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Krause A, Centner C, Walther M, Memmert D, Walser N, Ritzmann R. No beneficial effect of aerobic whole-body electromyostimulation on lower limbs strength and power - a randomized controlled trial. BMC Sports Sci Med Rehabil 2024; 16:144. [PMID: 38956590 PMCID: PMC11218063 DOI: 10.1186/s13102-024-00931-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 06/17/2024] [Indexed: 07/04/2024]
Abstract
BACKGROUND Applying whole-body electromyostimulation (wbEMS) to voluntary activation of the muscle is known to impact motor unit recruitment. Thus, wbEMS as an additional training stimulus enhances force-related capacities. This study aimed to evaluate the mono- and multiarticular strength adaptations to a running intervention with wbEMS compared to running without wbEMS. METHODS In a randomized controlled trial (RCT), 59 healthy participants (32 female/ 27 male, 41 ± 7 years) with minor running experience conducted an eight-week running intervention (2x/ week à 20 min) with a wbEMS suit (EG) or without wbEMS (control group, CG). Maximal isokinetic knee extensor and flexor strength and jump height during countermovement jumps were recorded prior and after the intervention to assess maximal strength and power. RESULTS Following eight weeks of running, maximal isokinetic knee extension torque decreased significantly over time for both interventions (EG Δ -4%, CG Δ -4%; F(1, 44.14) = 5.96, p = 0.02, η = 0.12). No changes were observed for flexion torque (F(1, 43.20) = 3.93, p = 0.05, η = 0.08) or jump height (F(1, 43.04) = 0.32, p = 0.57, η = 0.01). CONCLUSIONS The outcomes indicate that there is no additional effect over neuromuscular function adaptations with the inclusion of wbEMS during running training. Knee extensor strength is even slightly reduced which supports the principle of training specificity in regards to strength adaptation. We conclude that strength improvements cannot be achieved by running with wbEMS. TRIAL REGISTRATION German Clinical Trials Register, ID DRKS00026827, date 10/26/21.
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Affiliation(s)
- Anne Krause
- Institute of Training and Computer Science, German Sport University Cologne, Cologne, Germany
| | - Christoph Centner
- Biomechanics, Praxisklinik Rennbahn, Muttenz, Switzerland
- Department of Sport and Science, University of Freiburg, Freiburg, Germany
| | - Moritz Walther
- Biomechanics, Praxisklinik Rennbahn, Muttenz, Switzerland
| | - Daniel Memmert
- Institute of Training and Computer Science, German Sport University Cologne, Cologne, Germany
| | - Nicolas Walser
- Biomechanics, Praxisklinik Rennbahn, Muttenz, Switzerland
| | - Ramona Ritzmann
- Biomechanics, Praxisklinik Rennbahn, Muttenz, Switzerland.
- Department of Sport and Science, University of Freiburg, Freiburg, Germany.
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Rappelt L, Held S, Micke F, Wiedenmann T, Deutsch JP, Kleinöder H, Donath L. Handcycling with concurrent lower body low-frequency electromyostimulation significantly increases acute oxygen uptake in elite wheelchair basketball players: an acute crossover trial. J Rehabil Med 2024; 56:jrm40028. [PMID: 38850087 PMCID: PMC11182031 DOI: 10.2340/jrm.v56.40028] [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: 02/01/2024] [Accepted: 05/13/2024] [Indexed: 06/09/2024] Open
Abstract
OBJECTIVE Wheelchair basketball (WCB) demands high-intensity training due to its intermittent nature. However, acute oxygen uptake (V˙O2) in handcycling is restricted. Combining handcycling with low-frequency electromyostimulation (LF-EMS) may enhance V˙O2 in elite WBC athletes. DESIGN Randomized crossover trail. SUBJECTS Twelve German national team WCB players (age: 25.6 [5.6] years, height: 1.75 [0.16] m, mass: 74.0 [21.7] kg, classification: 2.92 [1.26]). METHOD Participants underwent 2×5 min of handcycling (60 rpm, ¾ bodyweight resistance in watts) (HANDCYCLE) and 2×5 min of handcycling with concurrent LF-EMS (EMS_HANDCYCLE). LF-EMS (4Hz, 350µs, continuous stimulation) targeted gluteal, quadriceps, and calf muscles, adjusted to individual pain thresholds (buttocks: 69.5 [22.3] mA, thighs: 66.8 [20.0] mA, calves: 68.9 [31.5] mA). RESULTS Significant mode-dependent differences between HANDCYCLE and EMS_HANDCYCLE were found in V˙O2 (17.60 [3.57] vs 19.23 [4.37] ml min-1 kg-1, p = 0.001) and oxygen pulse (16.69 [4.51] vs 18.41 [5.17] ml, p = 0.002). ΔLactate was significantly lower in HANDCYCLE (0.04 [0.28] vs 0.31 [0.26] mmol l-1). Although perceived effort did not differ (p = 0.293), discomfort was rated lower in HANDCYCLE (1.44 [1.28] vs 3.94 [2.14], p = 0.002). CONCLUSION LF-EMS applied to the lower extremities increases oxygen demand during submaximal handcycling. Thus, longitudinal application of LF-EMS should be investigated as a potential training stimulus to improve aerobic capacity in wheelchair athletes.
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Affiliation(s)
- Ludwig Rappelt
- 1Department of Intervention Research in Exercise Training, German Sport University Cologne, Cologne, Germany; Department of Movement and Training Science, University of Wuppertal, Wuppertal, Germany.
| | - Steffen Held
- Department of Intervention Research in Exercise Training, German Sport University Cologne, Cologne, Germany; Department of Sport and Management, IST University of Applied Sciences, Düsseldorf, Germany
| | - Florian Micke
- Department of Intervention Research in Exercise Training, German Sport University Cologne, Cologne, Germany; Department of Sport and Management, IST University of Applied Sciences, Düsseldorf, Germany
| | - Tim Wiedenmann
- Department of Intervention Research in Exercise Training, German Sport University Cologne, Cologne, Germany
| | - Jan-Philip Deutsch
- Department of Intervention Research in Exercise Training, German Sport University Cologne, Cologne, Germany
| | - Heinz Kleinöder
- Department of Intervention Research in Exercise Training, German Sport University Cologne, Cologne, Germany
| | - Lars Donath
- Department of Intervention Research in Exercise Training, German Sport University Cologne, Cologne, Germany
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Rappelt L, Micke F, Held S, Dörmann U, Kleinöder H, Donath L. Effects of Four Weeks of Static vs. Dynamic Bodyweight Exercises with Whole-Body Electromyostimulation on Jump and Strength Performance: A Two-Armed, Randomized, Controlled Trial. J Sports Sci Med 2023; 22:226-234. [PMID: 37293409 PMCID: PMC10244999 DOI: 10.52082/jssm.2023.226] [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: 10/26/2022] [Accepted: 03/31/2023] [Indexed: 06/10/2023]
Abstract
The combination of strength training with complementary whole-body electromyostimulation (WB-EMS) and plyometric exercises has been shown to increase strength and jumping performance in athletes. In elite sport, however, the mesocycles of training are often organized according to block periodization. Furthermore, WB-EMS is often applied onto static strength exercises, which may hamper the transfer into more sport-specific tasks. Thus, this study aimed at investigating whether four weeks of strength training with complementary dynamic vs. static WB-EMS followed by a four-week block of plyometric training increases maximal strength and jumping performance. A total of n = 26 (13 female/13 male) trained adults (20.8 ± 2.2 years, 69.5 ± 9.5kg, 9.7 ± 6.1h of training/w) were randomly assigned to a static (STA) or volume-, load- and work-to-rest-ratio-matched dynamic training group (DYN). Before (PRE), after four weeks (three times weekly) of WB-EMS training (MID) and a subsequent four-week block (twice weekly) of plyometric training (POST), maximal voluntary contraction (MVC) at leg extension (LE), leg curl (LC) and leg press machines (LP) and jumping performance (SJ, Squat Jump; CMJ, counter-movement-jump; DJ, drop-jump) were assessed. Furthermore, perceived effort (RPE) was rated for each set and subsequently averaged for each session. MVC at LP notably increased between PRE and POST in both STA (2335 ± 539 vs. 2653 ± 659N, standardized mean difference [SMD] = 0.528) and DYN (2483 ± 714N vs. 2885 ± 843N, SMD = 0.515). Reactive strength index of DJ showed significant differences between STA and DYN at MID (162.2 ± 26.4 vs. 123.1 ± 26.5 cm·s-1, p = 0.002, SMD = 1.478) and POST (166.1 ± 28.0 vs. 136.2 ± 31.7 cm·s-1, p = 0.02, SMD = 0.997). Furthermore, there was a significant effect for RPE, with STA rating perceived effort higher than DYN (6.76 ± 0.32 vs. 6.33 ± 0.47 a.u., p = 0.013, SMD = 1.058). When employing a training block of high-density WB-EMS both static and dynamic exercises lead to similar adaptations.
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Affiliation(s)
- Ludwig Rappelt
- Department of Intervention Research in Exercise Training, German Sports University Cologne, Germany
- Department of Movement and Training Science, University of Wuppertal, Wuppertal, Germany
| | - Florian Micke
- Department of Intervention Research in Exercise Training, German Sports University Cologne, Germany
| | - Steffen Held
- Department of Intervention Research in Exercise Training, German Sports University Cologne, Germany
- Department of Sport and Management, IST University of Applied Sciences, Duesseldorf, Germany
| | - Ulrike Dörmann
- Department of Intervention Research in Exercise Training, German Sports University Cologne, Germany
| | - Heinz Kleinöder
- Department of Intervention Research in Exercise Training, German Sports University Cologne, Germany
| | - Lars Donath
- Department of Intervention Research in Exercise Training, German Sports University Cologne, Germany
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Additional Active Movements Are Not Required for Strength Gains in the Untrained during Short-Term Whole-Body Electromyostimulation Training. Healthcare (Basel) 2023; 11:healthcare11050741. [PMID: 36900747 PMCID: PMC10000632 DOI: 10.3390/healthcare11050741] [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: 01/26/2023] [Revised: 02/24/2023] [Accepted: 02/27/2023] [Indexed: 03/06/2023] Open
Abstract
Recommendations for conventional strength training are well described, and the volume of research on whole-body electromyostimulation training (WB-EMS) is growing. The aim of the present study was to investigate whether active exercise movements during stimulation have a positive effect on strength gains. A total of 30 inactive subjects (28 completed the study) were randomly allocated into two training groups, the upper body group (UBG) and the lower body group (LBG). In the UBG (n = 15; age: 32 (25-36); body mass: 78.3 kg (53.1-114.3 kg)), WB-EMS was accompanied by exercise movements of the upper body and in the LBG (n = 13; age: 26 (20-35); body mass: 67.2 kg (47.4-100.3 kg)) by exercise movements of the lower body. Therefore, UBG served as a control when lower body strength was considered, and LBG served as a control when upper body strength was considered. Trunk exercises were performed under the same conditions in both groups. During the 20-min sessions, 12 repetitions were performed per exercise. In both groups, stimulation was performed with 350 μs wide square pulses at 85 Hz in biphasic mode, and stimulation intensity was 6-8 (scale 1-10). Isometric maximum strength was measured before and after the training (6 weeks set; one session/week) on 6 exercises for the upper body and 4 for the lower body. Isometric maximum strength was significantly higher after the EMS training in both groups in most test positions (UBG p < 0.001-0.031, r = 0.88-0.56; LBG p = 0.001-0.039, r = 0.88-0.57). Only for the left leg extension in the UBG (p = 0.100, r = 0.43) and for the biceps curl in the LBG (p = 0.221, r = 0.34) no changes were observed. Both groups showed similar absolute strength changes after EMS training. Body mass adjusted strength for the left arm pull increased more in the LBG group (p = 0.040, r = 0.39). Based on our results we conclude that concurring exercise movements during a short-term WB-EMS training period have no substantial influence on strength gains. People with health restrictions, beginners with no experience in strength training and people returning to training might be particularly suitable target groups, due to the low training effort. Supposedly, exercise movements become more relevant when initial adaptations to training are exhausted.
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Micke F, Held S, Lindenthal J, Donath L. Effects of electromyostimulation on performance parameters in sportive and trained athletes: A systematic review and network meta-analysis. Eur J Sport Sci 2022:1-11. [PMID: 35913269 DOI: 10.1080/17461391.2022.2107437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
This systematic review and network meta-analysis aimed to evaluate the effectiveness of different electromyostimulation (EMS) training interventions on performance parameters in trained athletes. The research was conducted until may 2021 using the online databases PubMed, Web of Science, Cochrane and SPORTDiscus for studies with the following inclusion criteria: (a) controlled trials, (b) EMS trials with at least one exercise and/or control group, (c) strength and/or jump and/or sprint and/or aerobic capacity parameter as outcome (d) sportive/trained subjects. Standardized mean differences (SMD) with 95% confidence interval (CI) and random effects models were calculated. Thirty-six studies with 1.092 participants were selected and 4 different networks (strength, jump, sprint, aerobic capacity) were built. A ranking of different exercise methods was achieved. The highest effects for pairwise comparisons against the reference control "active control" were found for a combination of resistance training with superimposed EMS and additional jump training (outcome strength: 4.43 SMD [2.15; 6.70 CI]; outcome jump: 3.14 SMD [1.80;4.49]), jump training with superimposed whole-body electromyostimulation (WB-EMS) (outcome sprint: 1.65 SMD [0.67; 2.63 CI] and high intensity bodyweight resistance training with superimposed WB-EMS (outcome aerobic capacity: 0.83 SMD [-0.49; 2.16 CI]. These findings indicate that the choice of EMS-specific factors such as the EMS application mode, the combination with voluntary activation, and the selection of stimulation protocols has an impact on the magnitude of the effects and should therefore be carefully considered, especially in athletes. Superimposed EMS with relatively low volume, high intensity and outcome-specific movement pattern appeared to positively influence adaptations in athletes.
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Affiliation(s)
- Florian Micke
- German Sport University Cologne, Department of Intervention Research in Exercise Training
| | - Steffen Held
- German Sport University Cologne, Department of Intervention Research in Exercise Training
| | - Jessica Lindenthal
- German Sport University Cologne, Department of Intervention Research in Exercise Training
| | - Lars Donath
- German Sport University Cologne, Department of Intervention Research in Exercise Training
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Baron MV, Silva PE, Koepp J, Urbanetto JDS, Santamaria AFM, Dos Santos MP, de Mello Pinto MV, Brandenburg C, Reinheimer IC, Carvalho S, Wagner MB, Miliou T, Poli-de-Figueiredo CE, Pinheiro da Costa BE. Efficacy and safety of neuromuscular electrical stimulation in the prevention of pressure injuries in critically ill patients: a randomized controlled trial. Ann Intensive Care 2022; 12:53. [PMID: 35695996 PMCID: PMC9188909 DOI: 10.1186/s13613-022-01029-1] [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: 03/10/2022] [Accepted: 06/05/2022] [Indexed: 11/30/2022] Open
Abstract
Background Pressure injuries (PIs), especially in the sacral region are frequent, costly, and increase morbidity and mortality of patients in an intensive care unit (ICU). These injuries can occur as a result of prolonged pressure and/or shear forces. Neuromuscular electrical stimulation (NMES) can increase muscle mass and improve local circulation, potentially reducing the incidence of PI. Methods We performed a randomized controlled trial to assess the efficacy and safety of NMES in preventing PI in critically ill patients. We included patients with a period of less than 48 h in the ICU, aged ≥ 18 years. Participants were randomly selected (1:1 ratio) to receive NMES and usual care (NMES group) or only usual care (control group—CG) until discharge, death, or onset of a PI. To assess the effectiveness of NMES, we calculated the relative risk (RR) and number needed to treat (NNT). We assessed the muscle thickness of the gluteus maximus by ultrasonography. To assess safety, we analyzed the effects of NMES on vital signs and checked for the presence of skin burns in the stimulated areas. Clinical outcomes were assessed by time on mechanical ventilation, ICU mortality rate, and length of stay in the ICU. Results We enrolled 149 participants, 76 in the NMES group. PIs were present in 26 (35.6%) patients in the CG and 4 (5.3%) in the NMES group (p ˂ 0.001). The NMES group had an RR = 0.15 (95% CI 0.05–0.40) to develop a PI, NNT = 3.3 (95% CI 2.3–5.9). Moreover, the NMES group presented a shorter length of stay in the ICU: Δ = − 1.8 ± 1.2 days, p = 0.04. There was no significant difference in gluteus maximus thickness between groups (CG: Δ = − 0.37 ± 1.2 cm vs. NMES group: Δ = 0 ± 0.98 cm, p = 0.33). NMES did not promote deleterious changes in vital signs and we did not detect skin burns. Conclusions NMES is an effective and safe therapy for the prevention of PI in critically ill patients and may reduce length of stay in the ICU. Trial registration RBR-8nt9m4. Registered prospectively on July 20th, 2018, https://ensaiosclinicos.gov.br/rg/RBR-8nt9m4
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Affiliation(s)
- Miriam Viviane Baron
- Pontifical Catholic University of Rio Grande do Sul, Rio Grande do Sul, Porto Alegre, Brazil. .,Instituto Interdisciplinar de Educação, Ciência e Saúde, Fortaleza, Ceará, Brazil.
| | - Paulo Eugênio Silva
- Secretaria de Estado de Saúde do Distrito Federal, Hospital de Base do Distrito Federal, Distrito Federal, Brasília, Brazil
| | - Janine Koepp
- University of Santa Cruz do Sul, Santa Cruz do Sul, Rio Grande do Sul, Brazil
| | | | | | | | | | - Cristine Brandenburg
- Faculdade de Educação, Ciências e Letras do Sertão Central, Quixadá, Ceará, Brazil.,Instituto Interdisciplinar de Educação, Ciência e Saúde, Fortaleza, Ceará, Brazil
| | | | - Sonia Carvalho
- Rigshospital, Inge Lehmannsvej, Copenhagen East, Denmark
| | - Mário Bernardes Wagner
- Pontifical Catholic University of Rio Grande do Sul, Rio Grande do Sul, Porto Alegre, Brazil
| | - Thomas Miliou
- State University of Campinas, Campinas, São Paulo, Brazil
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Rodrigues-Santana L, Louro H, Denche-Zamorano Á, Vega-Muñoz A, Contreras-Barraza N, Adsuar JC. Profile of Whole Body Electromyostimulation Training Users-A Pilot Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19084711. [PMID: 35457575 PMCID: PMC9029882 DOI: 10.3390/ijerph19084711] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 04/06/2022] [Accepted: 04/08/2022] [Indexed: 12/18/2022]
Abstract
(1) Introduction: Whole Body Electromyostimulation is a technological and time efficient personal training practiced all over the world. With the increase of practitioners in the last 10 years, the need to study more about practitioners has arisen, so this pilot study aims to trace a user profile of this method through the analysis of socio-demographic data for a better understand of the profile of people looking for this type of training to improve the effectiveness of the intervention and develop programs that are in accordance with the motivation of practitioners. (2) Methods: 270 users from 5 countries answered an online questionnaire with socio-demographic questions. Data were treated using descriptive statistics. Possible differences between sexes and between groups were analyzed by means of non-parametric statistical tests: Mann−Whitney U-test (continuous variables); in addition to studying possible dependence relationships and differences between proportions, using the Chi-square statistic with pairwise z-test using the Bonferroni correction (categorical variables). (3) Results: Middle-aged women are the main user of this type of training. The majority of WB-EMS users do another type of physical activity with significant difference between men and woman (p < 0.05) men are more active than women. Weight loss, health and wellness and muscle mass increase are the main goals of the WB-EMS users. There are significant differences in weight loss and rehabilitation between genders (p < 0.05). Women look much more than men to lose weight and men look more than women to rehabilitation. (4) Conclusions: The user profile is a physically active woman, aged 35−49 years, with normal weight and high educational level, who carries out twice weekly full body electrostimulation training with the goals of weight loss, health and/or wellness and muscle mass gain.
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Affiliation(s)
- Luiz Rodrigues-Santana
- Faculty of Sport Science, University of Extremadura, 10003 Cáceres, Spain
- Correspondence:
| | - Hugo Louro
- Sport Sciences School of Rio Maior, Research Center in Sport Science, Health and Human Development, 5000-801 Vila Real, Portugal;
- Life Quality Research Center, 2040-413 Santarém, Portugal
| | - Ángel Denche-Zamorano
- Promoting a Healthy Society (PHeSo), Faculty of Sport Science, University of Extremadura, 10003 Cáceres, Spain; (Á.D.-Z.); (J.C.A.)
| | - Alejandro Vega-Muñoz
- Public Policy Observatory, Universidad Autónoma de Chile, Santiago 7500912, Chile;
| | | | - Jose Carmelo Adsuar
- Promoting a Healthy Society (PHeSo), Faculty of Sport Science, University of Extremadura, 10003 Cáceres, Spain; (Á.D.-Z.); (J.C.A.)
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Kemmler W, Shojaa M, Steele J, Berger J, Fröhlich M, Schoene D, von Stengel S, Kleinöder H, Kohl M. Efficacy of Whole-Body Electromyostimulation (WB-EMS) on Body Composition and Muscle Strength in Non-athletic Adults. A Systematic Review and Meta-Analysis. Front Physiol 2021; 12:640657. [PMID: 33716787 PMCID: PMC7952886 DOI: 10.3389/fphys.2021.640657] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 01/19/2021] [Indexed: 12/12/2022] Open
Abstract
This systematic review and meta-analysis set out to determine the efficacy on whole-body electromyostimulation (WB-EMS) on body composition and strength parameters in non-athletic cohorts. A systematic review of the literature according to the PRISMA statement included (a) controlled trials, (b) WB-EMS trials with at least one exercise and one control group, (c) WB-EMS as primary physical intervention, (d) WB-EMS with at least six electrodes covering most muscle groups, (e) non-athletic cohorts. We searched eight electronic databases up to June 30, 2020, without language restrictions. Standardized mean differences (SMD) for muscle mass parameters, total body fat mass, maximum leg extension, and trunk extension strength were defined as outcome measures. In summary, 16 studies with 19 individual WB-EMS groups representing 897 participants were included. Studies vary considerably with respect to age, BMI, and physical conditions. Impulse protocols of the studies were roughly comparable, but training frequency (1-5 sessions/week) and intervention length (6-54 weeks) differed between the studies. SMD average was 1.23 (95%-CI: 0.71-1.76) for muscle mass, 0.98 (0.74-1.22) for maximum leg, and 1.08 (0.78-1.39) for maximum trunk extension strength changes (all p < 0.001). SMD for body fat changes (-0.40, [-0.98 to 0.17]), however, did not reach significance. I 2 and Q-statistics revealed substantial heterogeneity of muscle and fat mass changes between the trials. However, rank and regression tests did not indicate positive evidence for small-study bias and funnel plot asymmetries. This work provided further evidence for significant, large-sized effects of WB-EMS on muscle mass and strength parameters, but not on body fat mass. Clinical Trial Registration: ClinicalTrials.gov, PROSPERO; ID: CRD42020183059.
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Affiliation(s)
- Wolfgang Kemmler
- Institute of Medical Physics, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Mahdieh Shojaa
- Institute of Medical Physics, University of Erlangen-Nürnberg, Erlangen, Germany
| | - James Steele
- Ukactive Research Institute, London, United Kingdom.,Faculty of Sport, Health, and Social Sciences, Solent University, Southampton, United Kingdom
| | - Joshua Berger
- Department of Sports Science, Technische Universität Kaiserslauter, Kaiserslautern, Germany
| | - Michael Fröhlich
- Department of Sports Science, Technische Universität Kaiserslauter, Kaiserslautern, Germany
| | - Daniel Schoene
- Institute of Medical Physics, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Simon von Stengel
- Institute of Medical Physics, University of Erlangen-Nürnberg, Erlangen, Germany
| | | | - Matthias Kohl
- Faculty Medical and Life Sciences, University of Furtwangen, Villingen-Schwenningen, Germany
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9
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Pano-Rodriguez A, Beltran-Garrido JV, Hernandez-Gonzalez V, Nasarre-Nacenta N, Reverter-Masia J. Impact of Whole Body Electromyostimulation on Velocity, Power and Body Composition in Postmenopausal Women: A Randomized Controlled Trial. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E4982. [PMID: 32664361 PMCID: PMC7400631 DOI: 10.3390/ijerph17144982] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 07/02/2020] [Accepted: 07/02/2020] [Indexed: 02/08/2023]
Abstract
Menopause is associated with losses in strength and power along with weight and fat mass gains, which may result from menopause-related hormonal changes, aging-associated diseases, and decreased physical activity time. The objective of this study is to analyze if whole-body electromyostimulation (WB-EMS) is suitable for the prevention and treatment of postmenopausal physical deterioration. Thirty-four healthy sedentary women between 55 and 69 years followed an experimental design pre-post test. Both groups conducted 10 weeks of aerobic and strength training program. The experimental group conducted the training with superimposed WB-EMS during exercise. At the end of the intervention, the experimental group obtained better power (Squat: mean difference (MD) = 38.69 W [1.75,75.62], d = 0.81; Bench press: MD = 25.64 W [17.48, 33.82], d = 2.39) and velocity (Squat: MD = 0.04 m·s-1 [0.01, 0.08], d = 0.98; Bench press: MD = 0.10 m·s-1 [0.06, 0.14], d = 1.90) score improvements than the other group (pBonferroni < 0.05). Furthermore, trivial to small effects were found in the body composition of the participants of both groups (p > 0.050). WB-EMS showed a favorable isolated effect on the development of power and velocity, but it induced negligible effects on the body composition of postmenopausal women.
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Affiliation(s)
| | - Jose Vicente Beltran-Garrido
- EUSES Escola Universitària de la Salut i l’Esport, Rovira i Virgili University, 43870 Tarragona, Spain; (J.V.B.-G.); (J.R.-M.)
| | | | | | - Joaquin Reverter-Masia
- EUSES Escola Universitària de la Salut i l’Esport, Rovira i Virgili University, 43870 Tarragona, Spain; (J.V.B.-G.); (J.R.-M.)
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10
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Pano-Rodriguez A, Beltran-Garrido JV, Hernandez-Gonzalez V, Reverter-Masia J. Effects of Whole-Body Electromyostimulation on Physical Fitness in Postmenopausal Women: A Randomized Controlled Trial. SENSORS 2020; 20:s20051482. [PMID: 32182674 PMCID: PMC7085547 DOI: 10.3390/s20051482] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 03/04/2020] [Accepted: 03/06/2020] [Indexed: 12/12/2022]
Abstract
Whole-body electromyostiulation (WB-EMS) has experienced a boom in recent years, even though its effectiveness is controversial. A sedentary lifestyle is deeply rooted in the European population, mainly in the elderly. This experimental study analyzed the impact of WB-EMS on the physical fitness of postmenopausal women. Thirty-four healthy sedentary women between 55 and 69 years followed an experimental design pre–post-test. Both groups conducted a ten-week aerobic and strength training program. The experimental group overlaid the WB-EMS during exercise. At the end of the intervention, both groups improved upper and lower body strength, lower extremity flexibility, agility, and speed levels (pBonferroni < 0.05). Significant interactions were observed at upper and lower body strength, agility, speed, and cardiovascular endurance (p < 0.05). The WB-EMS group scored better agility than the control group at the end of the intervention (pBonferroni < 0.05) and was the only group that improved cardiovascular endurance. WB-EMS shows a favorable isolate effect on the development of dynamic leg strength, agility, and cardiovascular endurance but did not in dynamic arm strength, gait speed, balance, or flexibility of postmenopausal women.
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Affiliation(s)
- Alvaro Pano-Rodriguez
- Research Group Human Movement, University of Lleida, Av. de l’Estudi General, n.4 E-25001 Lleida, Spain; (V.H.-G.); (J.R.-M.)
- Correspondence: ; Tel.: +346-4954-6894
| | - Jose Vicente Beltran-Garrido
- EUSES Health and Sport Sciences School, Rovira i Virgili University, C/Sebastià Joan Arbó, 2, 43870 Amposta, Spain;
| | - Vicenç Hernandez-Gonzalez
- Research Group Human Movement, University of Lleida, Av. de l’Estudi General, n.4 E-25001 Lleida, Spain; (V.H.-G.); (J.R.-M.)
| | - Joaquín Reverter-Masia
- Research Group Human Movement, University of Lleida, Av. de l’Estudi General, n.4 E-25001 Lleida, Spain; (V.H.-G.); (J.R.-M.)
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11
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Horobin JT, Sabapathy S, Simmonds MJ. Red blood cell tolerance to shear stress above and below the subhemolytic threshold. Biomech Model Mechanobiol 2019; 19:851-860. [PMID: 31720887 DOI: 10.1007/s10237-019-01252-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Accepted: 11/05/2019] [Indexed: 12/20/2022]
Abstract
Mechanical circulatory support device (MCS) design has improved over the years and yet blood damage (e.g., hemolysis) remains a problem. Accumulating evidence indicates a subhemolytic threshold for red blood cells (RBC)-a threshold at which RBC deformability is impaired prior to hemolysis. The current study aimed to assess the deformability of RBC exposed to supra-physiological shear stresses that are typical of MCS devices and assess whether a method used to estimate an individualized subhemolytic threshold, accurately demarcates whether future application of shear stress was damaging. Suspensions of RBC were "conditioned" with discrete magnitudes of shear stress (5-100 Pa) for specific durations (1-16 s). Cellular deformability was subsequently measured via ektacytometry and a mechanical sensitivity (MS) index was calculated to identify the subhemolytic threshold. Thereafter, fresh RBC suspensions were exposed to a magnitude of shear stress 10 Pa above, 10 Pa below, or matched to a donor's previously estimated subhemolytic threshold for a given duration (1, 4, 16 s) to ascertain the sensitivity of the subhemolytic threshold. The MS index of RBC was significantly impaired following exposure to 10 Pa above the subhemolytic threshold (p < 0.0001), and significantly enhanced following exposure to 10 Pa below the subhemolytic threshold (p < 0.01). For all shear conditions, there was no significant increase in free hemoglobin. Functional assessments of RBC may be useful when conducting biocompatibility testing of MCS devices, to detect trauma to blood prior to overt cell rupture being induced.
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Affiliation(s)
- Jarod T Horobin
- Menzies Health Institute Queensland, Griffith University, Gold Coast, Australia. .,Biorheology Research Laboratory, Griffith University, Gold Coast, Australia.
| | - Surendran Sabapathy
- Menzies Health Institute Queensland, Griffith University, Gold Coast, Australia
| | - Michael J Simmonds
- Menzies Health Institute Queensland, Griffith University, Gold Coast, Australia.,Biorheology Research Laboratory, Griffith University, Gold Coast, Australia
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12
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Filipovic A, Bizjak D, Tomschi F, Bloch W, Grau M. Influence of Whole-Body Electrostimulation on the Deformability of Density-Separated Red Blood Cells in Soccer Players. Front Physiol 2019; 10:548. [PMID: 31156450 PMCID: PMC6530393 DOI: 10.3389/fphys.2019.00548] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 04/18/2019] [Indexed: 11/16/2022] Open
Abstract
Red blood cell nitric oxide synthase (RBC-NOS) dependent NO production positively affects RBC deformability which is known to improve oxygen supply to the working tissue. Whole-body electrostimulation (WB-EMS) has been shown to improve maximum strength, sprinting and jumping performance, and to increase deformability in elite soccer players during the season. The aim of the present study was to investigate whether WB-EMS affects RBC turnover which might affect overall deformability of circulating RBC by rejuvenation of the RBC population and if this might be related to improved endurance capacity. Thirty male field soccer players were assigned in either a WB-EMS group (EG, n = 10), a training group (TG, n = 10), or a control group (CG, n = 10). EG performed 3 × 10 squat jumps superimposed with WB-EMS twice per week in concurrent to 2-4 soccer training sessions and one match per week. TG only performed 3 × 10 squat jumps without EMS in addition to their soccer routine and the CG only performed the usual soccer training and match per week. Subjects were tested before (Baseline) and in week 7 (wk-7), with blood sampling before (Pre), 15-30 min after (Post), and 24 h after (24 h post) the training. Endurance capacity was determined before and directly after the training period. The key findings of the investigation indicate an increase in young RBC in the EG group along with improved overall RBC deformability, represented by decreased SS1/2:EImax Ratio. Analysis of the different RBC subfractions revealed improved RBC deformability of old RBC during study period. This improvement was not only observed in the EG but also in TG and CG. Changes in RBC deformability were not associated to altered RBC-NOS/NO signaling pathway. Endurance capacity remained unchanged during study period. In summary, the effect of WB-EMS on RBC physiology seems to be rather low and results are only in part comparable to previous findings. According to the lower training volume of the present study it can be speculated that the soccer specific training load in addition to the WB-EMS was too low to induce changes in RBC physiology.
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Affiliation(s)
- Andre Filipovic
- Institute of Molecular and Cellular Sports Medicine, German Sport University Cologne, Cologne, Germany
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13
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Pano-Rodriguez A, Beltran-Garrido JV, Hernández-González V, Reverter-Masia J. Effects of whole-body ELECTROMYOSTIMULATION on health and performance: a systematic review. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2019; 19:87. [PMID: 31014310 PMCID: PMC6480820 DOI: 10.1186/s12906-019-2485-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 03/14/2019] [Indexed: 11/17/2022]
Abstract
BACKGROUND Whole-body electrical myostimulation (WB-EMS) is a relatively recent training methodology that has been extraordinarily used in recent years. However, there is a lack of consensus on the effectiveness of WB-EMS in the situations in which its use has been largely popularized. The objective of this systematic review was to determine the effects produced by WB-EMS. METHODS A search of PubMed, Web of Science, Scopus and Cochrane was performed to identify all the studies that have applied electrical stimulation in lower and upper limbs simultaneously and that have clearly presented their protocols for the training and application of the stimulation. The last search was performed on September 9, 2018. Studies written in English or German were included. RESULTS A total of 21 articles met the inclusion criteria and were analyzed following the guidelines of the Cochrane Guide for Systematic Reviews. Nineteen studies analyzed the chronic effects of WB-EMS, and 2 analyzed acute effects with a total of 505 subjects (310 men and 195 women). In total, 35% were moderately trained, and 65% were sedentary subjects. Different dependent variables were studied, such as anthropometric parameters, strength parameters, energy expenditure, psychophysiological parameters and blood parameters. There is a lack of randomized controlled studies, and the studies included exhibit a moderate to high level of risk of bias. CONCLUSIONS Given the limited number of available studies on WB-EMS, the scarce amount of scientific evidence found does not allow definitive conclusions about its effects; therefore, future studies about WB-EMS are necessary.
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Affiliation(s)
- Alvaro Pano-Rodriguez
- Research Group Human Movement, University of Lleida, Av. de l’Estudi Generaln.4 E-25001Lleida, Lleida, Spain
| | | | - Vicenç Hernández-González
- Research Group Human Movement, University of Lleida, Av. de l’Estudi Generaln.4 E-25001Lleida, Lleida, Spain
| | - Joaquim Reverter-Masia
- Research Group Human Movement, University of Lleida, Av. de l’Estudi Generaln.4 E-25001Lleida, Lleida, Spain
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14
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Amaro‐Gahete FJ, De‐la‐O A, Jurado‐Fasoli L, Ruiz JR, Castillo MJ, Gutiérrez Á. Effects of different exercise training programs on body composition: A randomized control trial. Scand J Med Sci Sports 2019; 29:968-979. [DOI: 10.1111/sms.13414] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 02/27/2019] [Indexed: 01/08/2023]
Affiliation(s)
- Francisco J. Amaro‐Gahete
- EFFECTS‐262 Research Group, Department of Medical Physiology School of Medicine University of Granada Granada Spain
- PROmoting FITness and Health through Physical Activity Research Group (PROFITH), Department of Physical Education and Sports, Faculty of Sport Sciences University of Granada Granada Spain
| | - Alejandro De‐la‐O
- EFFECTS‐262 Research Group, Department of Medical Physiology School of Medicine University of Granada Granada Spain
| | - Lucas Jurado‐Fasoli
- EFFECTS‐262 Research Group, Department of Medical Physiology School of Medicine University of Granada Granada Spain
| | - Jonatan R. Ruiz
- PROmoting FITness and Health through Physical Activity Research Group (PROFITH), Department of Physical Education and Sports, Faculty of Sport Sciences University of Granada Granada Spain
| | - Manuel J. Castillo
- EFFECTS‐262 Research Group, Department of Medical Physiology School of Medicine University of Granada Granada Spain
| | - Ángel Gutiérrez
- EFFECTS‐262 Research Group, Department of Medical Physiology School of Medicine University of Granada Granada Spain
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15
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Amaro-Gahete FJ, De-la-O A, Sanchez-Delgado G, Robles-Gonzalez L, Jurado-Fasoli L, Ruiz JR, Gutierrez A. Whole-Body Electromyostimulation Improves Performance-Related Parameters in Runners. Front Physiol 2018; 9:1576. [PMID: 30483147 PMCID: PMC6242945 DOI: 10.3389/fphys.2018.01576] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 10/22/2018] [Indexed: 01/05/2023] Open
Abstract
The aim of this study was to study the effects of a 6-session (one per week) WB-EMS training intervention on maximum oxygen uptake, aerobic and gas exchange thresholds, running economy, and muscular power in male recreational runners. Twelve men were randomized into WB-EMS intervention (n = 6; 27.0 ± 7.5 years; 70.1 ± 11.1 kg; 1.75 ± 0.5 m) or control (n = 6; 27.0 ± 6.1 years; 73.6 ± 3.4 kg; 1.77 ± 0.3 m). The WB-EMS group reduced the running training frequency to one per week and followed one WB-EMS training session per week during 6 weeks. Participants in the control group maintained their usual running endurance training. Each participant completed four assessments: physiological parameters [(i) VO2max, aerobic and gas exchange threshold values, and (ii) running economy at two intensities], muscular power (vertical jump), and anthropometric parameters both at baseline and after the intervention. Participants in the WB-EMS group improved VO2max, aerobic and gas exchange threshold values, running economy, and vertical jump (p < 0.05) compared to the control group. There, WB-EMS seems to be an effective training methodology leading to improvements in performance during endurance training volume reduction in male recreational runners.
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Affiliation(s)
- Francisco J Amaro-Gahete
- Department of Medical Physiology, School of Medicine, University of Granada, Granada, Spain.,PROmoting FITness and Health through Physical Activity Research Group (PROFITH), Department of Physical Education and Sports, Faculty of Sport Sciences, University of Granada, Granada, Spain
| | - Alejandro De-la-O
- Department of Medical Physiology, School of Medicine, University of Granada, Granada, Spain
| | - Guillermo Sanchez-Delgado
- PROmoting FITness and Health through Physical Activity Research Group (PROFITH), Department of Physical Education and Sports, Faculty of Sport Sciences, University of Granada, Granada, Spain
| | - Lidia Robles-Gonzalez
- Department of Medical Physiology, School of Medicine, University of Granada, Granada, Spain
| | - Lucas Jurado-Fasoli
- Department of Medical Physiology, School of Medicine, University of Granada, Granada, Spain
| | - Jonatan R Ruiz
- PROmoting FITness and Health through Physical Activity Research Group (PROFITH), Department of Physical Education and Sports, Faculty of Sport Sciences, University of Granada, Granada, Spain
| | - Angel Gutierrez
- Department of Medical Physiology, School of Medicine, University of Granada, Granada, Spain
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16
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Kemmler W, Weissenfels A, Willert S, Shojaa M, von Stengel S, Filipovic A, Kleinöder H, Berger J, Fröhlich M. Efficacy and Safety of Low Frequency Whole-Body Electromyostimulation (WB-EMS) to Improve Health-Related Outcomes in Non-athletic Adults. A Systematic Review. Front Physiol 2018; 9:573. [PMID: 29875684 PMCID: PMC5974506 DOI: 10.3389/fphys.2018.00573] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 04/30/2018] [Indexed: 12/18/2022] Open
Abstract
Exercise positively affects most risk factors, diseases and disabling conditions of middle to advanced age, however the majority of middle-aged to older people fall short of the exercise doses recommended for positively affecting cardio-metabolic, musculoskeletal and neurophysiological fitness or disabling conditions. Whole-Body Electromyostimulation (WB-EMS) may be a promising exercise technology for people unable or unmotivated to exercise conventionally. However, until recently there has been a dearth of evidence with respect to WB-EMS-induced effects on health-related outcomes. The aim of this systematic review is to summarize the effects, limitations and risks of WB-EMS as a preventive or therapeutic tool for non-athletic adults. Electronic searches in PubMed, Scopus, Web of Science, PsycINFO, Cochrane and Eric were run to identify randomized controlled trials, non-randomized controlled trials, meta-analyses of individual patient data and peer reviewed scientific theses that examined (1) WB-EMS-induced changes of musculoskeletal risk factors and diseases (2) WB-EMS-induced changes of functional capacity and physical fitness (3) WB-EMS-induced changes of cardio-metabolic risk factors and diseases (4) Risk factors of WB-EMS application and adverse effects during WB-EMS interventions. Two researchers independently reviewed articles for eligibility and methodological quality. Twenty-three eligible research articles generated by fourteen research projects were finally included. In summary, thirteen projects were WB-EMS trials and one study was a meta-analysis of individual patient data. WB-EMS significantly improves muscle mass and function while reducing fat mass and low back pain. Although there is some evidence of a positive effect of WB-EMS on cardio-metabolic risk factors, this aspect requires further detailed study. Properly applied and supervised, WB-EMS appears to be a safe training technology. In summary, WB-EMS represents a safe and reasonable option for cohorts unable or unwilling to join conventional exercise programs. However, much like all other types of exercise, WB-EMS does not affect every aspect of physical performance and health.
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Affiliation(s)
- Wolfgang Kemmler
- Institute of Medical Physics, University of Erlangen-Nürnberg, Erlangen, Germany.,Round-Table Whole-Body Electromyostimulation, Erlangen, Germany
| | - Anja Weissenfels
- Institute of Medical Physics, University of Erlangen-Nürnberg, Erlangen, Germany.,Round-Table Whole-Body Electromyostimulation, Erlangen, Germany
| | - Sebastian Willert
- Institute of Medical Physics, University of Erlangen-Nürnberg, Erlangen, Germany.,Round-Table Whole-Body Electromyostimulation, Erlangen, Germany
| | - Mahdieh Shojaa
- Institute of Medical Physics, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Simon von Stengel
- Institute of Medical Physics, University of Erlangen-Nürnberg, Erlangen, Germany.,Round-Table Whole-Body Electromyostimulation, Erlangen, Germany
| | - Andre Filipovic
- Round-Table Whole-Body Electromyostimulation, Erlangen, Germany.,Department of Training Sciences and Sports Informatics, German Sport University Cologne, Cologne, Germany
| | - Heinz Kleinöder
- Round-Table Whole-Body Electromyostimulation, Erlangen, Germany.,Department of Training Sciences and Sports Informatics, German Sport University Cologne, Cologne, Germany
| | - Joshua Berger
- Round-Table Whole-Body Electromyostimulation, Erlangen, Germany.,Department of Sports Science, University of Kaiserslautern, Kaiserslautern, Germany
| | - Michael Fröhlich
- Round-Table Whole-Body Electromyostimulation, Erlangen, Germany.,Department of Sports Science, University of Kaiserslautern, Kaiserslautern, Germany
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17
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Amaro-Gahete FJ, De-la-O A, Jurado-Fasoli L, Espuch-Oliver A, Robles-Gonzalez L, Navarro-Lomas G, de Haro T, Femia P, Castillo MJ, Gutierrez A. Exercise training as S-Klotho protein stimulator in sedentary healthy adults: Rationale, design, and methodology. Contemp Clin Trials Commun 2018; 11:10-19. [PMID: 30023455 PMCID: PMC6022251 DOI: 10.1016/j.conctc.2018.05.013] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 05/02/2018] [Accepted: 05/16/2018] [Indexed: 12/11/2022] Open
Abstract
Aims The secreted form of the α-Klotho gene (S-Klotho), which is considered a powerful biomarker of longevity, makes it an attractive target as an anti-ageing therapy against functional decline, sarcopenic obesity, metabolic and cardiovascular diseases, osteoporosis, and neurodegenerative disorders. The S-Klotho plasma levels could be related to physical exercise inasmuch physical exercise is involved in physiological pathways that regulate the S-Klotho plasma levels. FIT-AGEING will determine the effect of different training modalities on the S-Klotho plasma levels (primary outcome) in sedentary healthy adults. FIT-AGEING will also investigate the physiological consequences of activating the klotho gene (secondary outcomes). Methods FIT-AGEING will recruit 80 sedentary, healthy adults (50% women) aged 45–65 years old. Eligible participants will be randomly assigned to a non-exercise group, i.e. the control group, (n = 20), a physical activity recommendation from World Health Organization group (n = 20), a high intensity interval training group (n = 20), and a whole-body electromyostimulation group (n = 20). The laboratory measurements will be taken at the baseline and 12 weeks later including the S-Klotho plasma levels, physical fitness (cardiorespiratory fitness, muscular strength), body composition, basal metabolic rate, heart rate variability, maximal fat oxidation, health blood biomarkers, free-living physical activity, sleep habits, reaction time, cognitive variables, and health-related questionnaires. We will also obtain dietary habits data and cardiovascular disease risk factors.
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Affiliation(s)
- Francisco J Amaro-Gahete
- Department of Medical Physiology, School of Medicine, University of Granada, Spain.,PROmoting FITness and Health Through Physical Activity Research Group (PROFITH), Department of Physical Education and Sports, Faculty of Sport Sciences, University of Granada, Spain
| | - Alejandro De-la-O
- Department of Medical Physiology, School of Medicine, University of Granada, Spain
| | - Lucas Jurado-Fasoli
- Department of Medical Physiology, School of Medicine, University of Granada, Spain
| | - Andrea Espuch-Oliver
- Unidad de Gestión Clínica de Laboratorios Clínicos, Hospital, H.U. Virgen de Las Nieves, Ibs.Granada, Complejo Hospitalario de Granada, 18016, Granada, Spain
| | | | - Ginés Navarro-Lomas
- Department of Medical Physiology, School of Medicine, University of Granada, Spain
| | - Tomás de Haro
- Unidad de Gestión Clínica de Laboratorios Clínicos, H.U San Cecilio, Ibs.Granada, Complejo Hospitalario de Granada, 18016, Granada, Spain
| | - Pedro Femia
- Department of Statistics, Faculty of Medicine at the University of Granada, Granada, Spain
| | - Manuel J Castillo
- Department of Medical Physiology, School of Medicine, University of Granada, Spain
| | - Angel Gutierrez
- Department of Medical Physiology, School of Medicine, University of Granada, Spain
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Mechanical perturbations trigger endothelial nitric oxide synthase activity in human red blood cells. Sci Rep 2016; 6:26935. [PMID: 27345770 PMCID: PMC4921846 DOI: 10.1038/srep26935] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2015] [Accepted: 05/10/2016] [Indexed: 12/21/2022] Open
Abstract
Nitric oxide (NO), a vascular signaling molecule, is primarily produced by endothelial NO synthase. Recently, a functional endothelial NO synthase (eNOS) was described in red blood cells (RBC). The RBC-eNOS contributes to the intravascular NO pool and regulates physiological functions. However the regulatory mechanisms and clinical implications of RBC-eNOS are unknown. The present study investigated regulation and functions of RBC-eNOS under mechanical stimulation. This study shows that mechanical stimuli perturb RBC membrane, which triggers a signaling cascade to activate the eNOS. Extracellular NO level, estimated by the 4-Amino-5-Methylamino-2', 7'-Difluorofluorescein Diacetate probe, was significantly increased under mechanical stimuli. Immunostaining and western blot studies confirmed that the mechanical stimuli phosphorylate the serine 1177 moiety of RBC-eNOS, and activates the enzyme. The NO produced by activation of RBC-eNOS in vortexed RBCs promoted important endothelial functions such as migration and vascular sprouting. We also show that mechanical perturbation facilitates nitrosylation of RBC proteins via eNOS activation. The results of the study confirm that mechanical perturbations sensitize RBC-eNOS to produce NO, which ultimately defines physiological boundaries of RBC structure and functions. Therefore, we propose that mild physical perturbations before, after, or during storage can improve viability of RBCs in blood banks.
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