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Korkmaz Dayican D, Ulker Eksi B, Yigit S, Utku Umut G, Ozyurek B, Yilmaz HE, Akinci B. Immediate Effects of High-Intensity Blood Flow Restriction Training on Muscle Performance and Muscle Soreness. RESEARCH QUARTERLY FOR EXERCISE AND SPORT 2024:1-10. [PMID: 39186458 DOI: 10.1080/02701367.2024.2389902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 08/03/2024] [Indexed: 08/28/2024]
Abstract
Purpose: The aim was to investigate the immediate effects of high-intensity resistance training with blood flow restriction (HIRT-BFR) on rectus femoris (RF) muscle activity, reaction time, muscular performance, and delayed onset muscle soreness (DOMS) in healthy young adults. Methods: Twenty-four healthy young adults were randomized into the HIRT-BFR group or HIRT group. Both groups performed a single session of training with 80% of 1RM, 8 repetitions, 2 sets, and 3 minutes rest to RF muscle. The activity and reaction time of the dominant extremity RF muscle were evaluated by superficial electromyography (sEMG), muscular performance by single-leg squat test, and DOMS by the Visual Analog Scale. Results: Single-leg squat performance was significantly increased in HIRT-BFR (p = .001) and HIRT group (p = .04). Additionally, in HIRT group resting average (p = .03), resting maximal voluntary contraction % (p = .04), and relaxation minimum (p = .02) values of RF were significantly increased. DOMS level decreased significantly in HIRT-BFR (p < .001) and HIRT group (p = .019). The differences were similar in the groups for sEMG parameters, muscle performance, and DOMS level. Conclusion: We observed that HIRT-BFR and HIRT were similar in terms of muscle activation, reaction time, muscular performance of the RF, and DOMS level.Trial registration number: This study is registered at www.clinicaltrails.gov (NCT05274542).
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Chnini Z, Salem A, Trabelsi K, Ammar A, Souissi N, Chtourou H. Light load jump squat and plyometric training enhance jumping, sprinting, change of direction, and balance performance of male soccer players (U-19): a randomized controlled trial. J Sports Med Phys Fitness 2024; 64:719-727. [PMID: 38841726 DOI: 10.23736/s0022-4707.24.15368-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
BACKGROUND In sports science, optimizing athletic performance is pursued through an emerging approach that combined light-loaded squat (LLS) training and plyometric jump training (PJT), targeting strength, power, and neuromuscular adaptations, particularly beneficial for the dynamic demands of youth soccer. The aim of this study was to examine the effect of a combined LLS training and PJT program on athletic performance and balance in youth soccer players. METHODS Thirty-two male players were randomly assigned to two groups: an experimental group (EG: N.=16; age: 18.56±0.51 years; body mass: 66.87±4.99 kg; height: 1.78±0.07 m) and a control group (CG: N.=16; age: 18.68±0.47 years; body mass: 67.93±4.58 kg; height: 1.77±0.07 m) from the same U19 team of a professional club voluntarily participated in the study. Squat jump (SJ), countermovement jump (CMJ), horizontal jump (HJ), drop jump (DJ), 30 m sprint (30 mS), change of direction ability (4×5 m sprint test [S 4×5 m]) and static balance (the stork balance) performance tests were carried out in the week before and the week after the 8 weeks with combined LLS and PJT period. The two-way analysis of variance (ANOVA) was used for all tests. RESULTS The results of this study show that the EG had significantly greater improvements than the CG in all tests (all P<0.001). Also, EG experienced higher performance between preintervention and post intervention measures (all P<0.05). There was no significant difference between the two groups in the 4×5mS performance (P>0.05). CONCLUSIONS We conclude that coaches may be advised to use the combined LLS and PJT since it is as effective as traditional methods and perfect for sports and activities requiring fast, explosive movements during the in-season period than regular training.
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Affiliation(s)
- Zouhaier Chnini
- Higher Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia
- Physical Activity, Sport, and Health, UR18JS01, National Observatory of Sport, Tunis, Tunisia
| | - Atef Salem
- Higher Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia -
- Physical Activity, Sport, and Health, UR18JS01, National Observatory of Sport, Tunis, Tunisia
| | - Khaled Trabelsi
- Higher Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia
- Research Laboratory: Education, Motricité, Sport et Santé (EM2S), LR19JS01, High Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia
| | - Achraf Ammar
- Department of Training and Movement Science, Institute of Sport Science, Johannes Gutenberg-University Mainz, Mainz, Germany
- Research Laboratory, Molecular Bases of Human Pathology, LR19ES13, Faculty of Medicine of Sfax, Sfax, Tunisia
| | - Nizar Souissi
- Physical Activity, Sport, and Health, UR18JS01, National Observatory of Sport, Tunis, Tunisia
| | - Hamdi Chtourou
- Higher Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia
- Physical Activity, Sport, and Health, UR18JS01, National Observatory of Sport, Tunis, Tunisia
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Gawel D, Jarosz J, Trybulski R, Krzysztofik M, Makar P, Vieira JG, Trybek G, Wilk M. Effects of different ischemic pressures on bar velocity during the bench press exercise: A randomized crossover trial. Biol Sport 2024; 41:89-96. [PMID: 38952908 PMCID: PMC11167470 DOI: 10.5114/biolsport.2024.133004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 09/27/2023] [Accepted: 10/29/2023] [Indexed: 07/03/2024] Open
Abstract
The main objective of this study was to evaluate the effects of different ischemic pressures applied during rest intervals on bar velocity during the bench press exercise. 10 resistance-trained males (age = 23.2 ± 2.7 years; body mass = 83.9 ± 9 kg; body height = 181 ± 5.2 cm; bench press 1 repetition maximum (1RM) = 125 ± 16.4 kg; training experience = 5.4 ± 3.4 years) participated in the study. During 4 experimental sessions, following a randomized crossover design, the subjects performed 5 sets of 3 repetitions of the bench press exercise with a load of 60% 1RM under conditions: with ischemia (50% or 80% of arterial occlusion pressure), with SHAM ischemia (20 mmHg) and without ischemia (control condition). For the ischemic conditions cuffs were applied before each set for 6.5 min and released 30 s before the start of the set as reperfusion (6.5 min ischemia + 0.5 min reperfusion). In the control condition, ischemia was not applied. The two-way repeated measures ANOVA showed no significant condition × set interaction for mean bar velocity (MV; p = 0.17) and peak bar velocity (PV; p = 0.66). There was also no main effect of condition for MV (p = 0.58) and PV (p = 0.61). The results indicate that ischemic or SHAM treatment (6.5 minutes ischemia or SHAM + 30 s reperfusion) does not affect mean and peak bar velocity during the bench press exercise regardless of the applied pressure.
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Affiliation(s)
- Dawid Gawel
- Institute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education in Katowice, Poland
| | - Jakub Jarosz
- Institute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education in Katowice, Poland
| | - Robert Trybulski
- Department of Medical Sciences, The Wojciech Korfanty School of Economics, Katowice, Poland
| | - Michal Krzysztofik
- Institute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education in Katowice, Poland
| | - Piotr Makar
- Faculty of Physical Education, Gdansk University of Physical Education and Sport, Gdansk, Poland
| | - João Guilherme Vieira
- Postgraduate Program in Physical Education, Federal University of Juiz de Fora (UFJF), Juiz de Fora, Brazil
- Strength Training Research Laboratory, Federal University of Juiz de Fora (UFJF), Brazil
| | - Grzegorz Trybek
- Faculty of Physical Education, Gdansk University of Physical Education and Sport, Gdansk, Poland
- Department of Oral Surgery, Pomeranian Medical University, Szczecin, Poland
| | - Michal Wilk
- Institute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education in Katowice, Poland
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Moreno EN, Figueroa EC, Heath AW, Buckner SL. An examination of acute physiological and perceptual responses following blood flow restriction exercise using a traditional research device or novel, automated system. Physiol Meas 2024; 45:065007. [PMID: 38838705 DOI: 10.1088/1361-6579/ad548c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 06/05/2024] [Indexed: 06/07/2024]
Abstract
Objective. To compare the acute physiological and perceptual responses to blood flow restriction (BFR) exercise using a traditional research device or novel, automated system.Methods. Forty-four resistance trained individuals performed four sets of unilateral elbow flexion exercise (30% one-repetition maximum) to volitional failure using two distinct restrictive devices [SmartCuffs PRO BFR Model (SMARTCUFF), Hokanson E20 Rapid Inflation device (HOKANSON)] and with two levels of BFR [40% limb occlusion pressure (LOP), 80% LOP]. Blood pressure (BP), muscle thickness (MT), and isometric strength (ISO) were assessed prior to and following exercise. Perceptual responses [ratings of perceived exertion (RPE), discomfort] were assessed prior to exercise and following each exercise set.Main results. Data are displayed as means (SD). Immediately following exercise with 40% LOP, there were no statistical differences between devices for BP, MT, and ISO. However, only following Set 1 of exercise, RPE was greater with SMARTCUFF compared to HOKANSON (p< 0.05). In addition, only following Set 2 of exercise, discomfort was greater with HOKANSON compared to SMARTCUFF (p< 0.001). Immediately following exercise with 80% LOP, there were no statistical differences between devices for BP, MT, and ISO. However, only following Set 4 of exercise, RPE was greater with HOKANSON compared to SMARTCUFF (p< 0.05). In addition, following all exercise sets, discomfort was greater with HOKANSON compared to SMARTCUFF (p< 0.001). For repetitions completed with 40% LOP there were no statistical differences between SMARTCUFF and HOKANSON across any exercise sets. For repetitions completed with 80% LOP there were no statistical differences between SMARTCUFF and HOKANSON across Set 1 of exercise (p= 0.34), however, for Sets 2-4 of exercise, significantly greater number of repetitions were completed during SMARTCUFF than HOKANSON.Significance. The present study provides valuable insight into the efficacy of a novel, automated BFR system (SMARTCUFF) eliciting comparable acute physiological responses to BFR exercise and in some cases favorable perceptual responses when compared to a traditional research device (HOKANSON).
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Affiliation(s)
- Enrique N Moreno
- USF Muscle Laboratory, Exercise Science Program, University of South Florida, Tampa, FL, United States of America
| | - Elias C Figueroa
- USF Muscle Laboratory, Exercise Science Program, University of South Florida, Tampa, FL, United States of America
| | - Andrew W Heath
- USF Muscle Laboratory, Exercise Science Program, University of South Florida, Tampa, FL, United States of America
| | - Samuel L Buckner
- USF Muscle Laboratory, Exercise Science Program, University of South Florida, Tampa, FL, United States of America
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Motowidło J, Stronska-Garbien K, Bichowska-Pawęska M, Kostrzewa M, Zając A, Ficek K, Drozd M. Effect of Step Load Based on Time under Tension in Hypoxia on the ACL Pre-Operative Rehabilitation and Hormone Levels: A Case Study. J Clin Med 2024; 13:2792. [PMID: 38792333 PMCID: PMC11122198 DOI: 10.3390/jcm13102792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 04/29/2024] [Accepted: 05/02/2024] [Indexed: 05/26/2024] Open
Abstract
The aim of the study was to determine the effect of step load in hypoxia on the effectiveness of preoperative rehabilitation (PR) and hormone levels based on a case study. Introduction: We assessed the impact of variables such as rate of movement and time under tension (TUT) in normobaric hypoxia on the levels of growth hormone (GH), insulin-like growth factor 1 (IGF-1), and erythropoietin (EPO). Additionally, the impact of step load on the hypertrophy and strength of knee extensors and flexors was assessed. Methods: The work uses a case study, the research subject of which was a 23-year-old female professional handball player. The tests included an isokinetic assessment of the peak torque of knee extensors and flexors as well as body composition analysis. Results: The results showed a more than (10.81-fold) increase in GH after the microcycle with time under tension (TUT). The deficit between the lower limbs was also reduced. Conclusions: Using a hypoxic environment based on an appropriate altitude, combined with changes such as a short rest break between sets and a controlled tempo of movement with an eccentric phase, TUT may offer an alternative to the PR process, especially among athletes who care about fast RTS.
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Affiliation(s)
- Joanna Motowidło
- Department of Sports Training, Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education, 40-065 Katowice, Poland; (K.S.-G.); (M.K.); (A.Z.); (K.F.)
| | - Katarzyna Stronska-Garbien
- Department of Sports Training, Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education, 40-065 Katowice, Poland; (K.S.-G.); (M.K.); (A.Z.); (K.F.)
| | - Marta Bichowska-Pawęska
- Faculty of Physical Education, Gdansk University of Physical Education and Sport, 80-336 Gdansk, Poland;
| | - Maciej Kostrzewa
- Department of Sports Training, Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education, 40-065 Katowice, Poland; (K.S.-G.); (M.K.); (A.Z.); (K.F.)
| | - Adam Zając
- Department of Sports Training, Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education, 40-065 Katowice, Poland; (K.S.-G.); (M.K.); (A.Z.); (K.F.)
| | - Krzysztof Ficek
- Department of Sports Training, Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education, 40-065 Katowice, Poland; (K.S.-G.); (M.K.); (A.Z.); (K.F.)
| | - Miłosz Drozd
- Department of Sports Training, Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education, 40-065 Katowice, Poland; (K.S.-G.); (M.K.); (A.Z.); (K.F.)
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Latocha A, Jarosz J, Helbin J, Krzysztofik M. Will Music Give Me Power? Effects of Listening to Music during Active and Passive Rest Intervals on Power Output during Resistance Exercise. J Funct Morphol Kinesiol 2024; 9:32. [PMID: 38390932 PMCID: PMC10885097 DOI: 10.3390/jfmk9010032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 02/05/2024] [Accepted: 02/08/2024] [Indexed: 02/24/2024] Open
Abstract
The study aimed to evaluate the impact of listening to preferred music during active/passive rest on power output and heart rate in barbell squats (BS) and bench presses (BP). Fifteen participants (13 males and 2 females), moderately resistance trained, were engaged in four randomized experimental sessions with varying rest intervals (active/passive) and music presence (listening or not). Each session involved three sets of three repetitions of BS and BP at a 50% one-repetition maximum. ANOVA showed a significant main effect of the set for BP relative mean and peak power output (p < 0.001; both). The post hoc comparisons indicated a significantly higher BP relative mean and peak power output in set_2 (p < 0.001; effect size [ES] = 0.12 and p < 0.001; ES = 0.10) and set_3 (p < 0.001; ES = 0.11 and p = 0.001; ES = 0.16) in comparison to set_1. Moreover, a main effect of the set indicating a decrease in BS relative peak power output across sets was observed (p = 0.024) with no significant differences between sets. A significantly higher mean heart rate during active rest in comparison to passive rest was observed (p = 0.032; ES = 0.69). The results revealed no significant effect of listening to music on relative power output and heart rate during BS and BP.
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Affiliation(s)
- Agata Latocha
- Nutrition and Sports Performance Research Group, The Jerzy Kukuczka Academy of Physical Education in Katowice, 40-065 Katowice, Poland
| | - Jakub Jarosz
- Nutrition and Sports Performance Research Group, The Jerzy Kukuczka Academy of Physical Education in Katowice, 40-065 Katowice, Poland
- Institute of Sports Sciences, The Jerzy Kukuczka Academy of Physical Education in Katowice, Mikołowska 72a, 40-065 Katowice, Poland
| | - Jonatan Helbin
- Nutrition and Sports Performance Research Group, The Jerzy Kukuczka Academy of Physical Education in Katowice, 40-065 Katowice, Poland
| | - Michał Krzysztofik
- Nutrition and Sports Performance Research Group, The Jerzy Kukuczka Academy of Physical Education in Katowice, 40-065 Katowice, Poland
- Institute of Sports Sciences, The Jerzy Kukuczka Academy of Physical Education in Katowice, Mikołowska 72a, 40-065 Katowice, Poland
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Li R, Chee CS, Kamalden TF, Ramli AS, Yang K. Effects of blood flow restriction training on sports performance in athletes: a systematic review with meta-analysis. J Sports Med Phys Fitness 2024; 64:55-65. [PMID: 37902798 DOI: 10.23736/s0022-4707.23.15220-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2023]
Abstract
INTRODUCTION Blood flow restriction training (BFRT) is an effective training method to improve sports performance in healthy athletes. Nevertheless, a systematic review with meta-analysis regarding how BFRT affects sports performance in athletes is still lacking. Consequently, the study attempted to expand and consolidate the prior studies regarding the effect of BFRT on technical and physical performance in athletes. EVIDENCE ACQUISITION This study was based on PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyzes) statement guidelines for a systematic review of the academic databases Scopus, Web of Science, PubMed, EBSCOhost (SportDiscus), and Google Scholar. The PEDro scale was used to assess the methodological quality of the included publications, which ranged from moderate to high quality. The systematic review protocol was registered on inplasy.com (INPLASY202380049). EVIDENCE SYNTHESIS Out of 249 studies identified, 93 articles were evaluated as eligible, and after the screening, 18 studies were finally included in this systematic review. Meta-analysis results showed a significant enhancement on vertical jump height in the BFRT group compared to the control group (SMD=1.39, 95% CI=0.30-2.49, P=0.01). BFRT was able to significantly increase maximal oxygen uptake (SMD=1.65, 95% CI=0.56-2.74, P<0.01). While no significant improvement in sprint time was observed (SMD= -0.18, 95% CI=-1.18-0.82, P=0.115). CONCLUSIONS The finding suggests that BFRT is beneficial to athletes as this training method can be effective in enhancing physical and technical performance in athletes. Nevertheless, further analysis needs to be conducted to fully determine the effectiveness of the moderators of the intervention on sports performance.
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Affiliation(s)
- Rui Li
- Department of Sport Studies, Faculty of Educational Studies, Putra Malaysia University, Selangor, Malaysia
| | - Chen S Chee
- Department of Sport Studies, Faculty of Educational Studies, Putra Malaysia University, Selangor, Malaysia -
| | - Tengku F Kamalden
- Department of Sport Studies, Faculty of Educational Studies, Putra Malaysia University, Selangor, Malaysia
| | - Alif S Ramli
- Department of Sport Studies, Faculty of Educational Studies, Putra Malaysia University, Selangor, Malaysia
| | - Kun Yang
- Department of Sport Studies, Faculty of Educational Studies, Putra Malaysia University, Selangor, Malaysia
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Wang J, Liu H, Jiang L. The effects of blood flow restriction training on PAP and lower limb muscle activation: a meta-analysis. Front Physiol 2023; 14:1243302. [PMID: 38028795 PMCID: PMC10666059 DOI: 10.3389/fphys.2023.1243302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 10/20/2023] [Indexed: 12/01/2023] Open
Abstract
Objective: This study aims to systematically evaluate the effects of blood flow restriction (BFR) training on lower limb muscle activation and post-activation potentiation (PAP) in athletes through a meta-analysis and discuss methods to improve instant muscle strength so as to provide a reference for training in this field. Methods: Randomized controlled trials (RCTs) that examined the impact of BFR training on muscle activation and PAP were gathered through database searches, such as CNKI, Wanfang, Web of Science, PubMed, and others. The Cochrane risk of bias tool was used to include and exclude literature. Quality evaluation and statistical analysis were conducted using ReviewManager 5.3 software, STATA 16.0, and other software programs. The sensitivity analysis and funnel plots were employed to assess result stability and publication bias. Results: In total, 18 literature studies were included with a total of 267 subjects. The meta-analysis showed that BFR could significantly improve the RMS value of lower limb muscles [SMD = 0.98, 95% CI (0.71, 1.24), and p < 0.00001]. BFR had a significant effect on the immediate explosive power of the lower limbs [SMD = 0.28, 95% CI (0.02, 0.53), and p = 0.03], but the heterogeneity was obvious (I 2 = 51%). The subgroup analysis showed that different training methods may be influencing factors that lead to the heterogeneity between studies. The measurement indexes were the counter movement jump (CMJ) [SMD = 0.45, 95% CI (0.20, 0.69), and p = 0.0004], training mode to overcome body weight [SMD = 0.57, 95% CI (0.33, 0.82), and p < 0.00001], and compressive strength of 40%-60% arterial occlusion pressure (AOP) [SMD = 0.57, 95% CI (0.31, 0.83), and p < 0.0001], which reached the maximum effect and was statistically significant. Conclusion: BFR training can induce lower extremity muscle activation and PAP. Combining self-weight training with BFR exercises set at 40%-60% AOP appears to be particularly effective in inducing PAP, especially for enhancing CMJ. Furthermore, combining body-weight training with BFR is considered an effective warm-up method to improve CMJ. Systematic Review Registration: http://inplasy.com, identifier INPLASY2023100087.
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Affiliation(s)
- Jian Wang
- Department of Physical Education, Ningbo University of Technology, Ningbo, China
| | - Haiyang Liu
- Department of Physical Education, Ningbo University of Technology, Ningbo, China
| | - Lizhu Jiang
- Ningde Vocational and Technical College, Ningde, China
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Faller JM, Thompson B, Sotir S, Ives S. The Acute Impacts of Resistance Training Performed with and without Blood Flow Restriction on Lower Body Muscular Power. INTERNATIONAL JOURNAL OF EXERCISE SCIENCE 2023; 16:1320-1333. [PMID: 38288383 PMCID: PMC10824296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/31/2024]
Abstract
The American College of Sports Medicine recommends resistance training using at least 70% one repetition maximum to improve muscular strength and hypertrophy; however, these intensities may not be safe for all populations. A training technique that has been reported to elicit increases in strength and muscle size uses low intensity resistance training or low load training in combination with blood flow restriction (BFR) to the working muscle. Although the acute effects of BFR on muscle strength and size are well established, the effects of BFR on muscular power are not definitively known. Resistance trained males (n = 14) completed three experimental sessions in which lower body power output and vertical jump height were measured pre and post exercise protocol. The barbell back squat was performed with either low load and blood flow restriction, high load (90% 1 RM, HL), or control (CON). A significant mean difference between pre (M = 46.35 ± 5.61 cm) and post (M = 43.63 ± 4.59 cm) vertical jump heights following 15 repetitions at 20% 1 RM with BFR was observed (p = 0.034), but not with HL or a CON. A decrement in vertical jump height was experienced after an acute bout of BFR with low load resistance exercise. Low load resistance exercise with BFR or high intensity resistance exercise may not be beneficial as part of a warm-up to acutely enhance vertical jump or power output.
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Affiliation(s)
- Justin M Faller
- Department of Exercise Science and Athletic Training, Springfield College, Springfield, MA, United States
- Kinesiology, Sport Studies, & Physical Education, SUNY Brockport, Brockport, NY, United States
| | - Brian Thompson
- Department of Exercise Science and Athletic Training, Springfield College, Springfield, MA, United States
| | - Susan Sotir
- Department of Exercise Science and Athletic Training, Springfield College, Springfield, MA, United States
- Breakthrough Performance Coaching LLC, Ipswich, MA, United States
| | - Stephen Ives
- Department of Health and Human Physiological Sciences, Skidmore College, Saratoga Spring, NY, United States
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Jarosz J, Gaweł D, Krzysztofik M, Zając A, Tsoukos A, Bogdanis GC, Wilk M. Effects of blood flow restriction on mechanical properties of the rectus femoris muscle at rest. Front Physiol 2023; 14:1244376. [PMID: 37664427 PMCID: PMC10469864 DOI: 10.3389/fphys.2023.1244376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 08/08/2023] [Indexed: 09/05/2023] Open
Abstract
Introduction: This study examined the effects of blood flow restriction (BFR) and reperfusion on the mechanical properties of the rectus femoris muscle at rest (frequency and stiffness). Methods: Fourteen trained men (body weight = 81.0 ± 10.3 kg; BMI = 25 ± 3.0 m/kg2; height = 181 ± 4 cm; training experience = 6.0 ± 2.2 years) participated in an experimental session involving their dominant (BFR) and non-dominant leg (control). Muscle mechanical properties were measured using Myoton's accelerometer at the midpoint of the rectus femoris muscle at five time points. In the BFR leg, an 80% arterial occlusion pressure was applied by a cuff for 5 min. No cuff was applied in the control leg. Femoral Myoton measurements were taken from both legs 2 and 4 min after the start of BRF as well as 30 s and 2 min after the end of the occlusion period. Results: The two-way ANOVA revealed a statistically significant interaction effect for stiffness and frequency (p < 0.001; η2 > 0.67). The post hoc analysis showed that both stiffness and frequency increased during BFR compared with rest and then dropped to the resting levels post BFR period. Also, stiffness and frequency were higher than control only during the BFR period, and similar during rest and post BFR. Conclusion: These results indicate that the application of BFR at rest leads to significant changes in mechanical properties of the rectus femoris muscle.
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Affiliation(s)
- Jakub Jarosz
- Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education, Katowice, Poland
| | - Dawid Gaweł
- Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education, Katowice, Poland
| | - Michal Krzysztofik
- Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education, Katowice, Poland
| | - Adam Zając
- Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education, Katowice, Poland
| | - Athanasios Tsoukos
- School of Physical Education and Sport Science, National and Kapodistrian University of Athens, Athens, Greece
| | - Gregory C. Bogdanis
- School of Physical Education and Sport Science, National and Kapodistrian University of Athens, Athens, Greece
| | - Michal Wilk
- Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education, Katowice, Poland
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García-Sillero M, Maroto-Izquierdo S, Galván-García M, Benitez-Porres J, Vargas-Molina S, Jurado-Castro JM. Acute Effects of Blood Flow Restriction Training on Movement Velocity and Neuromuscular Signal during the Back Squat Exercise. J Clin Med 2023; 12:4824. [PMID: 37510938 PMCID: PMC10381307 DOI: 10.3390/jcm12144824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 06/30/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023] Open
Abstract
The aim of this study was to verify the effects of blood flow restriction on movement velocity and muscle activity during the back squat exercise. METHODS Twenty-four university students participated in this study. In two randomized sessions 72 h apart, participants performed a 4-set protocol consisting of 30-15-15-15 repetitions performed at 30% of their one-repetition maximum in the back squat exercise. In both sessions, neuromuscular function was monitored by surface electromyography (EMG) and movement velocity (mean propulsive velocity (MPV), peak concentric velocity (Vmax), and the effort index (EI)). Blood flow restriction (BFR) was applied during exercise in one of the experimental sessions with 80% of full arterial occlusion pressure over lower limbs. RESULTS The BFR condition showed higher (p < 0.05) EI, peak, and rooted mean square normalized EMG in Set 1 compared to Set 2. Similar MPV and Vmax were observed in each set for both the BFR and control conditions. No significant differences were observed between conditions in any set. CONCLUSIONS BFR did not imply changes in neuromuscular performance during low-intensity resistance training, but it might induce greater intra-series velocity loss and less excitation of the muscles involved.
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Affiliation(s)
- Manuel García-Sillero
- Physical Education and Sport, Faculty of Medicine, EADE-University of Wales Trinity Saint David, 29018 Malaga, Spain
| | - Sergio Maroto-Izquierdo
- Department of Health Sciences, European University Miguel de Cervantes (UEMC), 47012 Valladolid, Spain
| | - María Galván-García
- Physical Education and Sport, Faculty of Medicine, EADE-University of Wales Trinity Saint David, 29018 Malaga, Spain
| | - Javier Benitez-Porres
- Physical Education and Sport, Faculty of Medicine, University of Málaga, 29016 Málaga, Spain
| | - Salvador Vargas-Molina
- Physical Education and Sport, Faculty of Medicine, EADE-University of Wales Trinity Saint David, 29018 Malaga, Spain
| | - Jose Manuel Jurado-Castro
- Metabolism and Investigation Unit, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, 14004 Cordoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Ciencias De La Actividad Física y El Deporte, Escuela Universitaria de Osuna (Centro Adscrito a la Universidad de Sevilla), 41640 Osuna, Spain
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Effect of Ischemic Preconditioning on Acute Recovery in Elite Judo Athletes: A Randomized, Single-Blind, Crossover Trial. Int J Sports Physiol Perform 2023; 18:180-186. [PMID: 36638812 DOI: 10.1123/ijspp.2022-0280] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 09/05/2022] [Accepted: 10/17/2022] [Indexed: 01/15/2023]
Abstract
PURPOSE The ischemic preconditioning (IPC) method has been shown to aid the recovery processes; however, no studies have been done to assess its acute recovery use in judo. This study aimed to examine IPC of lower limbs effects on recovery after a judo-specific performance in highly trained male judokas and its applicability during a competition day. METHODS A single-blind, placebo-randomized crossover study was carried out on a sample of 13 elite male judo athletes. They undertook measurements of body composition, judo-specific task (Special Judo Fitness Test), jump performance, handgrip strength, lactate, blood pressure, perceived exertion, and delayed-onset muscle soreness. IPC was applied on the legs and inflated 50 mm Hg above the systolic blood pressure for 5 minutes and repeated 3 times for each leg, with 5 minutes of reperfusion. Two-way analysis of variance with repeated measurements was used to determine changes between interventions and measurement times. Paired-sample t test and 1-way repeated-measures analysis of variance was used to determine the difference among measurement times. Statistical significance was set at P < .05. RESULTS The IPC intervention resulted in (1) decreased heart rate at 30 and 60 minutes during recovery (P = .002; P = .001), (2) better countermovement jump performance at 60 minutes (P = .05), (3) lower perceived-muscle-soreness scores (P = .006), and (4) maintained handgrip strength compared with placebo. CONCLUSIONS The present study revealed that IPC applied to judo athletes following judo-specific exercise resulted in better cardiovascular and neuromuscular recovery and could be a useful tool to enhance recovery during judo competition breaks between preliminaries and final block.
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Acute effects of different external compression with blood flow restriction on force-velocity profile during squat and bench press exercises. Biol Sport 2023; 40:209-216. [PMID: 36636189 PMCID: PMC9806750 DOI: 10.5114/biolsport.2023.112093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 09/02/2021] [Accepted: 12/11/2021] [Indexed: 01/16/2023] Open
Abstract
The aim was to compare the acute effects of bench press (BP) and squat (SQ) exercises with blood flow restriction (BFR) (40%, 60%, 80% and 100% of the complete arterial occlusion pressure (AOP)) and without BFR (CON) on the mean propulsive (VelMED) and maximum (VelMAX) bar velocity. Fourteen healthy, physically active males (age, 23.6 ± 4.1 years; height, 1.85 ± 0.11 m; body weight 85.4 ± 4.1 kg) took part in the study. There was one set for each testing condition (CON, 40%, 60%, 80% and 100%) with 6 repetitions for BP and 6 repetitions for SQ, at 60% of 1RM, and 3 minutes of recovery between sets. The results showed statistically significant differences of the sets with 80% BFR vs. CON (mean difference [MD] = 0.035 m · s-1, p < 0.05, ES = 0.52 [1.02-0.03]) and 100% BFR sets vs. CON (MD = 0.074, p < 0.001, ES = 1.08 [1.79-0.38]) for BP. In the SQ exercise, statistically significant differences were found between 100% BFR vs. CON (DM = 0.031 m · s-1, p < 0.05), vs. 100% BFR 40% (MD = 0.04 m · s-1, p < 0.05). Trend analysis showed a statistically significant linear trend (F[1,9] = 34.9, p < 0.001, F[1,13] = 27.32, p < 0.001) for the VelMED in relation to the different levels of BFR. In conclusion, our results showed that BFR levels above ˜80% AOP (BP) and ˜100% AOP (SQ) produce a VelMED improvement at 60% 1RM.
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Fostiak K, Bichowska M, Trybulski R, Trabka B, Krzysztofik M, Rolnick N, Filip-Stachnik A, Wilk M. Acute Effects of Ischemic Intra-Conditioning on 30 m Sprint Performance. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:12633. [PMID: 36231933 PMCID: PMC9566271 DOI: 10.3390/ijerph191912633] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 09/24/2022] [Accepted: 09/28/2022] [Indexed: 06/16/2023]
Abstract
The present study aimed to evaluate the effects of ischemic intra-conditioning applied during rest intervals on 30 m sprint performance. Thirty-four trained male (n = 12) and female (n = 22) track and field and rugby athletes volunteered to participate in the study (age = 19.6 ± 4 years; training experience = 5.3 ± 1.9 years). In a randomized and counterbalanced order, participants performed six sets of 30 m sprints under three different testing conditions: without ischemic intra-conditioning, and with ischemic intra-conditioning at 60% or 80% arterial occlusion pressure applied bilaterally before the first trial of the sprint and during the rest periods between all sprint trials. During experimental sessions, subjects perform 6 × 30 m sprints with a 7 min rest interval between attempts. The cuffs were applied following a 1 min rest period and lasted for 5 min before being released at the 6th minute to allow for reperfusion (1 min + 5 min ischemic intra-conditioning + 1 min reperfusion). The two-way repeated measures ANOVA did not show statistically significant condition × set interaction for time of the sprint (p = 0.06; η2 = 0.05). There was also no main effect of ischemic intra-conditioning for any condition (p = 0.190; η2 = 0.05). This study indicates that ischemic intra-conditioning did not enhance the performance of 30 m sprints performed by athletes. However, ischemic intra-conditioning did not decrease performance either.
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Affiliation(s)
- Krzysztof Fostiak
- Faculty of Physical Education, Gdansk University of Physical Education and Sport, 80-336 Gdansk, Poland
| | - Marta Bichowska
- Faculty of Physical Education, Gdansk University of Physical Education and Sport, 80-336 Gdansk, Poland
| | - Robert Trybulski
- Provita Zory Medical Center, 44-240 Zory, Poland
- Department of Medical Sciences, The Wojciech Korfanty School of Economics, 40-065 Katowice, Poland
| | - Bartosz Trabka
- Faculty of Physical Education, Gdansk University of Physical Education and Sport, 80-336 Gdansk, Poland
| | - Michal Krzysztofik
- Faculty of Physical Education and Sport, Charles University, 500 05 Prague, Czech Republic
| | - Nicholas Rolnick
- The Human Performance Mechanic, CUNY Lehman College, Bronx, New York, NY 10468, USA
| | - Aleksandra Filip-Stachnik
- Institute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education in Katowice, 40-065 Katowice, Poland
| | - Michal Wilk
- Institute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education in Katowice, 40-065 Katowice, Poland
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Winchester LJ, Blake MT, Fleming AR, Aguiar EJ, Fedewa MV, Esco MR, Earley RL. Hemodynamic Responses to Resistance Exercise with Blood Flow Restriction Using a Practical Method Versus a Traditional Cuff-Inflation System. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph191811548. [PMID: 36141820 PMCID: PMC9517024 DOI: 10.3390/ijerph191811548] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 09/09/2022] [Accepted: 09/11/2022] [Indexed: 05/22/2023]
Abstract
UNLABELLED The aim of this study was to examine the potential differences in acute hemodynamic responses and muscular performance outcomes following resistance exercise between traditional blood flow restriction (TRABFR) and a novel band tissue flossing method (BTFBFR). METHODS Fifteen healthy young adults (23.27 ± 2.69 years) visited the lab for three sessions (≥72 h apart). Each session's exercise consisted of three sets of 20 maximum-effort seated leg extensions and flexions with one of three conditions: control (CON), TRABFR (50% limb occlusion pressure (LOP)), or BTFBFR. During TRABFR and BTFBFR sessions, occlusion was applied immediately prior to exercise and removed immediately after. Heart rate was collected prior to exercise, after onset of occlusion, immediately after exercise, and one-minute after removal of occlusion. Ultrasonography was performed prior to, and at least 30 s after, occlusion. RESULTS BTFBFR caused greater reductions in arterial distance (14.28%, p = 0.010) and arterial area (28.43%, p = 0.020) than TRABFR. BTFBFR was able to significantly reduce arterial flow below pre-occlusion values, while TRABFR did not. Both conditions caused significant elevations in heart rate following occlusion (TRABFR: +4.67 bpm, p = 0.046 and BTFBFR: +6.07 bpm, p = 0.034), immediately post-exercise (TRABFR: +56.93 bpm, p < 0.001 and BTFBFR: +52.79 bpm, p < 0.001) and one-minute post-exercise (TRABFR: +15.71, p = 0.003 and BTFBFR: +14.57, p < 0.001). Only BTFBFR caused significant reductions in performance as measured by average power per repetition. CONCLUSIONS BTFBFR causes a more exaggerated decrease in arterial blood flow as well as muscular power when compared to traditional TRABFR at 50% of LOP.
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Affiliation(s)
- Lee J. Winchester
- Exercise Physiology Laboratory, Department of Kinesiology, The University of Alabama, Tuscaloosa, AL 35487, USA
- Correspondence:
| | - Morgan T. Blake
- Exercise Physiology Laboratory, Department of Kinesiology, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Abby R. Fleming
- Exercise Physiology Laboratory, Department of Kinesiology, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Elroy J. Aguiar
- Exercise Physiology Laboratory, Department of Kinesiology, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Michael V. Fedewa
- Exercise Physiology Laboratory, Department of Kinesiology, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Michael R. Esco
- Exercise Physiology Laboratory, Department of Kinesiology, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Ryan L. Earley
- Department of Biology, The University of Alabama, Tuscaloosa, AL 35487, USA
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Krzysztofik M, Zygadło D, Trybek P, Jarosz J, Zając A, Rolnick N, Wilk M. Resistance Training with Blood Flow Restriction and Ocular Health: A Brief Review. J Clin Med 2022; 11:jcm11164881. [PMID: 36013119 PMCID: PMC9410392 DOI: 10.3390/jcm11164881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 08/06/2022] [Accepted: 08/18/2022] [Indexed: 11/16/2022] Open
Abstract
Despite the many health benefits of resistance training, it has been suggested that high-intensity resistance exercise is associated with acute increases in intraocular pressure which is a significant risk factor for the development of glaucomatous optic nerve damage. Therefore, resistance training using a variety of forms (e.g., resistance bands, free weights, weight machines, and bodyweight) may be harmful to patients with or at risk of glaucoma. An appropriate solution for such people may involve the combination of resistance training and blood flow restriction (BFR). During the last decade, the BFR (a.k.a. occlusion or KAATSU training) method has drawn great interest among health and sports professionals because of the possibility for individuals to improve various areas of fitness and performance at lower exercise intensities. In comparison to studies evaluating the efficiency of BFR in terms of physical performance and body composition changes, there is still a paucity of empirical studies concerning safety, especially regarding ocular health. Although the use of BFR during resistance training seems feasible for glaucoma patients or those at risk of glaucoma, some issues must be investigated and resolved. Therefore, this review provides an overview of the available scientific data describing the influence of resistance training combined with BFR on ocular physiology and points to further directions of research.
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Affiliation(s)
- Michał Krzysztofik
- Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education in Katowice, 40-065 Katowice, Poland
- Correspondence:
| | - Dorota Zygadło
- Faculty of Science and Technology, University of Silesia in Katowice, 41-500 Chorzów, Poland
| | - Paulina Trybek
- Faculty of Science and Technology, University of Silesia in Katowice, 41-500 Chorzów, Poland
| | - Jakub Jarosz
- Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education in Katowice, 40-065 Katowice, Poland
| | - Adam Zając
- Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education in Katowice, 40-065 Katowice, Poland
| | - Nicholas Rolnick
- The Human Performance Mechanic, CUNY Lehman College, Bronx, New York, NY 10468, USA
| | - Michał Wilk
- Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education in Katowice, 40-065 Katowice, Poland
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Does caffeine ingestion affect the lower-body post-activation performance enhancement in female volleyball players? BMC Sports Sci Med Rehabil 2022; 14:93. [PMID: 35614511 PMCID: PMC9131637 DOI: 10.1186/s13102-022-00488-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 05/17/2022] [Indexed: 11/29/2022]
Abstract
Background Post-activation performance enhancement (PAPE) is a physiological phenomenon that acutely improves voluntary muscular performance following a conditioning activity. A large and growing body of literature has investigated different strategies to induce a PAPE stimulus; however, little attention has been given to whether acute caffeine ingestion could augment the effect of PAPE on subsequent performance. This study evaluated the acute effects of caffeine ingestion and back squat conditioning activity on subsequent countermovement jump (CMJ) performance in female semi-professional volleyball players. Methods Fourteen resistance-trained female volleyball players (26 ± 3 years) performed 3 different testing conditions in randomized order: where each ingested 6 mg/kg of caffeine (CAF) or placebo (PLAC) and performed a single set of back squats at 80%1RM until mean movement velocity dropped by 10% as the conditioning activity or a control (CTRL) condition where participants did not ingest any supplement and did not perform the conditioning activity. CMJ height was examined at baseline and in 2 min intervals until 10 min postconditioning activity. Furthermore, due to the wide inter-individual variation in optimal recovery time of PAPE response, the baseline and best post-conditioning activity performance were also analyzed. Results The Friedman test revealed a significant difference in jump height within CTRL (p = 0.002) and CAF (p = 0.001) conditions, but no significant difference was found within the PAP condition. The post hoc showed a significant decrease in jump height in 8th min in CTRL condition (p = 0.022, effect size [ES] = −0.31), a significant increase in jump height in 2nd min in CAF condition (p = 0.013, ES = 0.3), without differences in PLAC condition in comparison to baseline values. Moreover, a significant jump height increases from baseline to best performance post conditioning activity value for CAF (p = 0.001, ES = 0.39) and PLAC (p = 0.001, ES = 0.3) condition, but no significant difference was found for the CTRL condition. Conclusions The single set of heavy-loaded back squats with controlled velocity used as a conditioning activity in the current study enhanced subsequent CMJ performance in female volleyball players with no additional effect of caffeine.
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Neuromuscular Impact of Acute Hypertrophic Resistance Loading With and Without Blood-Flow Restriction. J Hum Kinet 2022; 82:27-37. [PMID: 36196340 PMCID: PMC9465727 DOI: 10.2478/hukin-2022-0028] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Exploring acute neuromuscular fatigue induced by different modalities of resistance exercise would help understand the adaptation subsequent to specific training programs. Therefore, we investigated the acute impact of high-intensity and low-intensity blood flow-restricted resistance exercise on the development of explosive torque throughout the torque-time curve. Seventeen healthy, young participants were included in a randomized, counterbalanced within-subjects design study, in which participants underwent two experimental conditions, separated by a 1-wk period. Low-intensity blood-flow restricted exercise and high-intensity resistance exercise were performed using dynamic elbow flexion at 20 and 75% of 1 repetition maximum, respectively. Maximal voluntary contraction (MVC) and the sequential rate of torque development (absolute and relative) were measured before and after exercise. Both protocols elicited a similar decrement in MVC (~ 25%) and in the peak rate of torque development after exercise (~ 45%). The absolute rate of torque development (0-50 and 50-100 ms) was also reduced (p<0.05) similarly between conditions. After normalizing torque values to MVC, this was only sustained for the rate of torque development 0-50ms (p<0.05). We found that both exercise protocols induced similar acute attenuation of the absolute rate of torque development up to the first 100 ms of MVC. We also demonstrated that the reduction in the rate of torque development between 50-100ms (in both protocols) was largely explained by an acute deficit in muscle strength post-exercise. Conversely, the impact of each protocol on the first 50ms of muscle torque did not depend on lower levels of muscle strength after exercise.
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Acute impact of blood flow restriction on strength-endurance performance during the bench press exercise. Biol Sport 2021; 38:653-658. [PMID: 34937975 PMCID: PMC8670800 DOI: 10.5114/biolsport.2021.103726] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/15/2020] [Accepted: 01/18/2021] [Indexed: 11/17/2022] Open
Abstract
The main goal of the present study was to evaluate the acute effects of blood flow restriction (BFR) at 70% of full arterial occlusion pressure on strength-endurance performance during the bench press exercise. The study included 14 strength-trained male subjects (age = 25.6 ± 4.1 years; body mass = 81.7 ± 10.8 kg; bench press 1 repetition maximum (1RM) = 130.0 ± 22.1 kg), experienced in resistance training (3.9 ± 2.4 years). During the experimental sessions in a randomized crossover design, the subjects performed three sets of the bench press at 80% 1RM performed to failure with two different conditions: without BFR (CON); and with BFR (BFR). Friedman's test showed significant differences between BFR and CON conditions for the number of repetitions performed (p < 0.001); for peak bar velocity (p < 0.001) and for mean bar velocity (p < 0.001). The pairwise comparisons showed a significant decrease for peak bar velocity and mean bar velocity in individual Set 1 for BFR when compared to CON conditions (p = 0.01 for both). The two-way repeated measures ANOVA showed a significant main effect for the time under tension (p = 0.02). A post-hoc comparisons for the main effect showed a significant increase in time under tension for BFR when compared to CON (p = 0.02). The results of the presented study indicate that BFR used during strength-endurance exercise generally does not decrease the level of endurance performance, while it causes a drop in bar velocity.
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Enhancement of Countermovement Jump Performance Using a Heavy Load with Velocity-Loss Repetition Control in Female Volleyball Players. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182111530. [PMID: 34770042 PMCID: PMC8583185 DOI: 10.3390/ijerph182111530] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 10/29/2021] [Accepted: 10/31/2021] [Indexed: 11/17/2022]
Abstract
Although velocity control in resistance training is widely studied, its utilization in eliciting post-activation performance enhancement (PAPE) responses receives little attention. Therefore, this study aimed to evaluate the effectiveness of heavy-loaded barbell squats (BS) with velocity loss control conditioning activity (CA) on PAPE in subsequent countermovement jump (CMJ) performance. Sixteen resistance-trained female volleyball players participated in this study (age: 24 ± 5 yrs.; body mass: 63.5 ± 5.2 kg; height: 170 ± 6 cm; relative BS one-repetition maximum (1RM): 1.45 ± 0.19 kg/body mass). Each participant performed two different conditions: a set of the BS at 80% 1 RM with repetitions performed until a mean velocity loss of 10% as the CA or a control condition without CA (CNTRL). To assess changes in jump height (JH) and relative mean power output (MP), the CMJ was performed 5 min before and throughout the 10 min after the CA. The two-way analysis of variance with repeated measures showed a significant main effect of condition (p = 0.008; η2 = 0.387) and time (p < 0.0001; η2 = 0.257) for JH. The post hoc test showed a significant decrease in the 10th min in comparison to the value from baseline (p < 0.006) for the CNTRL condition. For the MP, a significant interaction (p = 0.045; η2 = 0.138) was found. The post hoc test showed a significant decrease in the 10th min in comparison to the values from baseline (p < 0.006) for the CNTRL condition. No significant differences were found between all of the time points and the baseline value for the CA condition. The CA used in the current study fails to enhance subsequent countermovement jump performance in female volleyball players. However, the individual analysis showed that 9 out of the 16 participants (56%) responded positively to the applied CA, suggesting that the PAPE effect may be individually dependent and should be carefully verified before implementation in a training program.
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21
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Wilk M, Trybulski R, Krzysztofik M, Wojdala G, Campos Y, Zajac A, Lulińska E, Stastny P. Acute Effects of Different Blood Flow Restriction Protocols on Bar Velocity During the Squat Exercise. Front Physiol 2021; 12:652896. [PMID: 34234686 PMCID: PMC8255669 DOI: 10.3389/fphys.2021.652896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 05/21/2021] [Indexed: 11/13/2022] Open
Abstract
The main goal of the present study was to evaluate the effects of different blood flow restriction (BFR) protocols (continuous and intermittent) on peak bar velocity (PV) and mean bar velocity (MV) during the squat exercise at progressive loads, from 40 to 90% 1RM. Eleven healthy men (age = 23.4 ± 3.1 years; body mass = 88.5 ± 12.1 kg; squat 1RM = 183.2 ± 30.7 kg; resistance training experience, 5.7 ± 3.6 years) performed experimental sessions once a week for 3 weeks in random and counterbalanced order: without BFR (NO-BFR), with intermittent BFR (I-BFR), and with continuous BFR (C-BFR). During the experimental session, the participants performed six sets of the barbell squat exercise with loads from 40 to 90% 1RM. In each set, they performed two repetitions. During the C-BFR session, the cuffs were maintained throughout the training session. During the I-BFR, the cuffs were used only during the exercise and released for each rest interval. The BFR pressure was set to ∼80% arterial occlusion pressure (AOP). Analyses of variance showed a statistically significant interaction for MV (p < 0.02; η2 = 0.18). However, the post hoc analysis did not show significant differences between particular conditions for particular loads. There was no significant condition × load interaction for PV (p = 0.16; η2 = 0.13). Furthermore, there were no main effects for conditions in MV (p = 0.38; η2 = 0.09) as well as in PV (p = 0.94; η2 = 0.01). The results indicate that the different BFR protocols used during lower body resistance exercises did not reduce peak bar velocity and mean bar velocity during the squat exercise performed with various loads.
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Affiliation(s)
- Michal Wilk
- Institute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education, Katowice, Poland
| | - Robert Trybulski
- Department of Medical Sciences, The Wojciech Korfanty School of Economics, Katowice, Poland.,Provita Zory Medical Center, Zory, Poland
| | - Michal Krzysztofik
- Institute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education, Katowice, Poland
| | - Grzegorz Wojdala
- Institute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education, Katowice, Poland
| | - Yuri Campos
- Postgraduate Program, Faculty of Physical Education and Sports, Federal University of Juiz de Fora, Juiz de Fora, Brazil.,Study Group and Research in Neuromuscular Responses, Federal University of Lavras, Lavras, Brazil
| | - Adam Zajac
- Institute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education, Katowice, Poland
| | - Ewelina Lulińska
- Faculty of Physical Education, Gdansk University of Physical Education and Sport, Gdańsk, Poland
| | - Petr Stastny
- Department of Sport Games, Faculty of Physical Education and Sport, Charles University, Prague, Czechia
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Schwiete C, Franz A, Roth C, Behringer M. Effects of Resting vs. Continuous Blood-Flow Restriction-Training on Strength, Fatigue Resistance, Muscle Thickness, and Perceived Discomfort. Front Physiol 2021; 12:663665. [PMID: 33859576 PMCID: PMC8042206 DOI: 10.3389/fphys.2021.663665] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 03/12/2021] [Indexed: 11/13/2022] Open
Abstract
Introduction: The purpose of this study was to clarify whether blood-flow restriction during resting intervals [resting blood-flow restriction (rBFR)] is comparable to a continuous BFR (cBFR) training regarding its effects on maximum strength, hypertrophy, fatigue resistance, and perceived discomfort. Materials and Methods: Nineteen recreationally trained participants performed four sets (30-15-15-15 repetitions) with 20% 1RM on a 45° leg press twice a week for 6 weeks (cBFR, n = 10; rBFR, n = 9). Maximum strength, fatigue resistance, muscle thickness, and girth were assessed at three timepoints (pre, mid, and post). Subjective pain and perceived exertion were determined immediately after training at two timepoints (mid and post). Results: Maximum strength (p < 0.001), fatigue resistance (p < 0.001), muscle thickness (p < 0.001), and girth (p = 0.008) increased in both groups over time with no differences between groups (p > 0.05). During the intervention, the rBFR group exposed significantly lower perceived pain and exertion values compared to cBFR (p < 0.05). Discussion: Resting blood-flow restriction training led to similar gains in strength, fatigue resistance, and muscle hypertrophy as cBFR training while provoking less discomfort and perceived exertion in participants. In summary, rBFR training could provide a meaningful alternative to cBFR as this study showed similar functional and structural changes as well as less discomfort.
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Affiliation(s)
- Carsten Schwiete
- Department of Sports Medicine and Exercise Physiology, Institute of Sports Sciences, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Alexander Franz
- Department of Adult Reconstruction, ATOS Orthoparc Clinic Cologne, Cologne, Germany
| | - Christian Roth
- Department of Sports Medicine and Exercise Physiology, Institute of Sports Sciences, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Michael Behringer
- Department of Sports Medicine and Exercise Physiology, Institute of Sports Sciences, Goethe University Frankfurt, Frankfurt am Main, Germany
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Wilk M, Krzysztofik M, Jarosz J, Krol P, Leznicka K, Zajac A, Stastny P, Bogdanis GC. Impact of Ischemic Intra-Conditioning on Power Output and Bar Velocity of the Upper Limbs. Front Physiol 2021; 12:626915. [PMID: 33716773 PMCID: PMC7947627 DOI: 10.3389/fphys.2021.626915] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Accepted: 02/01/2021] [Indexed: 01/24/2023] Open
Abstract
This study evaluated the effects of ischemic conditioning on power output and bar velocity in the bench press exercise. Ten healthy males (age: 25 ± 2 years; body mass: 92 ± 8 kg; bench press one repetition maximum -1RM: 145 ± 13 kg), took part in two experimental sessions (with and without ischemia), 1 week apart in random and counterbalanced order. In the ischemic condition, cuffs placed around the upper part of the arms were inflated to 80% of arterial occlusion pressure before each set, while in the control condition there was no blood flow restriction. The exercise protocol included 5 sets of three repetitions each, against a resistance equal to 60% 1RM, with 5 min recovery intervals between sets. There was a main effect of condition for mean power output (MP) and mean bar velocity (MV) (p = 0.01), with overall MP being higher in ischemia than in control by 5.6 ± 4.1% (mean ± 90% compatibility limits), a standardized effect size (ES) of 0.51. Overall MV was also higher by 5.5 ± 4.0%, ES = 0.63. Peak power output (PP) and peak bar velocity (PV) were similar in set 1 of the control and ischemia condition (1039 ± 105 vs. 1054 ± 82 W; 684 ± 74 vs. 696 ± 53 W; 1.09 ± 0.07 vs. 1.12 ± 0.09 m/s; 0.81 ± 0.05 vs. 0.82 ± 0.05 m/s, p = 0.67 to 0.99, mean ± standard deviation). However, from set 3 onward (p = 0.03 to 0.001), PP and PV were higher in ischemia compared with control, with the highest difference observed in set 5 (10.9 ± 5.9%, ES = 0.73 for PP and 8.6 ± 4.6%; ES = 0.89 for PV). These results indicate that ischemia used before each set of the bench press exercise increases power output and bar velocity and this may be used as performance-enhancing stimulus during explosive resistance training.
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Affiliation(s)
- Michal Wilk
- Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education, Katowice, Poland
| | - Michal Krzysztofik
- Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education, Katowice, Poland
| | - Jakub Jarosz
- Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education, Katowice, Poland
| | - Pawel Krol
- College of Medical Sciences, Institute of Physical Culture Studies, University of Rzeszów, Rzeszów, Poland
| | - Katarzyna Leznicka
- Faculty of Physical Education, Gdansk University of Physical Education and Sport, Gdańsk, Poland
| | - Adam Zajac
- Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education, Katowice, Poland
| | - Petr Stastny
- Faculty of Physical Education and Sport, Department of Sport Games, Charles University, Prague, Czechia
| | - Gregory C. Bogdanis
- School of Physical Education and Sport Science, National and Kapodistrian University of Athens, Athens, Greece
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The influence of compressive gear on maximal load lifted in competitive powerlifting. Biol Sport 2020; 37:437-441. [PMID: 33343078 PMCID: PMC7725047 DOI: 10.5114/biolsport.2021.100145] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 07/29/2020] [Accepted: 10/04/2020] [Indexed: 12/14/2022] Open
Abstract
The competition in powerlifting has been divided into two divisions, with gear equipment (EQ) and without gear equipment (RAW). When competing in the EQ division, additional supportive gear can be worn by the athletes, while in the RAW division such gear is not allowed. The aim of the study was to compare the results of the RAW and EQ powerlifting divisions based on the results of world championships and current world records. One-hundred and twenty powerlifters (63 men, 57 women) were included to the analysis. Post hoc analysis for the results of men’s world championships indicated significantly higher results of the barbell squat (SQ; p < 0.001; ES = 1.31), bench press (BP; p < 0.001; ES = 1.27) and deadlift (DL; p < 0.001; ES = 0.37) for EQ compared to the RAW division. Post hoc analysis for the results of women’s world championships indicated significantly higher results of the SQ (p < 0.001; ES = 1.31), BP (p < 0.001; ES = 1.13) and DL (p < 0.001; ES = 0.71) for the EQ compared to the RAW division. Post hoc analysis for men’s world record indicated significantly higher results in the SQ (p < 0.001; ES = 1.32) and BP (p < 0.001; ES = 1.24) for the EQ compared to the RAW division. Furthermore, there were no significant differences in the results of world records in the DL (p = 0.901; ES = 0.26) between the EQ and RAW divisions. Post hoc analysis for women’s world records indicated significantly higher results in the SQ (p < 0.001; ES = 1.22) and BP (p < 0.001; ES = 1.99) for the EQ compared to RAW division. The main finding of the study was that supportive gear increases maximal load lifted during powerlifting competition.
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