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Résultat de la recherche
11 résultat(s) recherche sur le mot-clé 'Exercise'
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Efficacy and potential determinants of exercise therapy in knee and hip osteoarthritis: A systematic review and meta-analysis / Siew-Li Goh in Annals of physical and rehabilitation medicine, Vol. 62, n°5 (Septembre 2019)
[article]
Titre : Efficacy and potential determinants of exercise therapy in knee and hip osteoarthritis: A systematic review and meta-analysis Type de document : texte imprimé Auteurs : Siew-Li Goh ; Monica S.M. Persson ; Joanne Stocks ; Yunfei Hou ; Jianhao Lin ; Michelle C. Hall ; Michael Doherty ; Weiya Zhang Année de publication : 2019 Article en page(s) : p. 356-365 Note générale : doi.org/10.1016/j.rehab.2019.04.006 Langues : Anglais (eng) Mots-clés : Knee osteoarthritis Exercise Meta-analysis Determinants Physical therapy Pain Function Quality of Life Résumé : Background
Exercise is an effective treatment for osteoarthritis. However, the effect may vary from one patient (or study) to another.
Objective
To evaluate the efficacy of exercise and its potential determinants for pain, function, performance, and quality of life (QoL) in knee and hip osteoarthritis (OA).
Methods
We searched 9 electronic databases (AMED, CENTRAL, CINAHL, EMBASE, MEDLINE Ovid, PEDro, PubMed, SPORTDiscus and Google Scholar) for reports of randomised controlled trials (RCTs) comparing exercise-only interventions with usual care. The search was performed from inception up to December 2017 with no language restriction. The effect size (ES), with its 95% confidence interval (CI), was calculated on the basis of between-group standardised mean differences. The primary endpoint was at or nearest to 8 weeks. Other outcome time points were grouped into intervals, from < 1 month to ≥ 18 months, for time-dependent effects analysis. Potential determinants were explored by subgroup analyses. Level of significance was set at P ≤ 0.10.
Results
Data from 77 RCTs (6472 participants) confirmed statistically significant exercise benefits for pain (ES 0.56, 95% CI 0.44–0.68), function (0.50, 0.38–0.63), performance (0.46, 0.35–0.57), and QoL (0.21, 0.11–0.31) at or nearest to 8 weeks. Across all outcomes, the effects appeared to peak around 2 months and then gradually decreased and became no better than usual care after 9 months. Better pain relief was reported by trials investigating participants who were younger (mean age < 60 years), had knee OA, and were not awaiting joint replacement surgery.
Conclusions
Exercise significantly reduces pain and improves function, performance and QoL in people with knee and hip OA as compared with usual care at 8 weeks. The effects are maximal around 2 months and thereafter slowly diminish, being no better than usual care at 9 to 18 months. Participants with younger age, knee OA and not awaiting joint replacement may benefit more from exercise therapy. These potential determinants, identified by study-level analyses, may have implied ecological bias and need to be confirmed with individual patient data.En ligne : https://www.sciencedirect.com/science/article/pii/S1877065719300624 Permalink : ./index.php?lvl=notice_display&id=84153
in Annals of physical and rehabilitation medicine > Vol. 62, n°5 (Septembre 2019) . - p. 356-365[article] Efficacy and potential determinants of exercise therapy in knee and hip osteoarthritis: A systematic review and meta-analysis [texte imprimé] / Siew-Li Goh ; Monica S.M. Persson ; Joanne Stocks ; Yunfei Hou ; Jianhao Lin ; Michelle C. Hall ; Michael Doherty ; Weiya Zhang . - 2019 . - p. 356-365.
doi.org/10.1016/j.rehab.2019.04.006
Langues : Anglais (eng)
in Annals of physical and rehabilitation medicine > Vol. 62, n°5 (Septembre 2019) . - p. 356-365
Mots-clés : Knee osteoarthritis Exercise Meta-analysis Determinants Physical therapy Pain Function Quality of Life Résumé : Background
Exercise is an effective treatment for osteoarthritis. However, the effect may vary from one patient (or study) to another.
Objective
To evaluate the efficacy of exercise and its potential determinants for pain, function, performance, and quality of life (QoL) in knee and hip osteoarthritis (OA).
Methods
We searched 9 electronic databases (AMED, CENTRAL, CINAHL, EMBASE, MEDLINE Ovid, PEDro, PubMed, SPORTDiscus and Google Scholar) for reports of randomised controlled trials (RCTs) comparing exercise-only interventions with usual care. The search was performed from inception up to December 2017 with no language restriction. The effect size (ES), with its 95% confidence interval (CI), was calculated on the basis of between-group standardised mean differences. The primary endpoint was at or nearest to 8 weeks. Other outcome time points were grouped into intervals, from < 1 month to ≥ 18 months, for time-dependent effects analysis. Potential determinants were explored by subgroup analyses. Level of significance was set at P ≤ 0.10.
Results
Data from 77 RCTs (6472 participants) confirmed statistically significant exercise benefits for pain (ES 0.56, 95% CI 0.44–0.68), function (0.50, 0.38–0.63), performance (0.46, 0.35–0.57), and QoL (0.21, 0.11–0.31) at or nearest to 8 weeks. Across all outcomes, the effects appeared to peak around 2 months and then gradually decreased and became no better than usual care after 9 months. Better pain relief was reported by trials investigating participants who were younger (mean age < 60 years), had knee OA, and were not awaiting joint replacement surgery.
Conclusions
Exercise significantly reduces pain and improves function, performance and QoL in people with knee and hip OA as compared with usual care at 8 weeks. The effects are maximal around 2 months and thereafter slowly diminish, being no better than usual care at 9 to 18 months. Participants with younger age, knee OA and not awaiting joint replacement may benefit more from exercise therapy. These potential determinants, identified by study-level analyses, may have implied ecological bias and need to be confirmed with individual patient data.En ligne : https://www.sciencedirect.com/science/article/pii/S1877065719300624 Permalink : ./index.php?lvl=notice_display&id=84153 Exemplaires (1)
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Exclu du prêtForced Aerobic Exercise Enhances Motor Recovery After Stroke: A Case Report / Susan M. Linder in American Journal of Occupational Therapy, Vol. 69/4 (Juillet-Août 2015)
[article]
Titre : Forced Aerobic Exercise Enhances Motor Recovery After Stroke: A Case Report Type de document : texte imprimé Auteurs : Susan M. Linder, Auteur ; Anson B. Rosenfeldt, Auteur ; Matthew Rasanow, Auteur Année de publication : 2015 Article en page(s) : 6904210010p1-6904210010p8 Langues : Anglais (eng) Mots-clés : Aerobic exercise cerebrovascular accident ischemic stroke exercise Résumé : OBJECTIVE. Previously, we demonstrated that forced aerobic exercise (FE) increases the pattern of neural activation in Parkinson’s disease. We sought to evaluate whether FE, when coupled with repetitive task practice, could promote motor recovery poststroke.
METHOD. A 46-yr-old man with ischemic stroke exhibited chronic residual upper-extremity deficits, scoring 35/66 on the Fugl-Meyer Assessment (FMA) at baseline. He completed 24 training sessions comprising 45 min of FE on a motorized stationary bicycle followed by 45 min of upper-extremity repetitive task practice.
RESULTS. From baseline to end of treatment, the FMA score improved by 20 points, perceived level of recovery on the Stroke Impact Scale increased by 20 percentage points, and cardiovascular function measured by peak oxygen uptake improved 30%. These improvements persisted 4 wk after the intervention ceased.
CONCLUSION. FE may be a safe and feasible rehabilitation approach to augment recovery of motor and nonmotor function while improving aerobic fitness in people with chronic stroke.Permalink : ./index.php?lvl=notice_display&id=40413
in American Journal of Occupational Therapy > Vol. 69/4 (Juillet-Août 2015) . - 6904210010p1-6904210010p8[article] Forced Aerobic Exercise Enhances Motor Recovery After Stroke: A Case Report [texte imprimé] / Susan M. Linder, Auteur ; Anson B. Rosenfeldt, Auteur ; Matthew Rasanow, Auteur . - 2015 . - 6904210010p1-6904210010p8.
Langues : Anglais (eng)
in American Journal of Occupational Therapy > Vol. 69/4 (Juillet-Août 2015) . - 6904210010p1-6904210010p8
Mots-clés : Aerobic exercise cerebrovascular accident ischemic stroke exercise Résumé : OBJECTIVE. Previously, we demonstrated that forced aerobic exercise (FE) increases the pattern of neural activation in Parkinson’s disease. We sought to evaluate whether FE, when coupled with repetitive task practice, could promote motor recovery poststroke.
METHOD. A 46-yr-old man with ischemic stroke exhibited chronic residual upper-extremity deficits, scoring 35/66 on the Fugl-Meyer Assessment (FMA) at baseline. He completed 24 training sessions comprising 45 min of FE on a motorized stationary bicycle followed by 45 min of upper-extremity repetitive task practice.
RESULTS. From baseline to end of treatment, the FMA score improved by 20 points, perceived level of recovery on the Stroke Impact Scale increased by 20 percentage points, and cardiovascular function measured by peak oxygen uptake improved 30%. These improvements persisted 4 wk after the intervention ceased.
CONCLUSION. FE may be a safe and feasible rehabilitation approach to augment recovery of motor and nonmotor function while improving aerobic fitness in people with chronic stroke.Permalink : ./index.php?lvl=notice_display&id=40413 Exemplaires (1)
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Exclu du prêtLimited effect of a self-management exercise program added to spa therapy for increasing physical activity in patients with knee osteoarthritis : A quasi-randomized controlled trial / Chloé Gay in Annals of physical and rehabilitation medicine, Vol. 63, n°3 (Mai-Juin 2020)
[article]
Titre : Limited effect of a self-management exercise program added to spa therapy for increasing physical activity in patients with knee osteoarthritis : A quasi-randomized controlled trial Type de document : texte imprimé Auteurs : Chloé Gay ; Candy Guiguet-Auclair ; Nicolas Coste ; Nathalie Boisseau ; Laurent Gerbaud ; Bruno Pereira ; Emmanuel Coudeyre Année de publication : 2020 Article en page(s) : p. 181-188 Note générale : doi.org/10.1016/j.rehab.2019.10.006 Langues : Anglais (eng) Mots-clés : Physical activity level Exercise Osteoarthritis Education Self-management Résumé : Background
The efficacy of spa therapy in osteoarthritis (OA) has ever been demonstrated, with a good level of evidence for pain and disability. The effect of a self-management program with spa therapy on physical activity (PA) level has never been demonstrated.
Objective
This study aimed to assess, at 3 months, the effectiveness of 5 sessions of a self-management exercise program in patients with knee OA (KOA) who benefit from 18 days of spa therapy and received an information booklet (on proposed physical exercises) on improvement in at least one PA level.
Methods
This was an interventional, multicentre, quasi-randomized controlled trial with a cluster randomized design (1-month period). People 50 to 75 years old with symptomatic knee OA were included in 3 spa therapy centres in France (Bourbon Lancy, Le Mont Dore, Royat). Both groups received conventional spa therapy sessions during 18 days and an information booklet on the benefits of PA practice for KOA. The intervention group additionally received 5 self-management exercise sessions. The main outcome was improvement in at least one PA level according to the International Physical Activity Questionnaire (IPAQ) short-form categorical score (low to moderate or high, or moderate to high) at 3 months. Secondary outcomes were the evolution of PA (MET-min/week), disability, pain, anxiety, depression, self-efficacy, fears and beliefs concerning KOA, barriers to and facilitators of regular PA practice, consumption of painkillers and adherence to physical exercise program at 3 months. Assessors but not participants or caregivers were blinded.
Results
In total, 123 patients were randomized, 54 to the intervention group and 69 to the control group. Considering the main outcome, at 3 months, 37% of patients in the intervention group showed improvement in at least one PA level according to the IPAQ categorical score versus 30.4% in the control group (P = 0.44). In the intervention group, 13 (24.1%) patients showed improvement from low to moderate PA level (vs. 8 [11.6%] in the control group), 2 (3.7%) from low to high (vs. 2 [2.9%]) and 5 (9.3%) from moderate to highvs. 11 [15.9%]). Both intervention and control groups showed increased IPAQ continuous scores (MET-min/week) at 3 months, although not significantly. HAD anxiety and depression scores were significantly reduced in the intervention group (P = 0.001 and P = 0.049, respectively) and the perception of PA was better in the intervention than control group for motivation and barriers scores (P = 0.019 and P = 0.002, respectively).
Conclusions
This study showed the lack of impact of a short self-management program on PA level in addition to 18-day spa therapy for KOA, but both intervention and control groups showed improved PA level.Permalink : ./index.php?lvl=notice_display&id=90793
in Annals of physical and rehabilitation medicine > Vol. 63, n°3 (Mai-Juin 2020) . - p. 181-188[article] Limited effect of a self-management exercise program added to spa therapy for increasing physical activity in patients with knee osteoarthritis : A quasi-randomized controlled trial [texte imprimé] / Chloé Gay ; Candy Guiguet-Auclair ; Nicolas Coste ; Nathalie Boisseau ; Laurent Gerbaud ; Bruno Pereira ; Emmanuel Coudeyre . - 2020 . - p. 181-188.
doi.org/10.1016/j.rehab.2019.10.006
Langues : Anglais (eng)
in Annals of physical and rehabilitation medicine > Vol. 63, n°3 (Mai-Juin 2020) . - p. 181-188
Mots-clés : Physical activity level Exercise Osteoarthritis Education Self-management Résumé : Background
The efficacy of spa therapy in osteoarthritis (OA) has ever been demonstrated, with a good level of evidence for pain and disability. The effect of a self-management program with spa therapy on physical activity (PA) level has never been demonstrated.
Objective
This study aimed to assess, at 3 months, the effectiveness of 5 sessions of a self-management exercise program in patients with knee OA (KOA) who benefit from 18 days of spa therapy and received an information booklet (on proposed physical exercises) on improvement in at least one PA level.
Methods
This was an interventional, multicentre, quasi-randomized controlled trial with a cluster randomized design (1-month period). People 50 to 75 years old with symptomatic knee OA were included in 3 spa therapy centres in France (Bourbon Lancy, Le Mont Dore, Royat). Both groups received conventional spa therapy sessions during 18 days and an information booklet on the benefits of PA practice for KOA. The intervention group additionally received 5 self-management exercise sessions. The main outcome was improvement in at least one PA level according to the International Physical Activity Questionnaire (IPAQ) short-form categorical score (low to moderate or high, or moderate to high) at 3 months. Secondary outcomes were the evolution of PA (MET-min/week), disability, pain, anxiety, depression, self-efficacy, fears and beliefs concerning KOA, barriers to and facilitators of regular PA practice, consumption of painkillers and adherence to physical exercise program at 3 months. Assessors but not participants or caregivers were blinded.
Results
In total, 123 patients were randomized, 54 to the intervention group and 69 to the control group. Considering the main outcome, at 3 months, 37% of patients in the intervention group showed improvement in at least one PA level according to the IPAQ categorical score versus 30.4% in the control group (P = 0.44). In the intervention group, 13 (24.1%) patients showed improvement from low to moderate PA level (vs. 8 [11.6%] in the control group), 2 (3.7%) from low to high (vs. 2 [2.9%]) and 5 (9.3%) from moderate to highvs. 11 [15.9%]). Both intervention and control groups showed increased IPAQ continuous scores (MET-min/week) at 3 months, although not significantly. HAD anxiety and depression scores were significantly reduced in the intervention group (P = 0.001 and P = 0.049, respectively) and the perception of PA was better in the intervention than control group for motivation and barriers scores (P = 0.019 and P = 0.002, respectively).
Conclusions
This study showed the lack of impact of a short self-management program on PA level in addition to 18-day spa therapy for KOA, but both intervention and control groups showed improved PA level.Permalink : ./index.php?lvl=notice_display&id=90793 Exemplaires (1)
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Exclu du prêtCardiorespiratory demand and rate of perceived exertion during overground walking with a robotic exoskeleton in long-term manual wheelchair users with chronic spinal cord injury: A cross-sectional study / Manuel J. Escalona in Annals of physical and rehabilitation medicine, Vol. 61, n°4 (Juillet 2018)
[article]
Titre : Cardiorespiratory demand and rate of perceived exertion during overground walking with a robotic exoskeleton in long-term manual wheelchair users with chronic spinal cord injury: A cross-sectional study Type de document : texte imprimé Auteurs : Manuel J. Escalona ; Rachel Brosseau ; Martin Vermette ; Alain Steve Comtois ; Cyril Duclos ; Mylène Aubertin-Leheudre ; Dany H. Gagnon Année de publication : 2018 Article en page(s) : p. 215-223 Note générale : Doi : 10.1016/j.rehab.2017.12.008 Langues : Anglais (eng) Mots-clés : Spinal cord injuries Exercise Rehabilitation Technology Physical fitness Oxygen consumption Résumé : Background
Many wheelchair users adopt a sedentary lifestyle, which results in progressive physical deconditioning with increased risk of musculoskeletal, cardiovascular and endocrine/metabolic morbidity and mortality. Engaging in a walking program with an overground robotic exoskeleton may be an effective strategy for mitigating these potential negative health consequences and optimizing fitness in this population. However, additional research is warranted to inform the development of adapted physical activity programs incorporating this technology.
Objectives
To determine cardiorespiratory demands during sitting, standing and overground walking with a robotic exoskeleton and to verify whether such overground walking results in at least moderate-intensity physical exercise.
Methods
We enrolled 13 long-term wheelchair users with complete motor spinal cord injury in a walking program with an overground robotic exoskeleton. Cardiorespiratory measures and rate of perceived exertion (RPE) were recorded by using a portable gas analyzer system during sitting, standing and four 10m walking tasks with the robotic exoskeleton. Each participant also performed an arm crank ergometer test to determine maximal cardiorespiratory ability (i.e., peak heart rate and O2 uptake [HRpeak, VO2peak]).
Results
Cardiorespiratory measures increased by a range of 9%–35% from sitting to standing and further increased by 22%–52% from standing to walking with the robotic exoskeleton. During walking, median oxygen cost (O2Walking), relative HR (%HRpeak), relative O2 consumption (%VO2peak) and respiratory exchange ratio (RER) reached 0.29mL/kg/m, 82.9%, 41.8% and 0.9, respectively, whereas median RPE reached 3.2/10. O2Walking was moderately influenced by total number of sessions and steps taken with the robotic exoskeleton since the start of the walking program.
Conclusion
Overground walking with the robotic exoskeleton over a short distance allowed wheelchair users to achieve a moderate-intensity level of exercise. Hence, an overground locomotor training program with a robotic exoskeleton may have cardiorespiratory health benefits in the population studied.Permalink : ./index.php?lvl=notice_display&id=80593
in Annals of physical and rehabilitation medicine > Vol. 61, n°4 (Juillet 2018) . - p. 215-223[article] Cardiorespiratory demand and rate of perceived exertion during overground walking with a robotic exoskeleton in long-term manual wheelchair users with chronic spinal cord injury: A cross-sectional study [texte imprimé] / Manuel J. Escalona ; Rachel Brosseau ; Martin Vermette ; Alain Steve Comtois ; Cyril Duclos ; Mylène Aubertin-Leheudre ; Dany H. Gagnon . - 2018 . - p. 215-223.
Doi : 10.1016/j.rehab.2017.12.008
Langues : Anglais (eng)
in Annals of physical and rehabilitation medicine > Vol. 61, n°4 (Juillet 2018) . - p. 215-223
Mots-clés : Spinal cord injuries Exercise Rehabilitation Technology Physical fitness Oxygen consumption Résumé : Background
Many wheelchair users adopt a sedentary lifestyle, which results in progressive physical deconditioning with increased risk of musculoskeletal, cardiovascular and endocrine/metabolic morbidity and mortality. Engaging in a walking program with an overground robotic exoskeleton may be an effective strategy for mitigating these potential negative health consequences and optimizing fitness in this population. However, additional research is warranted to inform the development of adapted physical activity programs incorporating this technology.
Objectives
To determine cardiorespiratory demands during sitting, standing and overground walking with a robotic exoskeleton and to verify whether such overground walking results in at least moderate-intensity physical exercise.
Methods
We enrolled 13 long-term wheelchair users with complete motor spinal cord injury in a walking program with an overground robotic exoskeleton. Cardiorespiratory measures and rate of perceived exertion (RPE) were recorded by using a portable gas analyzer system during sitting, standing and four 10m walking tasks with the robotic exoskeleton. Each participant also performed an arm crank ergometer test to determine maximal cardiorespiratory ability (i.e., peak heart rate and O2 uptake [HRpeak, VO2peak]).
Results
Cardiorespiratory measures increased by a range of 9%–35% from sitting to standing and further increased by 22%–52% from standing to walking with the robotic exoskeleton. During walking, median oxygen cost (O2Walking), relative HR (%HRpeak), relative O2 consumption (%VO2peak) and respiratory exchange ratio (RER) reached 0.29mL/kg/m, 82.9%, 41.8% and 0.9, respectively, whereas median RPE reached 3.2/10. O2Walking was moderately influenced by total number of sessions and steps taken with the robotic exoskeleton since the start of the walking program.
Conclusion
Overground walking with the robotic exoskeleton over a short distance allowed wheelchair users to achieve a moderate-intensity level of exercise. Hence, an overground locomotor training program with a robotic exoskeleton may have cardiorespiratory health benefits in the population studied.Permalink : ./index.php?lvl=notice_display&id=80593 Exemplaires (1)
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Exclu du prêtExercice de haute intensité et variations du pH salivaire en hypoxie / S. Julia-Sanchez in Science & sports, vol.29 n°6 (Décembre 2014)
[article]
Titre : Exercice de haute intensité et variations du pH salivaire en hypoxie Titre original : Salivary pH increases after jump exercises in hypoxia Type de document : texte imprimé Auteurs : S. Julia-Sanchez, Auteur ; J. Alvarez-Herms, Auteur Année de publication : 2014 Article en page(s) : p.306-310 Langues : Français (fre) Mots-clés : Salivary pH Exercise Hypoxia Anaerobic metabolism pH salivaire Exercice Hypoxie Métabolisme anaérobique Résumé : Objectives
The purpose of the present study was to determine if high intensity exercise performed in hypoxia could affect the salivary pH response in comparison to normoxia.
Methods
Eight healthy and physically active subjects performed a randomized single blinded protocol consisting in six sets of 15 seconds stretch-shortening-cycles (SSC) jumping at three different conditions: (T1) baseline test at 550m altitude, (T2) at 2500m simulated altitude (O2=16.4%), and (T3) at 4000m simulated altitude (O2=13.4%). Non-stimulated whole saliva samples were collected for all subjects before and after the exercise. Blood lactate, oxygen saturation and heart rate were measured to assess the anaerobic character of the test.
Results
The results revealed an increase in salivary pH values after the exercise, only reaching significance for altitude conditions (T2, P=0.009; T3, P=0.026). No significant differences in blood lactate were detected when comparing the three experimental conditions.
Conclusions
Our results suggest that exercise performed in normobaric hypoxia has stronger effects in saliva alkalinization than when performed under normoxia. As salivary pH is strongly associated with caries incidence, more research is needed to assess the clinical significance of changes in salivary pH due to intense exercise in normobaric hypoxia.
Objectifs
Le but de notre étude était de déterminer si l’exercice de haute intensité réalisé en hypoxie peut affecter la réponse du pH salivaire par rapport à la normoxie.
Sujets et méthodes
Huit sujets ont participé à un protocole simple et aléatoire à l’aveugle. Le protocole d’exécution composé de six séries de cycles d’étirement-raccourcissement, de 15 secondes d’écart, sous trois conditions différentes : (T1) test de référence à 550m d’altitude, (T2) en simulation d’altitude 2500m (O2=16,4 %) et (T3) à l’altitude simulée 4000m (O2=13,4 %). Des échantillons de salive non stimulées ont été recueillies avant et après l’exercice. Le lactate de sang, la saturation en oxygène et la fréquence cardiaque ont été mesurés afin d’évaluer le caractère anaérobique de l’essai.
Résultats
Nos résultats ont révélé une augmentation des valeurs de pH salivaire après l’exercice, atteignant la signification statistique pour des tests développés en altitude (T2, p=0,009 ; T3, p=0,026).
Conclusion
Nos résultats suggèrent que l’exercice en hypoxie normobarique provoque une alcalinisation accrue de la salive que lorsqu’elles sont réalisées sous normoxie. Le pH salivaire étant fortement associé à l’incidence des caries, des recherches supplémentaires sont nécessaires pour évaluer la signification clinique des modifications de pH salivaire dû à un exercice intense en hypoxie normobarique.Permalink : ./index.php?lvl=notice_display&id=34197
in Science & sports > vol.29 n°6 (Décembre 2014) . - p.306-310[article] Exercice de haute intensité et variations du pH salivaire en hypoxie = Salivary pH increases after jump exercises in hypoxia [texte imprimé] / S. Julia-Sanchez, Auteur ; J. Alvarez-Herms, Auteur . - 2014 . - p.306-310.
Langues : Français (fre)
in Science & sports > vol.29 n°6 (Décembre 2014) . - p.306-310
Mots-clés : Salivary pH Exercise Hypoxia Anaerobic metabolism pH salivaire Exercice Hypoxie Métabolisme anaérobique Résumé : Objectives
The purpose of the present study was to determine if high intensity exercise performed in hypoxia could affect the salivary pH response in comparison to normoxia.
Methods
Eight healthy and physically active subjects performed a randomized single blinded protocol consisting in six sets of 15 seconds stretch-shortening-cycles (SSC) jumping at three different conditions: (T1) baseline test at 550m altitude, (T2) at 2500m simulated altitude (O2=16.4%), and (T3) at 4000m simulated altitude (O2=13.4%). Non-stimulated whole saliva samples were collected for all subjects before and after the exercise. Blood lactate, oxygen saturation and heart rate were measured to assess the anaerobic character of the test.
Results
The results revealed an increase in salivary pH values after the exercise, only reaching significance for altitude conditions (T2, P=0.009; T3, P=0.026). No significant differences in blood lactate were detected when comparing the three experimental conditions.
Conclusions
Our results suggest that exercise performed in normobaric hypoxia has stronger effects in saliva alkalinization than when performed under normoxia. As salivary pH is strongly associated with caries incidence, more research is needed to assess the clinical significance of changes in salivary pH due to intense exercise in normobaric hypoxia.
Objectifs
Le but de notre étude était de déterminer si l’exercice de haute intensité réalisé en hypoxie peut affecter la réponse du pH salivaire par rapport à la normoxie.
Sujets et méthodes
Huit sujets ont participé à un protocole simple et aléatoire à l’aveugle. Le protocole d’exécution composé de six séries de cycles d’étirement-raccourcissement, de 15 secondes d’écart, sous trois conditions différentes : (T1) test de référence à 550m d’altitude, (T2) en simulation d’altitude 2500m (O2=16,4 %) et (T3) à l’altitude simulée 4000m (O2=13,4 %). Des échantillons de salive non stimulées ont été recueillies avant et après l’exercice. Le lactate de sang, la saturation en oxygène et la fréquence cardiaque ont été mesurés afin d’évaluer le caractère anaérobique de l’essai.
Résultats
Nos résultats ont révélé une augmentation des valeurs de pH salivaire après l’exercice, atteignant la signification statistique pour des tests développés en altitude (T2, p=0,009 ; T3, p=0,026).
Conclusion
Nos résultats suggèrent que l’exercice en hypoxie normobarique provoque une alcalinisation accrue de la salive que lorsqu’elles sont réalisées sous normoxie. Le pH salivaire étant fortement associé à l’incidence des caries, des recherches supplémentaires sont nécessaires pour évaluer la signification clinique des modifications de pH salivaire dû à un exercice intense en hypoxie normobarique.Permalink : ./index.php?lvl=notice_display&id=34197 Exemplaires (1)
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Exclu du prêtHigh sedentary behaviour and low physical activity levels at 12 months after cardiac rehabilitation: A prospective cohort study / Nicole Freene in Annals of physical and rehabilitation medicine, Vol. 63, n°1 (Janvier 2020)
PermalinkA prospective study examining the influence of cardiac rehabilitation on the sedentary time of highly sedentary, physically inactive patients / A. Biswas in Annals of physical and rehabilitation medicine, Vol. 61, n°4 (Juillet 2018)
PermalinkSpecific exercises reduce the need for bracing in adolescents with idiopathic scoliosis: A practical clinical trial / Stefano Negrini in Annals of physical and rehabilitation medicine, Vol. 62, n°2 (Mars 2019)
PermalinkLes effets de la pratique régulière d'exercices ou d'une activité physique chez le patient atteint de spondylarthrite ankylosante / Julie Serlet
PermalinkAttentional processes and performance in hot humid or dryenvironments: review, applied recommendation and new researchdirections / Nicolas Robin in Science & motricité, 112 ([23/11/2021])
Permalink