title: Use of heart rate variability in monitoring stress and recovery in judo athletes.
abstract: The main objective of this study was to examine the effect of different judo training loads on heart rate variability (HRV) measurements, to determine if they can be used as valid indicators in monitoring stress and recovery in judo athletes. Fourteen male national-standard judo athletes were randomly divided into 2 groups, and each group followed a different type of training, namely, a high training load (HTL) and a moderate training load program (MTL). Data collection included HRV measurements, a Recovery Stress Questionnaire for athletes (RESTQ-SPORT), and strength measurements, 4 weeks before and after the training program. The HTL group had lower square root of the mean squared difference of successive RR intervals, very low frequency, high frequency, short-term variability, short-range scaling exponents, general recovery, sport-specific recovery, general stress, maximum strength, maximum power, and higher low/high frequency ratio at posttest compared with pretest (p ≤ 0.05). The HTL group showed lower short-range and long-range scaling exponents, general recovery, sport-specific recovery, and higher general stress than the MTL group in posttest measurements (p ≤ 0.05). In conclusion, judo athletes enrolled in an HTL program showed an imbalance of the autonomic nervous system with decreased vagal modulation, together with a decrease in strength parameters, higher markers for stress, and a lower perception of recovery.
authors.affiliation: 1Faculty of Psychology, Education Sciences and Sport Blanquerna, Ramon Llull University, Barcelona, Spain; 2Department of Physiology, University of Barcelona, Barcelona, Spain; 3Department of Physiotherapy, University of Valencia, Valencia, Spain; 4Department of Physical Activity and Sports, University of Victoria, Barcelona, Spain; and 5Department of Physical Education and Sports, University of Valencia, Valencia, Spain.
authors.forename: José
authors.initials: J
authors.lastname: Morales
authors.forename: Juan M
authors.initials: JM
authors.lastname: Alamo
authors.forename: Xavier
authors.initials: X
authors.lastname: García-Massó
authors.forename: Bernat
authors.initials: B
authors.lastname: Buscà
authors.forename: Jose L
authors.initials: JL
authors.lastname: López
authors.forename: Pilar
authors.initials: P
authors.lastname: Serra-Añó
authors.forename: Luís-Millán
authors.initials: LM
authors.lastname: González
mesh_terms: D018737:Hand Strength / Q000502:physiology; D006339:Heart Rate; D006801:Humans; D008297:Male; D016139:Martial Arts / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology; D064797:Physical Conditioning, Human / Q000379:methods / Q000502:physiology*; D020127:Recovery of Function / Q000502:physiology*; D013312:Stress, Physiological; D011795:Surveys and Questionnaires; D055815:Young Adult