References of "Pirnay, Freddy"
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See detailShould we exclude elderly patients with chronic obstructive pulmonary disease from a long-time ambulatory pulmonary rehabilitation programme?
CORHAY, Jean-Louis ULg; NGUYEN DANG, Delphine ULg; DUYSINX, Bernard ULg et al

in Journal of Rehabilitation Medicine (2012), 44(5), 466-72

Objective: To assess the outcomes of a 6-month comprehensive multidisciplinary outpatient pulmonary rehabilitation programme in patients with chronic obstructive pulmonary disease according to age. Design ... [more ▼]

Objective: To assess the outcomes of a 6-month comprehensive multidisciplinary outpatient pulmonary rehabilitation programme in patients with chronic obstructive pulmonary disease according to age. Design: Prospective cohort study. Patients: A total of 140 patients with chronic obstructive pulmonary disease (Global Initiative for Chronic Obstructive Lung Disease (GOLD) 3-4) admitted to our centre for pulmonary rehabilitation. Methods: Patients were divided into 3 groups: group A (< 65 years), group B (65-74 years) and group C (>/= 75 years). All the patients received an education and individualized training programme. Pulmonary rehabilitation efficacy was evaluated at 6 months of treatment and 12 months post-treatment. Results: A total of 116 patients completed the pulmonary rehabilitation programme: 59 in group A (85.5%), 40 in group B (80%) and 17 in group C (80.9%). All the parameters studied (number of sessions, 6-min walking distance, isometric quadriceps strength, health-related quality of life, maximal load, peak oxygen uptake, maximal inspiratory and expiratory pressures) were significantly improved in each of the groups at 3 and 6 months compared with baseline. Moreover, percentage changes from baseline at 6 months for all of the parameters studied were not significantly different between age-groups. Conclusion: Pulmonary rehabilitation is efficient in elderly patients with severe and very severe chronic obstructive pulmonary disease, and their compliance with pulmonary rehabilitation was similar to that seen in younger groups. Therefore, elderly patients with chronic obstructive pulmonary disease should not be denied pulmonary rehabilitation. [less ▲]

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See detailRéhabilitation respiratoire dans la bronchopneumopathie chronique obstructive
CORHAY, Jean-Louis ULg; NGUYEN DANG, Delphine ULg; BURY, Thierry ULg et al

in EMC Pneumologie (2011)

Le traitement actuel de la bronchopneumopathie chronique obstructive (BPCO) doit comporter, outre un traitement médicamenteux optimal, une réhabilitation respiratoire (RR), de préférence ... [more ▼]

Le traitement actuel de la bronchopneumopathie chronique obstructive (BPCO) doit comporter, outre un traitement médicamenteux optimal, une réhabilitation respiratoire (RR), de préférence multidisciplinaire, et un programme de postrevalidation afin de maintenir les acquis. Il est en effet clairement démontré aujourd'hui que la RR permet d'améliorer la dyspnée, la tolérance à l'effort, l'activité physique et la qualité de vie des patients. De même, elle réduit le recours aux soins de santé et donc le coût de la maladie. Dans cette synthèse, nous présenterons ce qu'est la réhabilitation pulmonaire, ses indications et ses résultats, et la façon dont elle se déroule en ambulatoire. [less ▲]

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See detailLa rehabilitation pulmonaire dans la bronchopneumopathie chronique obstructive.
Corhay, Jean-Louis ULg; Nguyen Dang, Delphine ULg; Schees, Pierre ULg et al

in Revue Médicale de Liège (2008), 63(11), 677-83

The current treatment of chronic obstructive pulmonary disease (COPD) patients must comprise, in addition to an optimal pharmacological treatment, a pulmonary rehabilitation, if possible multidisciplinary ... [more ▼]

The current treatment of chronic obstructive pulmonary disease (COPD) patients must comprise, in addition to an optimal pharmacological treatment, a pulmonary rehabilitation, if possible multidisciplinary, and a program of post-rehabilitation in order to maintain the outcomes. Today pulmonary rehabilitation has proved to be effective in improving dyspnoea, exercise capacity and quality of life in COPD patients, and reducing the use of health services and thus the cost. In this article we want to present pulmonary rehabilitation, its indications and results, and the way by which it is held in the CHU of Liege. [less ▲]

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See detailLe réentrainement à l'effort du patient BPCO
Bury, Thierry ULg; Lange, B.; Pirnay, Freddy ULg

in Revue Médicale de Liège (2001), 56(5), 289-92

Rehabilitation for patients with chronic obstructive pulmonary disease (COPD) is well established and widely accepted as a means of enhancing standard therapy in order to alleviate symptoms and optimize ... [more ▼]

Rehabilitation for patients with chronic obstructive pulmonary disease (COPD) is well established and widely accepted as a means of enhancing standard therapy in order to alleviate symptoms and optimize function. The primary goal of rehabilitation is to restore the patient to the highest possible level of independent function. There is, however, no consensus on the optimal training modalities. Both walking and cycling improve exercise performance; there is substantial evidence that lower extremity exercise training should be included in rehabilitation programs for patients with COPD. [less ▲]

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See detailMarqueurs biologiques de souffrance musculaire et cardiaque pendant des contractions excentriques
Pirnay, Freddy ULg; Spadin, D.; Croisier, Jean-Louis ULg et al

in Actes de la Réunion Annuelle de la Société Belge de la Médecine et des Sciences du Sport (2000)

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See detailImmunological Status of Competitive Football Players During the Training Season
Bury, Thierry ULg; Marechal, R.; Mahieu, P. et al

in International Journal of Sports Medicine (1998), 19(5), 364-8

We investigated possible immunological changes in 15 professional football players before, during and after the sports season. We studied the leucocyte count as well as different functions such as T ... [more ▼]

We investigated possible immunological changes in 15 professional football players before, during and after the sports season. We studied the leucocyte count as well as different functions such as T-lymphocyte proliferation, NK activity, chemotaxis and phagocytosis of neutrophils. Training and competitions did not produce any change in the total number of leucocytes but increased neutrophil counts and decreased T4 lymphocyte counts. We also observed a slight decrease of T-lymphocyte proliferation and a significant decrease of neutrophil functions. On the other hand, training and competitions did not induce significant changes in the number of NK cells nor in the total NK cytotoxic activity. The different change observed tended to normalize after the sports season. Our results suggest a predominant neutrophil function depression in football players during a training season which could partly explain the susceptibility of elite athletes to infections. [less ▲]

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See detailBlood Mononuclear Cells Mobilization and Cytokines Secretion During Prolonged Exercises
Bury, Thierry ULg; Louis, Renaud ULg; Radermecker, Maurice ULg et al

in International Journal of Sports Medicine (1996), 17(2), 156-60

This study was designed to compare the effects of three prolonged exercises varying in their intensity and duration, on blood mononuclear cell mobilization and cytokine secretion (IL1(1)-IL(2)). Seven ... [more ▼]

This study was designed to compare the effects of three prolonged exercises varying in their intensity and duration, on blood mononuclear cell mobilization and cytokine secretion (IL1(1)-IL(2)). Seven healthy subjects underwent three effort trials (45 % VO(2)max during 4 h - 60% VO(2)max during 3 h - 75 % VO(2)max during 2 h) at one-month intervals. Blood samples were drawn before, different times during exercise and also after exercise. Prolonged exercises induced a transient increase in blood mononuclear cells which occurred across all intensity levels. We also observed a significant increase in plasma IL(1) level during exercise which correlates with the exercise intensity. The mean IL(1) level increased up to 2.5 times after the three proposed exercises (p <0.05). Plasma IL(2) level decreased at the end of prolonged exercises irrespective of the exercise intensity. No correlation was observed between blood mononuclear count and cytokine determination. Our data suggest that blood mononuclear cells mobilization is associated but not correlated with alterations of cytokine levels. [less ▲]

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See detailActivités sportives et système immunitaire
PIRNAY, Freddy ULg; Bury, Thierry ULg

in Médecine du sport : 100 ans de recherche et d’actions à l’Institut Malvoz (1996)

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See detailActivités sportives et système immunitaire
PIRNAY, Freddy ULg; Bury, Thierry ULg

in Médecine et Hygiène (1996), 54

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See detailChanges in breath 13CO2/12CO2 during exercise of different intensities.
Gautier, J. F.; Pirnay, Freddy ULg; Lacroix, M. et al

in Journal of Applied Physiology (Bethesda, Md. : 1985) (1996), 81(3), 1096-102

The measurement of breath 13CO2/12CO2 is commonly used during exercise to evaluate the oxidation rate of exogenous carbohydrates enriched in 13C. The aim of this study was to investigate whether exercise ... [more ▼]

The measurement of breath 13CO2/12CO2 is commonly used during exercise to evaluate the oxidation rate of exogenous carbohydrates enriched in 13C. The aim of this study was to investigate whether exercise itself affects the 13C/12C ratio in expired air CO2 in relation to exercise intensity. The relative abundance of 13C and 12C in expired air CO2 was determined by isotoperatio mass spectrometry and expressed as delta 13C (in %o) by using Craig's formula and calibrated standards. Five healthy young men exercised on a treadmill after an overnight fast during > or = 105 min on four occasions and in a randomized order. Work rates were performed at approximately 30, 45, 60, and 75% of their maximal O2 uptake (VO2max). Delta 13C in expired air CO2 and respiratory exchange ratio (RER) were determined every 15 or 30 min during exercise. At 30 and 45% VO2max, a slight and not statistically significant increase in delta 13C was observed at 30 min. In contrast, at 60 75% VO2max, the rise was statistically significant and averaged 0.83 and 0.99%o, respectively. Average delta 13C (between 0 and 105 min) progressively increased with the intensity of exercise. Individual values of delta 13C and RER were positively correlated (r = 0.653, P = 0.002) as were values of delta 13C and endogenous carbohydrates utilized (r = 0.752, P < 0.001). Factitious or "pseudooxidation" of a 13C-enriched exogenous glucose load (indeed noningested) was calculated from the changes in expired air delta 13C. Over the whole period of exercise it was not statistically significant at 30 and 40% VO2max. However, over the first 60 min of exercise, such pseudooxidation of exogenous glucose was significant at 30 and 45% VO2max. In conclusion, by modifying the mix of endogenous substrates oxidized, exercise at 60% VO2max and above significantly increases the 13C/12C ratio in expired air CO2. At these intensities, this could lead to overestimation of the oxidation of 13C-labeled substrates given orally. At lower intensities of exercise, such overestimation is much smaller an affects mainly the values recorded during the initial part of the exercise bout. [less ▲]

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See detailActivation of leucocytes after prolonged physical exercise
Bury, Thierry ULg; PIRNAY, Freddy ULg

in Mediators of Inflammation (1995), 4

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See detailEffect of prolonged exercise on neutrophil myeloperoxidase secretion
Bury, Thierry ULg; PIRNAY, Freddy ULg

in International Journal of Sports Medicine (1995)

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See detailExogenous glucose oxidation during exercise in relation to the power output.
Pirnay, Freddy ULg; Scheen, André ULg; Gautier, J. F. et al

in International Journal of Sports Medicine (1995), 16(7), 456-60

In order to study the influence of the power output on the oxidation rate of exogenous glucose and on the contribution of the various substrates to the energy demand, we combined the use of artificially ... [more ▼]

In order to study the influence of the power output on the oxidation rate of exogenous glucose and on the contribution of the various substrates to the energy demand, we combined the use of artificially enriched 13C-glucose with classical indirect calorimetry during uphill treadmill exercise. Six young male healthy subjects underwent three exercise bouts, in a randomized order and at least two weeks apart, at a low (45% VO2max, 1822 +/- 194 ml O2/min for 4 hours), moderate (60% VO2max, 2582 +/- 226 ml O2/min for 3 hours), and high intensity (75% VO2max, 3036 +/- 287 ml O2/min for 2 hours). After 10 min of exercise, each subject ingested 100 g of artificially 13C-labelled glucose dissolved in 400 ml of water. Over the four hours of the exercise at 45% VO2max, the amount of exogenous glucose oxidized was 89.5 +/- 5.9 g from the 100 g ingested. In all exercise bouts, the oxidation of exogenous glucose already began during the first 30 min after ingestion and peaked at 120 min. The maximum oxidation rates averaged 0.64 +/- 0.07, 0.75 +/- 0.04, and 0.63 +/- 0.08 g/min, and the mean amounts of exogenous glucose oxidized over the first two hours averaged 51.7 +/- 8.0, 61.5 +/- 6.6 and 50.9 +/- 8.45 g, at 45, 60 and 75% VO2max respectively. The contribution of the oxidation of exogenous glucose to the total energy supply progressively decreased when the power output increased, from 19.6 to 12.2%. In the meantime, the contribution of total carbohydrates (exogenous+endogenous) progressively increased from 55.1 to 77.8% while the contribution of lipids decreased from 35.5 to 16.6%. In conclusion, exogenous glucose ingested during exercise is largely oxidized and strongly contributes to the energy supply. The oxidation rate first increases with the power output, but levels off or even decreases at high intensity exercise. [less ▲]

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See detailAvailability of glucose ingested during muscle exercise performed under acipimox-induced lipolysis blockade.
Gautier, J. F.; Pirnay, Freddy ULg; Jandrain, Bernard ULg et al

in European Journal of Applied Physiology and Occupational Physiology (1994), 68(5), 406-12

This study investigated the percentage of carbohydrate utilization than can be accounted for by glucose ingested during exercise performed after the ingestion of the potent lipolysis inhibitor Acipimox ... [more ▼]

This study investigated the percentage of carbohydrate utilization than can be accounted for by glucose ingested during exercise performed after the ingestion of the potent lipolysis inhibitor Acipimox. Six healthy male volunteers exercised for 3 h on a treadmill at about 45% of their maximal oxygen uptake, 75 min after having ingested 250 mg of Acipimox. After 15-min adaptation to exercise, they ingested either glucose dissolved in water, 50 g at time 0 min and 25 g at time 60 and 120 min (glucose, G) or sweetened water (control, C). Naturally labelled [13C]glucose was used to follow the conversion of the ingested glucose to expired-air CO2. Acipimox inhibited lipolysis in a similar manner in both experimental conditions. This was reflected by an almost complete suppression of the exercise-induced increase in plasma free fatty acid and glycerol and by an almost constant rate of lipid oxidation. Total carbohydrate oxidation evaluated by indirect calorimetry, was similar in both experimental conditions [C, 182, (SEM 21); G, 194 (SEM 16) g.3 h-1], as was lipid oxidation [C, 57 (SEM 6); G, 61 (SEM 3) g.3 h-1]. Exogenous glucose oxidation during exercise G, calculated by the changes in 13C:12C ratio of expired air CO2, averaged 66 (SEM 5) g.3 h-1 (19% of the total energy requirement). Consequently, endogenous carbohydrate utilization was significantly smaller after glucose than after placebo ingestion: 128 (SEM 18) versus 182 (SEM 21) g.3 h-1, respectively (P < 0.05). Symptoms of intense fatigue and leg cramps observed with intake of sweet placebo were absent with glucose ingestion.(ABSTRACT TRUNCATED AT 250 WORDS) [less ▲]

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See detailEndogenous substrate oxidation during exercise and variations in breath 13CO2/12CO2.
Gautier, J. F.; Pirnay, Freddy ULg; Jandrain, Bernard ULg et al

in Journal of Applied Physiology (Bethesda, Md. : 1985) (1993), 74(1), 133-8

This study attempted to induce a major shift in the utilization of endogenous substrates during exercise in men by the use of a potent inhibitor of adipose tissue lipolysis, Acipimox, and to see to what ... [more ▼]

This study attempted to induce a major shift in the utilization of endogenous substrates during exercise in men by the use of a potent inhibitor of adipose tissue lipolysis, Acipimox, and to see to what extent this affects the 13C/12C ratio in expired air CO2. Six healthy volunteers exercised for 3 h on a treadmill at approximately 45% of their maximum O2 uptake, 75 min after having ingested either a placebo or 250 mg Acipimox. The rise in plasma free fatty acids and glycerol was almost totally prevented by Acipimox, and no significant rise in the utilization of lipids, evaluated by indirect calorimetry, was observed. Total carbohydrate oxidation averaged 128 +/- 17 (placebo) and 182 +/- 21 g/3 h (Acipimox). Conversely, total lipid oxidation was 84 +/- 5 (placebo) and 57 +/- 6 g/3 h (Acipimox; P < 0.01). Under placebo, changes in expired air CO2 delta 13C were minimal, with only a 0.49/1000 significant rise at 30 min. In contrast, under Acipimox, the rise in expired air CO2 delta 13C averaged 1/1000 and was significant throughout the 3-h exercise bout; in these conditions calculation of a "pseudooxidation" of an exogenous sugar naturally or artificially enriched in 13C, but not ingested, would have given an erroneous value of 19.8 +/- 2.6 g/3 h. Thus under conditions of extreme changes in endogenous substrate utilization, an appropriate control experiment is mandatory when studying exogenous substrate oxidation by 13C-labeled substrates and isotope-ratio mass spectrometry measurements on expired air CO2. [less ▲]

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See detailFructose utilization during exercise in men: rapid conversion of ingested fructose to circulating glucose.
Jandrain, Bernard ULg; Pallikarakis, N.; Normand, S. et al

in Journal of Applied Physiology (Bethesda, Md. : 1985) (1993), 74(5), 2146-54

The aim of the present study was to compare the metabolic fate of repeated doses of fructose or glucose ingested every 30 min during long-duration moderate-intensity exercise in men. Healthy volunteers ... [more ▼]

The aim of the present study was to compare the metabolic fate of repeated doses of fructose or glucose ingested every 30 min during long-duration moderate-intensity exercise in men. Healthy volunteers exercised for 3 h on a treadmill at 45% of their maximal oxygen consumption rate. "Naturally labeled" [13C]glucose or [13C]fructose was given orally at 25-g doses every 30 min (total feeding: 150 g; n = 6 in each group). Substrate utilization was evaluated by indirect calorimetry, and exogenous sugar oxidation was measured by isotope ratio mass spectrometry on expired CO2. Results were corrected for baseline drift in 13C/12C ratio in expired air due to exercise alone. Fructose conversion to plasma glucose was measured combining gas chromatography and isotope ratio mass spectrometry. Most of the ingested glucose was oxidized: 81 +/- 4 vs. 57 +/- 2 g/3 h for fructose (2P < 0.005). Exogenous glucose covered 20.8 +/- 1.4% of the total energy need (+/- 6.7 MJ) compared with 14.0 +/- 0.6% for fructose (2P < 0.005). The contribution of total carbohydrates was significantly higher and that of lipids significantly lower with glucose than with fructose. The blood glucose response was similar in both protocols. From 90 to 180 min, 55-60% of circulating glucose was derived from ingested fructose. In conclusion, when ingested repeatedly during moderate-intensity prolonged exercise, fructose is metabolically less available than glucose, despite a high rate of conversion to circulating glucose. [less ▲]

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See detailHistamine plasmatique et bronchospasme d'effort.
Bury, Thierry ULg; PIRNAY, Freddy ULg; CORHAY, Jean-Louis ULg et al

in Revue des Maladies Respiratoires (1990), 7(6), 559-62

The pathogenesis of bronchospasm of effort is not yet elucidated and it is probable that is determined by multiple factors. In this study we have tested the role of mastocytes in taking as an index of ... [more ▼]

The pathogenesis of bronchospasm of effort is not yet elucidated and it is probable that is determined by multiple factors. In this study we have tested the role of mastocytes in taking as an index of their activation the fluctuation of plasma histamine levels during repeated exercise tests. We will show that asthmatic subjects who develop bronchospasm on effort have a significant rise (times 3) in their level of serum histamine whilst normal subjects don't show much change. Furthermore in a repeated effort test we have observed a strict parallelism between the occurrence of bronchospasm of effort and a rise in plasma histamine levels. These different observations enable us to consider that the activation of mastocytes and the liberation of mediators which follow play an important role in the pathogenesis of bronchospasm of effort. [less ▲]

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See detailAlimentation avant, pendant et après l'exercice physique chez le sujet normal et diabétique
Jandrain, Bernard ULg; Lefèbvre, Pierre ULg; Pirnay, Freddy ULg et al

in Journées Annuelles de Diabetologie de l'Hôtel-Dieu (1990)

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See detailEffect of osmolality on availability of glucose ingested during prolonged exercise in humans.
Jandrain, Bernard ULg; Pirnay, Freddy ULg; Lacroix, M. et al

in Journal of Applied Physiology (Bethesda, Md. : 1985) (1989), 67(1), 76-82

The aim of this study was to investigate whether the osmolality of a glucose solution, ingested at the beginning of a prolonged exercise bout, affects exogenous glucose disposal. We investigated the ... [more ▼]

The aim of this study was to investigate whether the osmolality of a glucose solution, ingested at the beginning of a prolonged exercise bout, affects exogenous glucose disposal. We investigated the hormonal and metabolic response to a 50-g glucose load dissolved in either 200 (protocol A), 400 (protocol B), or 600 (protocol C) ml of water and given orally 15 min after adaptation to exercise in five healthy male volunteers. Naturally labeled [13C]glucose was used to follow the conversion of the ingested glucose to expired-air CO2. Total carbohydrate oxidation (indirect calorimetry) was similar in the three protocols (A, 237 +/- 20; B, 258 +/- 17; C, 276 +/- 20 g/4 h), as was lipid oxidation (A, 128 +/- 4; B, 132 +/- 15; C, 124 +/- 12 g/4 h). Exogenous glucose oxidation rates were similar under the three experimental conditions, and the total amount of exogenous glucose utilized was slightly, but not significantly, increased with the more diluted solution (A, 42.6 +/- 4.4; B, 43.4 +/- 4.1; C, 48.7 +/- 7.2 g/4 h). The blood glucose response was similar in the three protocols. Thus, within the range investigated, the osmolality of the glucose solution ingested had no significant influence either on its oxidation (which was 86-98% of the load ingested) or on the utilization of endogenous carbohydrate, lipid, or protein stores. [less ▲]

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