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Exercise and Cardiovascular Response01:20

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Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
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Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
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Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans
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Physiological responses after two different CrossFit workouts.

Lucas D M Forte1, Yago G C Freire1, Josinaldo S D S Júnior1

  • 1Health Sciences Center, Physical Education Department, Federal University of Paraíba, João Pessoa, Brazil.

Biology of Sport
|March 21, 2022
PubMed
Summary
This summary is machine-generated.

This study compared physiological responses to two CrossFit workout structures. While cardiovascular responses were similar, "round for time" workouts showed higher blood lactate, indicating greater reliance on glycolytic metabolism.

Keywords:
Blood lactateCardiovascular responsesHigh-intensity exercisePhysiological responses

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Area of Science:

  • Exercise Physiology
  • Sports Science
  • Metabolic Responses

Background:

  • CrossFit workouts of the day (WODs) vary in structure, impacting physiological demands.
  • Understanding these differences is crucial for optimizing training and performance.
  • Previous research has not fully elucidated the distinct physiological responses between different WOD structures.

Purpose of the Study:

  • To investigate and compare the acute physiological responses to two distinct CrossFit WOD structures: "as many repetitions as possible" (AMRAP) and "round for time" (RFT).
  • To analyze differences in blood lactate, heart rate, and blood pressure between the two WOD formats.
  • To determine the metabolic demands associated with different CrossFit training session structures.

Main Methods:

  • Participants (11 men, 12 women) were divided into two groups, one performing the AMRAP "Cindy" WOD and the other the RFT "Open 18.4" WOD.
  • Physiological markers including blood lactate (LAC), heart rate (HR), systolic blood pressure (SBP), and diastolic blood pressure (DBP) were measured pre-exercise, immediately post-exercise, and 30 minutes post-exercise.
  • Statistical analysis using two-way ANOVA was employed to compare responses between the groups.

Main Results:

  • Both WODs similarly elevated heart rate.
  • The RFT "Open 18.4" significantly increased SBP post-exercise compared to rest, with no difference observed in the AMRAP "Cindy" group.
  • The RFT group exhibited significantly higher blood lactate levels immediately post-exercise and 30 minutes post-exercise compared to the AMRAP group.

Conclusions:

  • While acute cardiovascular responses were comparable between the studied AMRAP and RFT CrossFit WODs, metabolic demands differed.
  • The RFT structure appears to place a greater reliance on glycolytic metabolism, as evidenced by elevated blood lactate levels.
  • These findings suggest that WOD structure influences metabolic outcomes, irrespective of athlete gender.