Low‐intensity training dissociates metabolic from aerobic fitness

Helge, Jørn Wulff; Damsgaard, Rasmus; Overgaard, Kristian; Andersen, Jesper L.; Donsmark, Morten; Dyrskog, Stig; Hermansen, Kjeld; Saltin, Bengt; Daugaard, Jens R.

doi:10.1111/j.1600-0838.2006.00604.x

Cited by 27 publications

(44 citation statements)

References 40 publications

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“…Data from Helge et al suggest that exercise at low workload for several weeks could also modify fuel selection during exercise, but the direction of these changes was different in these two studies conducted during 48- (Helge et al 2003) and 38-day ski treks (Helge et al 2008) in four and seven subjects, respectively. In both studies the respiratory exchange ratio (RER) was measured during 10-or 15-min arm cranking (at 40-50 and 100 W) and cycling exercise (at 100 and 200 W).…”

Section: Introductionmentioning

confidence: 94%

“…These changes in the capacity to transport plasma glucose into muscle fibers could favor plasma glucose oxidation and a shift to carbohydrate (CHO) oxidation during prolonged exercise at low workload particularly in subjects supplemented with CHO both before and during exercise. However, in the experiment by Helge et al (2003Helge et al ( , 2008 plasma glucose oxidation was not measured and the subjects were studied following an overnight fast which favors fat oxidation particularly at low workload (Achten and Jeukendrup 2003). The putative metabolic adaptations brought about by several week of prolonged exercise at low workload with a ''continuous pattern of eating'' (Westerterp 2001) could be more pronounced in subjects supplemented with CHO than in a fasting state.…”

Section: Introductionmentioning

confidence: 98%

“…The effect of exercise at low workload for several weeks has only been described in a limited number of studies conducted during an offshore race (Branth et al 1996) and simulated (Schantz et al 1983) or real cross-country ski treks (Frykman et al 2003;Helge et al 2003Helge et al , 2006Helge et al , 2008Stroud et al 1993Stroud et al , 1997. This type of exercises is characterized by a sustained increase in energy expenditure (physical activity level, or PAL [2.2 to 3.9 times the resting metabolic rate, in the above quoted studies) and, accordingly, most of these studies have focused on energy balance and on the reduction of body mass, which is an almost constant finding.…”

Section: Introductionmentioning

confidence: 99%

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Effect of a 20-day ski trek on fuel selection during prolonged exercise at low workload with ingestion of 13C-glucose

Péronnet

Abdelaoui

Lavoie³

et al. 2009

Eur J Appl Physiol

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Fuel selection was measured in five subjects (36.0 +/- 10.5 years old; 87.3 +/- 12.5 kg; mean +/- SD) during a 120-min tethered walking with ski poles (1.12 l O(2) min(-1)) with ingestion of (13)C-glucose (1.5 g kg(-1)), before and after a 20-day 415-km ski trek [physical activity level (PAL) approximately 3], using respiratory calorimetry, urea excretion, and (13)C/(12)C in expired CO(2) and in plasma glucose. Before the ski trek, protein oxidation contributed 9.7 +/- 1.6% to the energy yield (%En) while fat and carbohydrate (CHO) oxidation provided 73.5 +/- 5.5 and 16.7 +/- 6.5%En. Plasma glucose was the main source of CHO (52.9 +/- 9.5%En) with similar contributions from exogenous glucose (27.2 +/- 3.1%En), glucose from the liver (25.6 +/- 8.3%En) and muscle glycogen (20.9 +/- 4.0%En). Endogenous CHO contributed 46.6 +/- 3.9%En. Following the ski trek %En from protein, fat, CHO, exogenous glucose and endogenous CHO were not significantly modified (10.1 +/- 1.3, 15.8 +/- 6.7, 74.1 +/- 6.5, 28.7 +/- 3.0 and 45.5 +/- 7.5%En, respectively) but the %En from plasma glucose and glucose from the liver (41.1 +/- 3.6 and 12.4 +/- 4.0%En) were reduced, while that from muscle glycogen increased (33.0 +/- 4.5%En). These results show that in subjects in the fed state with glucose ingestion during exercise, CHO is the main substrate oxidized, with major contributions from both exogenous and endogenous CHO. Following a ~3-week period of prolonged low intensity exercise, the %En from protein, fat, CHO, exogenous glucose and endogenous CHO were not modified. However, the %En from glucose released from the liver was reduced (possibly due to an increased insulin sensitivity of the liver) while that from muscle glycogen was increased.

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of a 20-day ski trek on fuel selection during prolonged exercise at low workload with ingestion of 13C-glucose

Péronnet

Abdelaoui

Lavoie³

et al. 2009

Eur J Appl Physiol

View full text Add to dashboard Cite

show abstract

“…They also executed some biopsies from arm and leg muscle, and venous blood. They concluded that the exercise could improve the people's performance since an improved blood lipid profile and thus metabolic fitness appeared after prolonged low-intensity training and this occurred despite a decreased aerobic fitness and an unchanged arm and leg muscle hormone-sensitive lipase activity (Helge et al, 2008) Einspruch (1996) explained how challenge of providing rehabilitative services at relatively low price could help companies increase their productivities. They study also explains that if there is a link between the company' objectives and customer satisfaction, it is imperative to evaluate quality or customer satisfaction in the context of the patient's experience and described the quality function deployment system and how it could lead to a better understanding of the customer's needs and wants.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the effect of swimming programs on improving vocational relationships

Nazerian¹,

Iravani²,

Soltani³

2012

MSL

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Recreational activities play important role on workers' health conditions and improve people's creativity. Steel industry is one of industries, where workers mainly face with hard working conditions. There are various techniques to help human resources increase their potentials such as providing recreational centers, athletic facilities, etc. In this paper, we study the impact of regular swimming exercises on improving the efficiency of employees in management level in a steel complex unit called Mobarakeh Steel Complex. In this company, there were about 85 middle level managers and supervisors and the proposed study selects 30 people, randomly and divides them into two equal groups. In the first stage of the study, questionnaire of vocational relation are distributed among the participants of this study and some important factors, which could improve vocational relationships are measured. Next, the experimental groups are invited to take part in some selective aerobic programs for 8 weeks and 3 sessions per week and 1 hour and 15 minutes per session, regularly. Finally, we repeat the same experiments after the aerobic programs end and compare the results with the first one. The preliminary results indicate that the routine swimming programs have increased people self confidence, creativity and working group skills.

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“…They also executed some biopsies from arm and leg muscle, and venous blood. They concluded that the exercise could improve the people's performance since an improved blood lipid profile and thus metabolic fitness appeared after prolonged low-intensity training and this occurred despite a decreased aerobic fitness and an unchanged arm and leg muscle hormone-sensitive lipase activity (Helge et al, 2008) Einspruch (1996 explained how challenge of providing rehabilitative services at relatively low price could help companies increase their productivities. They study also explains that if there is a link between the company' objectives and customer satisfaction, it is imperative to evaluate quality or customer satisfaction in the context of the patient's experience and described the quality function deployment system and how it could lead to a better understanding of the customer's needs and wants.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the effect of selected aerobic programs on improving vocational relationships

Iravani¹,

Nazerian²,

Soltani

2011

msl

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The new millennium has commenced with an increase awareness of precious value of human resources. Many large firms have increased to use new human resources mobilization policies and the importance of human potential in business has developed, dramatically. There different methods to help human resources increase their potentials such as providing recreational centers, athletic facilities, etc. In this paper, we study the impact of providing exercise facilities on improving the efficiency of employees in management level in the biggest steel producers in Iran called Mobarakeh Steel Complex. In this company, there were about 85 middle level managers and supervisors and the proposed study selects 30 people, randomly and divides them into two equal groups. In the first stage of the study, questionnaire of vocational relation are distributed among the participants of our experiment and we measure some important factors, which could improve vocational relationships. Next, the experimental groups are invited to take part in some selective aerobic programs for 8 weeks and 3 sessions per week and 1 hour and 15 minutes per session, regularly. Finally, we repeat the same experiments after the aerobic programs end and compare the results with the first one. The preliminary results indicate that there is a meaningful difference between the healthcares of these two groups.

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Low‐intensity training dissociates metabolic from aerobic fitness

Cited by 27 publications

References 40 publications

Effect of a 20-day ski trek on fuel selection during prolonged exercise at low workload with ingestion of 13C-glucose

Effect of a 20-day ski trek on fuel selection during prolonged exercise at low workload with ingestion of 13C-glucose

Investigation of the effect of swimming programs on improving vocational relationships

Investigation of the effect of selected aerobic programs on improving vocational relationships

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