Physiological and Fitness Adaptations after Eight Weeks of High-Intensity Functional Training in Physically Inactive Adults

Brisebois, Matthew F; Rigby, Brandon R; Nichols, David

doi:10.3390/sports6040146

Cited by 38 publications

(51 citation statements)

References 39 publications

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“…The mean HR for 20 min was above 93% of HRmax, and significantly higher in the high intensity treadmill training. This HR response meets the intensity recommendations from ACSM to improve cardiorespiratory fitness [15] and previous research reported modest improvements in aerobic fitness after some weeks of high-intensity functional training [16,17]. Although CrossFit ® includes a dynamic of movements with elevated repetitions and high intensity, training protocols have distinct duration, from shorter protocols of only some minutes (2 to 8 min) to longer sessions (20 to 30 min), which may directly affect cardiovascular, metabolic, and rating of perceived exertion responses.…”

Section: Introductionsupporting

confidence: 78%

Lactate, Heart Rate and Rating of Perceived Exertion Responses to Shorter and Longer Duration CrossFit® Training Sessions

Tibana

Sousa²,

Prestes

et al. 2018

JFMK

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The aim of this study was to analyze blood lactate concentration (LAC), heart rate (HR), and rating perceived exertion (RPE) during and after shorter and longer duration CrossFit® sessions. Nine men (27.7 ± 3.2 years; 11.3 ± 4.6% body fat percentage and training experience: 41.1 ± 19.6 months) randomly performed two CrossFit® sessions (shorter: ~4 min and longer: 17 min) with a 7-day interval between them. The response of LAC and HR were measured pre, during, immediately after, and 10, 20, and 30 min after the sessions. RPE was measured pre and immediately after sessions. Lactate levels were higher during the recovery of the shorter session as compared with the longer session (shorter: 15.9 ± 2.2 mmol/L/min, longer: 12.6 ± 2.6 mmol/L/min; p = 0.019). There were no significant differences between protocols on HR during (shorter: 176 ± 6 bpm or 91 ± 4% HRmax, longer: 174 ± 3 bpm or 90 ± 3% HRmax, p = 0.387). The LAC was significantly higher throughout the recovery period for both training sessions as compared to pre-exercise. The RPE was increased immediately after both sessions as compared to pre-exercise, while there was no significant difference between them (shorter: 8.7 ± 0.9, longer: 9.6 ± 0.5; p = 0.360). These results demonstrated that both shorter and longer sessions induced elevated cardiovascular responses which met the recommendations for gains in cardiovascular fitness. In addition, both training sessions had a high metabolic and perceptual response, which may not be suitable if performed on consecutive days.

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Section: Introductionsupporting

confidence: 78%

Lactate, Heart Rate and Rating of Perceived Exertion Responses to Shorter and Longer Duration CrossFit® Training Sessions

Tibana

Sousa²,

Prestes

et al. 2018

JFMK

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“…This time-dependent data on the improvement of biological parameters can evolve especially when taking into consideration nature, duration, and intensity. Several studies have reported the benefits of regular physical and sports activities for times of 12 weeks or less (Brisebois et al, 2018;Murawska-Cialowicz et al, 2015;Park et al, 2019;Posnakidis et al, 2020;Sun et al, 2019). These studies, which are mostly Caucasian, use a high-intensity functional training (HIFT) program.…”

Section: Discussionmentioning

confidence: 99%

“…Concerning blood pressure parameters, men's SBP decreased after 12 weeks of training. Reductions in blood pressure are generally reported in longitudinal studies on the benefits of physical and sports activities in hypertensive, normotensive, overweight, and normal-weight individuals (Brisebois et al, 2018;Whelton et al, 2002). A study of the longitudinal effects of "high-intensity functional training" showed a significant reduction in diastolic blood pressure (DBP) in men, while there was no change in the PAS in both men and women (Brisebois et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

“…Reductions in blood pressure are generally reported in longitudinal studies on the benefits of physical and sports activities in hypertensive, normotensive, overweight, and normal-weight individuals ( Brisebois et al, 2018 ; Whelton et al, 2002 ). A study of the longitudinal effects of “high-intensity functional training” showed a significant reduction in diastolic blood pressure (DBP) in men, while there was no change in the PAS in both men and women ( Brisebois et al, 2018 ). However, a meta-study showed that the combination of aerobic and anaerobic exercises increased DBP more, while the SPB remained unchanged ( Cornelissen and Smart, 2013 ).…”

Section: Discussionmentioning

confidence: 99%

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Effect of a 12-week training program on the anthropometric and physiological profiles of some participants registered in a fitness center in Douala, Cameroon

Ndemba¹,

Ayina²,

Guessogo³

et al. 2020

J Exerc Rehabil

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Fitness centers are remarkably abundant in Cameroon. The aim of this work was to assess the effects of a 12-week training program on the anthropometric and physiological profiles of some participants in a fitness center. A total of 86 participants (40 from the experimental group and 46 from the control group) with age ranging from 17 to 53 years were subjected to pre-and posttraining assessments of, anthropometric parameters, physiological parameters, and performance. Anthropometric parameters (weight, height, body mass index [BMI], waist circumference [WC]) and blood pressure (diastolic blood pressure, systolic blood pressure [SBP]) were measured according to standard protocols. Heart rate was recorded using a heart rate monitor. Cardiorespiratory fitness (maximal oxygen uptake or VO2peak) was estimated by the 20-multistage shuttle run test. All the data was collected twice within 12 weeks. Weight, BMI, and WC did not show any significant variation (P> 0.05) after a 12-week training program. VO2peak increase was insignificant (P> 0.05) higher in men (7.5%, P= 0.06), compared to women (5.4%, P= 0.4). We noticed a significant reduction (P= 0.002) in the SBP of men. Significant increase of HR max was found in women. There was an improvement of 13.7% in the VO2peak of the participants who did not consume alcohol. These results demonstrate the slight benefits of a 12week training program on health. The weight characteristics of the participants and lifestyle may play an important role in these interactions.

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“…Functional-Fitness has been increasingly growing in popularity as it is considered a more enjoyable form of exercise when compared with traditional aerobic and resistance training [17]. In addition, it is done in a shorter period of time inducing similar positive outcomes reported in strength [18], performance [19] and body composition [20] compared to longer duration more traditional type resistance and aerobic type workouts. To the best of our knowledge, this is the first study designed to examine RPE as a viable tool for controlling the intensity of a metabolic training session in trained men.…”

Section: Correlations Between Rpe and Physiological Variablesmentioning

confidence: 99%

Is Perceived Exertion an Useful Indicator of Metabolic and Cardiovascular Response to Metabolic Conditioning of Functional-Fitness Session? A Randomized Controlled Trial

R¹,

Sousa²,

Prestes³

et al. 2019

Preprint

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The purpose of this study was to assess if self-regulation of intensity based on rating of perceived exertion (RPE) is a reliable method to control the intensity of metabolic conditioning of functional-fitness session. In addition, the relationship between RPE and changes in heart rate and lactate responses was also analyzed. Eight male participants (age 28.1 ± 5.4 years; body mass 77.2 ± 4.4kg; VO2max: 52.6 ± 4.6 mL·(kg·min)−1) completed three randomly sessions (5 to 7 days apart) under different conditions: (1) all-out (ALL); (2) self-regulation of intensity based on a RPE of 6 (hard) on the Borg CR-10 scale (RPE6); and (3) a control session. Rate of perceived exertion, LAC and HR response were measured pre, during and immediately after the sessions. The RPE and LAC during the ALL-OUT sessions were higher (p ≤ 0.05) than the RPE6 and control sessions for all the analyzed time points during the sessions. Regarding HR, the 22 min area under the curve of HR during ALL-OUT and RPE6 sessions were significantly higher (p ≤ 0.05) than the control session. The average number of repetitions was lower (p ≤ 0.05) for the RPE6 session (190.5 ± 12.5 repetitions) when compared to the ALL session (214.4 ± 18.6 repetitions). There was a significant correlation between RPE and LAC (p = 0.001; r = 0.76; very large) and number of repetitions during the session (p = 0.026; r = 0.55; large). No correlation was observed between RPE and HR (p = 0.147; r = 0.380). These results indicate that self-regulation of intensity of effort based on RPE may be a useful tool to control exercise intensity during a metabolic conditioning session of functional-fitness.

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Physiological and Fitness Adaptations after Eight Weeks of High-Intensity Functional Training in Physically Inactive Adults

Cited by 38 publications

References 39 publications

Lactate, Heart Rate and Rating of Perceived Exertion Responses to Shorter and Longer Duration CrossFit® Training Sessions

Lactate, Heart Rate and Rating of Perceived Exertion Responses to Shorter and Longer Duration CrossFit® Training Sessions

Effect of a 12-week training program on the anthropometric and physiological profiles of some participants registered in a fitness center in Douala, Cameroon

Is Perceived Exertion an Useful Indicator of Metabolic and Cardiovascular Response to Metabolic Conditioning of Functional-Fitness Session? A Randomized Controlled Trial

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