Date of Award
Master of Science in Health, Human Performance, and Recreation (MSHHPR)
Health, Human Performance, and Recreation
Purpose: The purpose of this investigation is to determine the effectiveness of heart-rate variability as a monitoring and intensity-prescription tool for CrossFit.
Methods:Twenty-five recreational trained males and females were randomized into two groups, experimental (EXP) and control (CON) prior to the intervention. Prior to any assessments, all participants established a 14-day baseline period for their morning heart-rate variability. Both groups underwent pre-training assessment for work capacity, whole body strength, maximal oxygen consumption and body composition. All participants followed a 21-day training program followed by another week of testing, repeated twice. During the training, a rolling seven-day average of heart-rate variability was used to prescribed based upon windows set at .5 and 1 SD of the baseline average with the windows adjusting after the first training block. EXP would have full-intensity, moderated-intensity, or active recovery training sessions based upon morning heart-rate variability while CON always trained at fullintensity/effort.
Results: There were no significant group by time interactions for any variables, but there was a significantly different amount of training sessions at a full intensity. All participants saw increases performance outcomes, while seeing significant improvement in physical work capacity, and EXP seeing positive outcomes in body composition measures.
Conclusion:Heart-rate variability is an effective tool for monitoring participants and prescribing-intensity in CrossFit Training.
Drake, Nicholas B., "EFFECTS OF HEART RATE VARIABILITY-GUIDED PRESCRIPTION ON THE PHYSIOLOGICALOUTCOMES OF CROSSFIT TRAINING" (2018). Electronic Thesis Collection. 245.