postures. J Sports Med 20:325–332
Mateika JH, Duffin J (1994) Coincidental changes in ventilation and electromyographic activity during consecutive incremental exercise tests. Eur J Appl Physiol 68:54–61
McCloskey DI, Mitchell JH (1972) Reflex cardiovascular and respiratory responses originating in exercising muscle. J Physiol (Lond) 224:173–186
Muza SR, Lee LY, Wiley RL, McDonald S, Zechman FW (1983) Ventilatory responses to static handgrip exercise. J App Physiol 54:1457–1462
Myhre K, Andersen KL (1971) Respiratory responses to static muscular work. Respir Physiol 12:77–89
Nagata A, Muro M, Moritani T, Yoshida T (1981) Anaerobic threshold determination by blood lactate and myoelectric signals. Jpn J Physiol 31:585–597
Phillipson EA, Bowes G, Townsend ER, Duffin J, Cooper JD (1981) Carotid chemoreceptors in ventilatory responses to changes in venous carbon dioxide load. J Appl Physiol 51:1398–1403
Poole DC, Ward SA, Whipp BJ (1988) Control of blood-gas and acid-base status during isometric exercise in humans. J Physiol (Lond) 396:365–377
Sahlin K (1986) Muscle fatigue and lactic acid accumulation. Acta Physiol Scand 128 [Suppl 556]:83–91
Sahlin K, Harris RC, Hultman E (1975) Creatine kinase equilibrium and lactate content compared with muscle pH in tissue samples obtained after isometric exercise. Biochem J 152:173–180
Saltin B, Sjogaard G, Gaffiney FA, Rowell LB (1981) Potassium, lactate, and water fluxes in human quadriceps in muscle during static contractions. Circ Res 48 [Suppl 1]:18–25
Shephard RJ (1990) The biology and medicine of sailing J. Sports Med 9:86–99
Sjogaard G, Savard G, Juel C (1988) Muscle blood flow during isometric activity and its relation to muscle fatigue. Eur J Appl Physiol 57:327–335
Spurway NC, Burns R (1993) Comparison of dynamic and static fitness-training programmes for dinghy sailors and some questions concerning the physiology of hiking. Med Sci Res 21:865–867
Tallarida G, Baldoni F, Peruzzi G, Raimindi G, Massaro M, Sangiorgi M (1981) Cardiovascular and respiratory reflexes from muscles in dynamic and static exercise. J Appl Physiol 50:784–791
Tibes U (1977) Reflex inputs to the cardiovascular and respiratory centres from dynamically working canine muscles. Circ Res 41:332–341
Viitasalo JT, Luhtanen P, Rahkila P, Rusko H (1985) Electromyographic activity related to aerobic and anaerobic threshold in ergometer bicycling. Acta Physiol Scand 124:287–293
Vogiatzis I, Roach NK, Trowbridge EA (1993) Cartiovascular, muscular and blood lactate responses during dinghy “hiking”. Med Sci Res 21:861–863
Vogiatzis I, Spurway NC, Wilson J (1994) On-water oxygen uptake measurements during dinghy sailing. J Sports Sci 12:153
Vogiatzis I, Spurway NC, Jennett S, Wilson J, Sinclair J (1995) Respiratory and metabolic responses during successive bouts of isometric exercise (simulated dinghy sailing) in humans. J Physiol 483:132–133P
Vogiatzis I, Spurway NC, Wilson J, Boreham C Assessment of aerobic and anaerobic demands of dinghy sailing at different wind velocities. J Sports Med Phys Fitness (in press)
Whelan RF, Young IM (1953) The effect of adrenaline and noradrenaline infusions on respiration in man. Br J Pharmacol 8:98–102
Wiley RL, Lind AR (1971) Respiratory responses to sustained static muscular contractions in humans. Clin Sci 40:221–234
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Vogiatzis, I., Spurway, N.C., Jennett, S. et al. Changes in ventilation related to changes in electromyograph activity during repetitive bouts of isometric exercise in simulated sailing. Europ. J. Appl. Physiol. 72, 195–203 (1996). https://doi.org/10.1007/BF00838638
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DOI: https://doi.org/10.1007/BF00838638