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The reconstitution of W' depends on both work and recovery characteristics

Kevin Caen (UGent) , Jan Bourgois (UGent) , Gil Bourgois (UGent) , Thibaux Van der Stede (UGent) , Kobe Vermeire (UGent) and Jan Boone (UGent)
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Abstract
Purpose: This study aimed to investigate the effects of different work and recovery characteristics on the W ' reconstitution and to test the predictive capabilities of the W '(BAL) model. Methods: Eleven male participants (22 +/- 3 yr, 55 +/- 4 mLkg(-1)min(-1)) completed three to five constant work rate tests to determine CP and W '. Subsequently, subjects performed 12 experimental trials, each comprising two exhaustive constant work rate bouts (i.e., WB1 and WB2), interspersed by an active recovery interval. In each trial, work bout characteristics (P4 or P8, i.e., the work rate predicted to result in exhaustion in 4 and 8 min, respectively), recovery work rate (33% CP or 66% CP), and recovery duration (2, 4, or 6 min) were varied. Actual (W '(ACT)) and model-predicted (W '(PRED)) reconstitution values of W ' were calculated. Results: After 2, 4, and 6 min recovery, W '(ACT) averaged 46% +/- 2.7%, 51.2% +/- 3.3%, and 59.4% +/- 4.1%, respectively (P = 0.003). W '(ACT) was 9.4% higher after recovery at 33% CP than at 66% CP (56.9% +/- 3.9% vs 47.5% +/- 3.2%) (P = 0.019). P4 exercise yielded a 11.3% higher W '(ACT) than P8 exercise (57.8% +/- 3.9% vs 46.5% +/- 2.7%) (P = 0.001). W '(ACT) was higher than W '(PRED) in the conditions P4-2 min (+29.7%), P4-4 min (+18.4%), and P8-2 min (+18%) (P < 0.01). A strong correlation (R = 0.68) between the rate of W ' depletion and W ' recovery was found (P = 0.001). Conclusion: This study demonstrated that both the work and recovery characteristics of a prior exhaustive exercise bout can affect the W ' reconstitution. Results revealed a slower W ' reconstitution when the rate of W ' depletion was slower as well. Furthermore, it was shown that the current W '(BAL) model underestimates actual W ' reconstitution, especially after shorter recovery.
Keywords
CRITICAL POWER, W ', RECONSTITUTION, RECOVERY, MODELING, MUSCLE METABOLIC-RESPONSES, PRIOR HEAVY EXERCISE, CRITICAL POWER, EXHAUSTIVE EXERCISE, INTENSITY EXERCISE, DURATION, PERFORMANCE, PARAMETERS, HUMANS, MODEL

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MLA
Caen, Kevin, et al. “The Reconstitution of W’ Depends on Both Work and Recovery Characteristics.” MEDICINE AND SCIENCE IN SPORTS AND EXERCISE, vol. 51, no. 8, 2019, pp. 1745–51.
APA
Caen, K., Bourgois, J., Bourgois, G., Van der Stede, T., Vermeire, K., & Boone, J. (2019). The reconstitution of W’ depends on both work and recovery characteristics. MEDICINE AND SCIENCE IN SPORTS AND EXERCISE, 51(8), 1745–1751.
Chicago author-date
Caen, Kevin, Jan Bourgois, Gil Bourgois, Thibaux Van der Stede, Kobe Vermeire, and Jan Boone. 2019. “The Reconstitution of W’ Depends on Both Work and Recovery Characteristics.” MEDICINE AND SCIENCE IN SPORTS AND EXERCISE 51 (8): 1745–51.
Chicago author-date (all authors)
Caen, Kevin, Jan Bourgois, Gil Bourgois, Thibaux Van der Stede, Kobe Vermeire, and Jan Boone. 2019. “The Reconstitution of W’ Depends on Both Work and Recovery Characteristics.” MEDICINE AND SCIENCE IN SPORTS AND EXERCISE 51 (8): 1745–1751.
Vancouver
1.
Caen K, Bourgois J, Bourgois G, Van der Stede T, Vermeire K, Boone J. The reconstitution of W’ depends on both work and recovery characteristics. MEDICINE AND SCIENCE IN SPORTS AND EXERCISE. 2019;51(8):1745–51.
IEEE
[1]
K. Caen, J. Bourgois, G. Bourgois, T. Van der Stede, K. Vermeire, and J. Boone, “The reconstitution of W’ depends on both work and recovery characteristics,” MEDICINE AND SCIENCE IN SPORTS AND EXERCISE, vol. 51, no. 8, pp. 1745–1751, 2019.
@article{8608947,
  abstract     = {Purpose: This study aimed to investigate the effects of different work and recovery characteristics on the W ' reconstitution and to test the predictive capabilities of the W '(BAL) model.
Methods: Eleven male participants (22 +/- 3 yr, 55 +/- 4 mLkg(-1)min(-1)) completed three to five constant work rate tests to determine CP and W '. Subsequently, subjects performed 12 experimental trials, each comprising two exhaustive constant work rate bouts (i.e., WB1 and WB2), interspersed by an active recovery interval. In each trial, work bout characteristics (P4 or P8, i.e., the work rate predicted to result in exhaustion in 4 and 8 min, respectively), recovery work rate (33% CP or 66% CP), and recovery duration (2, 4, or 6 min) were varied. Actual (W '(ACT)) and model-predicted (W '(PRED)) reconstitution values of W ' were calculated.
Results: After 2, 4, and 6 min recovery, W '(ACT) averaged 46% +/- 2.7%, 51.2% +/- 3.3%, and 59.4% +/- 4.1%, respectively (P = 0.003). W '(ACT) was 9.4% higher after recovery at 33% CP than at 66% CP (56.9% +/- 3.9% vs 47.5% +/- 3.2%) (P = 0.019). P4 exercise yielded a 11.3% higher W '(ACT) than P8 exercise (57.8% +/- 3.9% vs 46.5% +/- 2.7%) (P = 0.001). W '(ACT) was higher than W '(PRED) in the conditions P4-2 min (+29.7%), P4-4 min (+18.4%), and P8-2 min (+18%) (P < 0.01). A strong correlation (R = 0.68) between the rate of W ' depletion and W ' recovery was found (P = 0.001).
Conclusion: This study demonstrated that both the work and recovery characteristics of a prior exhaustive exercise bout can affect the W ' reconstitution. Results revealed a slower W ' reconstitution when the rate of W ' depletion was slower as well. Furthermore, it was shown that the current W '(BAL) model underestimates actual W ' reconstitution, especially after shorter recovery.},
  author       = {Caen, Kevin and Bourgois, Jan and Bourgois, Gil and Van der Stede, Thibaux and Vermeire, Kobe and Boone, Jan},
  issn         = {0195-9131},
  journal      = {MEDICINE AND SCIENCE IN SPORTS AND EXERCISE},
  keywords     = {CRITICAL POWER,W ',RECONSTITUTION,RECOVERY,MODELING,MUSCLE METABOLIC-RESPONSES,PRIOR HEAVY EXERCISE,CRITICAL POWER,EXHAUSTIVE EXERCISE,INTENSITY EXERCISE,DURATION,PERFORMANCE,PARAMETERS,HUMANS,MODEL},
  language     = {eng},
  number       = {8},
  pages        = {1745--1751},
  title        = {The reconstitution of W' depends on both work and recovery characteristics},
  url          = {http://dx.doi.org/10.1249/MSS.0000000000001968},
  volume       = {51},
  year         = {2019},
}

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