Validity and Reliability of Critical Speed, Critical Stroke Rate, and Anaerobic Capacity in Relation to Front Crawl Swimming Performances

Abstract

The purpose of this investigation was to determine whether the concepts of critical swimming speed, critical stroke rate and anaerobic swimming capacity could be used by coaches as a reliable index in order to monitor endurance performances in competitive swimmers. The results of this study conducted with well-trained swimmers showed that the 30-min test velocity (V₃₀) is not different from the critical swimming speed determined from 200- and 400-m tests but is overestimated by 3.2 %. Furthermore, a regression analysis of the number of stroke cycles on time calculated for each swimmer showed a linear relationship (r² greater than 0.99 and p less than 0.01). The 30-min stroke rate test (SR₃₀) was not different from the critical stroke rate determined from 200- and 400-m tests after a correction of minus 3.9 %. These data suggest that the slope of this regression line represents the critical stroke rate defined as the maximal stroke rate value, which can theoretically be maintained continuously without exhaustion. Coaches could easily use critical swimming speed combined with critical stroke rate in order not only to set aerobic training loads but also to control the swimming technique during training. Besides, anaerobic swimming capacity (ASC) values defined as the y-intercept of the regression line between distance and time were not correlated (p > 0.05) with the determined distance over which a significant drop in the maximal speed could be noticed on a 25-m test. Thus, ASC does not provide a reliable estimation of the anaerobic capacity.

Key words

Swimming · critical speed · critical stroke rate · anaerobic capacity.

References

• 1 Bishop D, Jenkins D G, Howard A. The critical power function is dependent on the duration of the predictive exercise tests chosen.  Int J Sports Med. 1998;  19 125-129
• 2 Chollet D, Pelayo P, Moretto P, Sidney M. Energetic effects of controlled swimming speed and stroking frequency in less skilled swimmers. Troup JP, Hollander AP, Strasse D, Trappe SW, Cappaert JM, Trappe TA (eds) In: Biomechanics and Medicine in Swimming, Swimming Science VII. Spon; Chapman and Hall 1996: 172-176
• 3 Costill D L, Kovaleski J, Porter D, Kirwan J, Fielding R, King D. Energy expenditure during front crawl swimming: predicting success in middle distance events.  Int J Sports Med. 1985;  6 266-270
• 4 Costill D L, Maglischo B W, Richardson A B. La natation. Paris; Vigot 1994: 215
• 5 Craig A B, Skehan P L, Pawelczyk J A, Boomer W L. Velocity, stroke rate and distance per stroke during elite swimming competition.  Med Sci Sports Exerc. 1985;  17 625 - 634
• 6 Ettema J H. Limits of human performance and energy production.  Int Z Angew Physiol Einschl Arbeitphysiol. 1966;  22 45-54
• 7 Fernandes R, Vilas-Boas J P. Critical velocity as a criterion for estimating aerobic training pace in juvenile swimmers. Keskinen KL, Komi PV, Hollander AP (eds) In: Biomechanics and Medicine and Swimming VIII. Jyväskylä; Grummerus Printing 1999: 233-238
• 8 Hill D W. The critical power concept.  Sports Med. 1993;  16 237-254
• 9 Hill D W, Rose I E, Smith J C. A method to ensure the accuracy of estimates of anaerobic capacity derived using the critical power concept.  Med Sci Sports Exerc. 1993;  25 S108
• 10 Hill A V, Steward R P, Lane C J. Application of the critical power concept to young swimmers.  Paed Exerc Sci. 1995;  7 281 - 293
• 11 Hill D W, Ferguson C S. A physiological description of critical velocity.  Eur J Appl Physiol. 1999;  79 290-293
• 12 Housh D J, Housh T J, Bauge S M. The accuracy of the critical power test for predicting time to exhaustion during cycle ergometer.  Ergonomics. 1989;  32 997-1004
• 13 Housh D J, Housh T J, Bauge S M. A methodological consideration for the determination of critical power and anaerobic work capacity.  Res Q Exerc Sport. 1990;  61 406-409
• 14 Housh T J, Johnson G O, McDowell S L, Housh D J, Pepper M L. Physiological responses at the fatigue threshold.  Int J Sports Med. 1991;  12 305-308
• 15 Hughson R L, Orok C J, Staudt L E. A high velocity running test to assess endurance running potential.  Int J Sports Med. 1984;  5 23-25
• 16 Jenkins D G, Quigley B M. Blood lactate in trained cyclists during cycle ergometry at critical power.  Eur J Appl Physiol. 1990;  61 278-283
• 17 Jenkins D G, Quigley B M. The y-intercept of the critical power function as a measure of anaerobic work capacity.  Ergonomics. 1991;  34 13-22
• 18 Keskinen K L, Komi P V. Stroking characteristics of front crawl swimming during exercise.  J Appl Biomech. 1993;  9 219-226
• 19 Kolbe T, Dennis S C, Selley E, Noakes T D, Lambert M I. The relationship between critical power and running performance.  J Sports Sci. 1995;  13 265-269
• 20 MacLaren D PM, Coulson M. Critical swim speed can be used to determine changes in training status. In: Keskinen KL, Komi PV, Hollander AP (eds) Biomechanics and medicine and swimming VIII. Jyväskylä; Grummerus Printing 1999: 227-232
• 21 Maglischo E W. Swimming even faster. Mayfield Mountain View; Publishing Compagny 1993
• 22 McLellan T M, Cheung K SY. A comparative evaluation of the individual anaerobic threshold and the critical power.  Med Sci Sports Exerc. 1992;  24 543-550
• 23 Monod H, Scherrer J. The work capacity of synergic muscle groups.  Ergonomics. 1965;  8 329-338
• 24 Moritani T, Nagata A, De Vries H A, Muro M. Critical power as a measure of physical work capacity and anaerobic threshold.  Ergonomics. 1981;  24 339-350
• 25 Morton R H. A 3-parameter critical power model.  Ergonomics. 1996;  39 611-619
• 26 Nebelsick-Gullett L J, Housh T J, Johnson T O, Bauge S M. A comparison between methods of measuring anaerobic work capacity.  Ergonomics. 1988;  31 1413-1419
• 27 Olbrecht J, Madsen O, Mader A, Liesel H, Hollman W. Relationship between swimming velocity and lactic acid concentration during continuous and intermittent training exercise.  Int J Sports Med. 1985;  6 74-77
• 28 Olbrecht J, Mader A, Madsen O, Liesel H, Hollman W. The relationship to lactic acid to long-distance swimming and the 2*400m “2-speed test” and the implication for adjusting training intensities. In: Ungerechts BE, Wilkie K, Reische K (eds) Swimming Science V. Champaign; Human kinetics books 1988: 261-267
• 29 Pelayo P, Sidney M, Kherif T, Chollet D, Tourny C. Stroking characteristics in free style swimming and relationships with anthropometric characteristics.  J Appl Biomech. 1996;  12 197-206
• 30 Pelayo P, Sidney M, Weissland T. Effects of variations of spontaneously chosen rate during crank upper-body and swimming exercise.  J Hum Movem Stud. 1998;  33 171-180
• 31 Platonov V N. L’entraînement sportif. Théorie et méthodologie. Paris; Revue EPS 1988: 289
• 32 Poole D C, Ward S A, Gardner G W, Whipp B J. Metabolic and respiratory profile of the upper limit for prolonged exercise in man.  Ergonomics. 1988;  31 1265-1279
• 33 Sjodin B H, Jacobs I. Onset of blood lactate accumulation and marathon running performance.  Int J Sports Med. 1981;  2 23-26
• 34 Smith J C, Dangelmaier B S, Hill D W. Critical power is related to cycling time trial performance.  Int J Sports Med. 1999;  20 374-378
• 35 Swaine I, Reilly T. The freely chosen swimming stroke rate in a maximal swim and on a biokinetic swim bench.  Med Sci Sports Exerc. 1983;  5 370-375
• 36 Toussaint H B, Wakayoshi K, Hollander H P, Ogita F. Simulated front crawl swimming performance related to critical speed and critical power.  Med Sci Sports Exerc. 1997;  24 144-151
• 37 Vautier J F, Vandewalle H, Arabi H, Monod H. Critical power as an endurance index.  Appl Ergonomics. 1995;  26 117-121
• 38 Vandewalle H, Kapitaniak B, Grün S, Raveneau S, Monod H. Comparison between a 30 s all-out test and time-work test on a cycle ergometer.  Eur J Appl Physiol. 1989;  58 375-380
• 39 Vandewalle H, Vautier J F, Kachouri M, Lechevalier J M, Monod H. Work-exhaustion time relationships and the critical power concept.  J Sports Med Phys Fitness. 1997;  37 89-102
• 40 Vilas-Boas J P, Lamares J P, Fernandes R, Duarte J A. Relationship between anaerobic threshold and swimming critical speed determined with competition times.  In: Abstracts book of the FIMS 9th European Congress of Sports Medicine. Porto; 1997: 88-91
• 41 Wakayoshi K, Ikuta K, Yoshida T, Udo M, Moritani T, Mutoh Y, Miyashita M. Determining and validity of critical velocity as an index of swimming performance in the competitive swimmer.  Eur J Appl Physiol. 1992;  64 153-157
• 42 Wakayoshi K, Yoshida T, Udo M, Kasai T, Moritani T, Mutoh Y, Miyashita M. A simple method for determining critical speed as swimming fatigue threshold in competitive swimming.  Int J Sports Med. 1992;  13 367-371
• 43 Wakayoshi K, Yoshida T, Udo M, Harada T, Moritani T, Mutoh Y, Miyashita M. Does critical swimming velocity represent exercise intensity at maximal lactate steady state?.  Eur J Appl Physiol. 1993;  66 90-95
• 44 Wakayoshi K, D’Acquisto L J, Cappaert J M, Troup J P. Relationship between oxygen uptake, stroke rate and swimming velocity in competitive swimming.  Int J Sports Med. 1995;  16 19-23
• 45 Weiss M, Reischle K, Bouws N, Simon G, Weicker H. Relationship of blood lactate accumulation to stroke rate and distance per stroke in top female swimmers. In: Ungerechts BE, Wilke K, Reischle K (eds) Swimming Science V. Champaign; Human Kinetics 1988: 295-303
• 46 Wright B, Smith D J. A protocol for the determining of critical speed as an index of swimming endurance performance.  Med Sport Sci. 1994;  39 55-59