| 1. |
- Andersson, Eva A, 1958-, et al.
(författare)
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Maximal Aerobic Power versus Performance in Two Aerobic Endurance Tests among Young and Old Adults
- 2011
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Ingår i: Gerontology. - 0304-324X. ; :Aug, s. 1-11
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Tidskriftsartikel (refereegranskat)abstract
- Background: Aerobic fitness is of great value for reducing risk of mortality and cardiovascular diseases. Objective: This study evaluated the performance in and correlations between a new test (five-minute pyramid test, 5MPT), the six-minute walk-test (6MWT) and maximal oxygen uptake (VO(2max)) among old and young adults. Methods: Forty-four habitually active adults (females and males), 23 old (64-79 years) and 21 young (20-32 years) participated. In the 5MPT, the participants moved back and forth along a short walkway (5.5 m) over boxes (height: 'old people' 0.42 m, 'young people' 0.62 m) arranged like an elongated step pyramid for 5 min. Power in the pyramid test (5MPT(power)) was calculated as the product of numbers of laps, body weight, gravity and highest box level divided by time. A 6MWT and a maximal cycle ergometer test for direct measurements of VO(2max) were also performed. In all tests heart rate, with on-line electrocardiography, and perceived exertion were recorded. Results: There was a strong correlation between the 5MPT(power) and VO(2max) for the entire group studied (r = 0.98), and each of the four subgroups old and young females and males separately (r = 0.78-0.98). Contrary to several earlier studies, especially involving people with various diseases, the present data showed that 6MWT cannot be used to predict VO(2max) among old females and young adults. The correlation with VO(2max) was weaker for the 6MWT than for the 5MPT(power). The relative performance values for the old compared to the young (ratio old/young × 100) were considerably lower in 5MPT(power) and VO(2max) (47-55%) than in distance and 'work' in the 6MWT (82-86%). Conclusions: The results, with age and gender variations, can be valuable information in health-fitness contexts, since measuring physical aerobic capacity is very significant in connection with risk evaluations of mortality and various diseases. The 5MPT is a rapid, functional, easy and inexpensive tool for predicting assessed maximal aerobic power.
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| 2. |
- Andersson, Eva A., et al.
(författare)
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Physical activity for persons with obesity—a health project reported
- 2008
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Ingår i: Forum on Public Policy Online. - Oxford Round Table. - 1938-9809. ; 4:Spring
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Tidskriftsartikel (refereegranskat)abstract
- In public health contexts, increased physical activity habits and fitness (aerobic and strength capacities) are positively related for promoting health and preventing and treating common diseases/problems, including obesity and overweight. A strongly graded inverse association between physical activity and obesity has been shown both for adults and children. However, a lower mortality risk has been shown for those with greater weight but good aerobic capacity than for those of recommended weight but less fit. On the basis of a health project with physical activity for persons with or without obesity, the paper discusses evidence-based methods for promoting physical activity. General guidelines for the amount of physical activity for persons are described, as are the numerous physiological and medical advantages of physical activity. The economic benefits are also illustrated. The paper exemplifies methods of measuring physical activity habits and physical fitness. These two factors must be observed when showing improvements in public-health contexts, including groups with obesity.
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| 3. |
- Andersson, Helena M., et al.
(författare)
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Neuromuscular fatigue and recovery in elite female soccer
- 2008
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Ingår i: Medicine & Science in Sports & Exercise. - 0195-9131. ; 40:2, s. 372-380
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Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: To investigate the time course of recovery from neuromuscular fatigue and some biochemical changes between two female soccer matches separated by an active or passive recovery regime. METHODS: Countermovement jump (CMJ), sprint performance, maximal isokinetic knee flexion and extension, creatine kinase (CK), urea, uric acid, and perceived muscle soreness were measured in 17 elite female soccer players before, immediately after, 5, 21, 45, 51, and 69 h after a first match, and immediately after a second match. Eight players performed active recovery (submaximal cycling at 60% of HRpeak and low-intensity resistance training at < 50% 1RM) 22 and 46 h after the first match. RESULTS: In response to the first match, a significant decrease in sprint performance (-3.0 +/- 0.5%), CMJ (-4.4 +/- 0.8%), peak torque in knee extension (-7.1 +/- 1.9%) and flexion (-9.4 +/- 1.8%), and an increase in CK (+ 152 +/- 28%), urea (15 +/- 2), uric acid (+ 11 +/- 2%), and muscle soreness occurred. Sprint ability was first to return to baseline (5 h) followed by urea and uric acid (21 h), isokinetic knee extension (27 h) and flexion (51 h), CK, and muscle soreness (69 h), whereas CMJ was still reduced at the beginning of the second match. There were no significant differences in the recovery pattern between the active and passive recovery groups. The magnitude of the neuromuscular and biochemical changes after the second match was similar to that observed after the first match. CONCLUSION: The present study reveals differences in the recovery pattern of the various neuromuscular and biochemical parameters in response to a female soccer match. The active recovery had no effects on the recovery pattern of the four neuromuscular and three biochemical parameters.
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| 4. |
- Backman, Erik, et al.
(författare)
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Outdoor adventure
- 2012
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Ingår i: Outdoor recreation in change : current knowledge and future challenges : proceedings. ; s. 370-371
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Konferensbidrag (refereegranskat)abstract
- In recent decades there has been an increasing dynamic interplay in the “borderlands” of sport between closely related phenomena like outdoor recreation and nature tourism (see e.g. Bale 2006, Fredman et al. 2008a and Wheaton 2007). Two trends within these “borderlands” are explored in this study: the sportification of traditional outdoor activities and the liberation of outdoor activities from the landscapes in which they were originally performed. From a perspective of modernization, the following questions are addressed: 1. What is the state of knowledge regarding trends within outdoor adventure- and lifestyle sports?2. How are examples of activities, places and perspectives within outdoor adventure- and lifestyle sports expressed? To answer these questions, conventional literature studies of, firstly, academic journals and, secondly; magazines, photographs and commercials, have been conducted. The result shows that tendencies towards the sportification of outdoor adventure- and lifestyle sports (see e.g. Breivik 2010 and Wheaton 2004) and the liberation of these activities from their “original” landscape (see e.g. Daniel 2007 and Bottenburg & Salome 2010) are significant. Of importance from a practitioner perspective is that a “grey-zone” containing several new activities and dynamics is being established in the “borderlands” between sport and outdoor recreation (Sandell, Arnegård & Backman 2011). From an academic perspective, the identified intersection between the climate debate and the nature-related activities that can now be performed indoors is important (see e.g. Sandell 2011 and Sandell & Öhman 2010). Another result that indicates a need for further research is that issues of accessibility, especially for young people, should be considered in relation to the increasing certification and specialization that characterizes the development of outdoor activities (see e.g. Bäckström 2011, Fredman et al. 2008b, Lundvall 2011 and Odden 2008). The current renegotiation of ideals, activities, places and environments related to the traditions of outdoor recreation and sport is discussed, most notably regarding: a) Constructions and environments for activities previously performed in “natural” landscapes.b) Accessibility to outdoor adventure- and lifestyle sports for young people.c) The health aspect of traditional and sportified outdoor activities.d) Inclusion and exclusion in relation to outdoor adventure- and lifestyle sports.e) Physical planning and sustainable development in relation to outdoor adventure- and lifestyle sports.
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| 5. |
- Carlson, Rolf
(författare)
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The Development to Success in Swedish Biathlon
- 2010
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Ingår i: Baltic Sport Society Journal. - Riga, Lettland : Latvian Academy of Sport Education. ; 1:1
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Tidskriftsartikel (refereegranskat)abstract
- The purpose of the study was to contribute to an explanation why Swedes of both sexes achieved great international success simultaniously in a small national sport such as biathlon. The elite group consisted of the male and female national team. A control group matched in pairs was identified in variables age, sex and athletic performance. All investigated athletes were products of the swedish Sport Academy System (RIG, upper secondary education). Data were collected via interviews with athletes, coaches and managers. Compared to the controls, elite athletes were more often born during the first quadrupal of the year, less injured and less sick during RIG years and experienced coaches more favourable in terms of acting and individualisation.
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| 6. |
- Fernström, Maria, et al.
(författare)
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Effects of acute and chronic endurance exercise on mitochondrial uncoupling in human skeletal muscle.
- 2004
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Ingår i: Journal of Physiology. - 0022-3751. ; 554, s. 755-763
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Tidskriftsartikel (refereegranskat)abstract
- Mitochondrial proteins such as uncoupling protein 3 (UCP3) and adenine nucleotide translocase (ANT) may mediate back-leakage of protons and serve as uncouplers of oxidative phosphorylation. We hypothesized that UCP3 and ANT increase after prolonged exercise and/or endurance training, resulting in increased uncoupled respiration (UCR). Subjects were investigated with muscle biopsies before and after acute exercise (75 min of cycling at 70% of .VO2peak) or 6 weeks endurance training. Mitochondria were isolated and respiration measured in the absence (UCR or state 4) and presence of ADP (coupled respiration or state 3). Protein expression of UCP3 and ANT was measured with Western blotting. After endurance training, .VO2peak, citrate synthase activity (CS), state 3 respiration and ANT increased by 24, 47, 40 and 95%, respectively (all P < 0.05), whereas UCP3 remained unchanged. When expressed per unit of CS (a marker of mitochondrial volume) UCP3 and UCR decreased by 54% and 18%(P < 0.05). CS increased by 43% after acute exercise and remained elevated after 3 h of recovery (P < 0.05), whereas the other muscle parameters remained unchanged. An intriguing finding was that acute exercise reversibly enhanced the capacity of mitochondria to accumulate Ca2+(P < 0.05) before opening of permeability transition pores. In conclusion, UCP3 protein and UCR decrease after endurance training when related to mitochondrial volume. These changes may prevent excessive basal thermogenesis. Acute exercise enhances mitochondrial resistance to Ca2+ overload but does not influence UCR or protein expression of UCP3 and ANT. The increased Ca2+ resistance may prevent mitochondrial degradation and the mechanism needs to be further explored.
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| 7. |
- Fernström, Maria, et al.
(författare)
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Reduced efficiency, but increased fat oxidation, in mitochondria from human skeletal muscle after 24-h ultraendurance exercise.
- 2007
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Ingår i: Journal of applied physiology. - 8750-7587. ; 102:5, s. 1844-1849
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Tidskriftsartikel (refereegranskat)abstract
- The hypothesis that ultraendurance exercise influences muscle mitochondrial function has been investigated. Athletes in ultraendurance performance performed running, kayaking, and cycling at 60% of their peak O(2) consumption for 24 h. Muscle biopsies were taken preexercise (Pre-Ex), postexercise (Post-Ex), and after 28 h of recovery (Rec). Respiration was analyzed in isolated mitochondria during state 3 (coupled to ATP synthesis) and state 4 (noncoupled respiration), with fatty acids alone [palmitoyl carnitine (PC)] or together with pyruvate (Pyr). Electron transport chain activity was measured with NADH in permeabilized mitochondria. State 3 respiration with PC increased Post-Ex by 39 and 41% (P < 0.05) when related to mitochondrial protein and to electron transport chain activity, respectively. State 3 respiration with Pyr was not changed (P > 0.05). State 4 respiration with PC increased Post-Ex but was lower than Pre-Ex at Rec (P < 0.05 vs. Pre-Ex). Mitochondrial efficiency [amount of added ADP divided by oxygen consumed during state 3 (P/O ratio)] decreased Post-Ex by 9 and 6% (P < 0.05) with PC and PC + Pyr, respectively. P/O ratio remained reduced at Rec. Muscle uncoupling protein 3, measured with Western blotting, was not changed Post-Ex but tended to decrease at Rec (P = 0.07 vs. Pre-Ex). In conclusion, extreme endurance exercise decreases mitochondrial efficiency. This will increase oxygen demand and may partly explain the observed elevation in whole body oxygen consumption during standardized exercise (+13%). The increased mitochondrial capacity for PC oxidation indicates plasticity in substrate oxidation at the mitochondrial level, which may be of advantage during prolonged exercise.
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| 8. |
- Kullberg, Kerstin, et al.
(författare)
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'I start my day by thinking about what we're going to have for dinner'
- 2011
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Ingår i: Scandinavian Journal of Caring Sciences. - 0283-9318. ; 25:2, s. 227-234
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Tidskriftsartikel (refereegranskat)abstract
- The aim of the present study was to address the question of how older men with somatic diseases living in ordinary housing approach the question of food-related activities. Further, any food-related activity adaptations consequent to effects of diseases and of alterred life circumstances were explored. Interviews were conducted with a purposeful sample of 18 co-living and singel-living men, 64-84 years old. They were diagnosed with Parkinson's disease, rhematoid arthritis, or stroke. In the analysis a thematic framework was used. The findings revealed three food-related approaches, namely 'Cooking as a pleasure', describing joy in cooking; 'Cooking as a need', indicating no habit or skills in cooking; and ' Food is served', that is being served meals by a partner. It was found that gender-related roles in particular, but also changed life circumstances, activity limitations, personal interests, and a wish to maintain continuity and independence, affected the men's approaches to these activities. This knowledge may be useful in attempts to facilitate and support food-related activities among elderly men with diseases. Health-care efforts in promoting food-related activities should preferably be individualised in respect to older men's approach to these activities.
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| 9. |
- Larsen, Filip, et al.
(författare)
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Effects of dietary nitrate on blood pressure in healthy volunteers
- 2006
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Ingår i: New England Journal of Medicine. - 0028-4793. ; 28:355(26), s. 2792-3
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Tidskriftsartikel (refereegranskat)abstract
- To the Editor:Nitric oxide, generated by nitric oxide synthase, is a key regulator of vascular integrity. This system is dysfunctional in many cardiovascular disorders, including hypertension. A fundamentally different pathway for the generation of nitric oxide was recently described in which the anions nitrate (NO3 ) and nitrite (NO2 ) are converted into nitric oxide and other bioactive nitrogen oxides.1-3 Nitrate is abundant in our diet, and particularly high levels are found in many vegetables.3We examined the effect of 3-day dietary supplementation with either sodium nitrate (at a dose of 0.1 mmol per kilogram of body weight per day) or placebo (sodium chloride, at a dose of 0.1 mmol per kilogram per day) on blood pressure in 17 physically active, healthy volunteers, none of whom smoked (15 men and 2 women; mean age, 24 years). The study had a randomized, double-blind, crossover design with two different treatment periods during which the subjects received either nitrate or placebo; the treatment periods were separated by a washout period of at least 10 days. The compounds were dissolved in water and could not be distinguished by taste or appearance. During the two treatment periods, the subjects were instructed to avoid all foods with a moderate or high nitrate content.3Systolic blood pressure Effects of 3-Day Dietary Supplementation with Inorganic Nitrate or Placebo on Systolic (Panel A) and Diastolic (Panel B) Blood Pressure in 17 Healthy Volunteers.) and pulse rate did not change significantly after nitrate supplementation, as compared with placebo supplementation. However, the diastolic blood pressure was on average 3.7 mm Hg lower after nitrate supplementation than after placebo supplementation (P<0.02) (Figure 1B), and the mean arterial pressure was 3.2 mm Hg lower (P<0.03). Plasma nitrate levels were higher after nitrate ingestion than after placebo ingestion (mean [±SD], 178±51 and 26±11 μM, respectively; P<0.001), as were plasma nitrite levels (219±105 and 138±38 nM, respectively; P<0.01).The daily nitrate dose used in the study corresponds to the amount normally found in 150 to 250 g of a nitrate-rich vegetable such as spinach, beetroot, or lettuce. It is clear from earlier studies, such as the Dietary Approaches to Stop Hypertension (DASH) trial, that a diet rich in fruits and vegetables can reduce blood pressure,4,5 but attempts to modify single nutrients have been inconsistent. Therefore, it has been argued that the effect of any individual nutrient is too small to detect in trials. In our study, reduced blood pressure was associated with nitrate supplementation alone; this effect was evident in young normotensive subjects. In fact, it was similar to that seen in the healthy control group in the DASH study.4 The exact mechanism behind the blood-pressure–lowering effect of nitrate needs to be clarified in future studies.We conclude that short-term dietary supplementation with inorganic nitrate reduces diastolic blood pressure in healthy young volunteers.
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| 10. |
- Lundqvist, Carolina, et al.
(författare)
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Positive emotions are not simply the absence of the negative ones:
- 2010
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Ingår i: The Sport psychologist. - 0888-4781. ; 24, s. 468-488
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Tidskriftsartikel (refereegranskat)abstract
- The purpose of this study was to psychometrically evaluate the Emotional Recovery Questionnaire (EmRecQ) and to describe athletes’ individual response patterns in five repeated assessments using the EmRecQ. Three samples were used. Samples 1 and 2 consisted of 192 and 379 (Mean age 16.4 years, SD = 0.7 and Mean age: 17.0 years, SD = 1.1) elite athletes from different sports. The third sample consisted of 20 (Mean age: 21.3, SD = 19.0) female elite basketball players. The EmRecQ is a 22-item questionnaire that assesses Happiness, Security, Harmony, Love, and Vitality. Results showed acceptable weighted omega reliability and construct reliability. Confirmatory factor analyses supported the a priori specified five-factor correlated model. Case profiles of repeated assessments revealed individual response patterns of the separate EmRecQ subscales that corresponded well with rated training load and total quality of recovery. The findings provide support for the EmRecQ’s psychometric properties and applied usefulness.
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