To describe different end criteria for reaching maximal oxygen uptake (VO2max) during a continuous graded exercise test on the treadmill, and to explore the manner by which different end criteria ...have an impact on the magnitude of the VO2max result.
A sample of 861 individuals (390 women) aged 20-85 years performed an exercise test on a treadmill until exhaustion. Gas exchange, heart rate, blood lactate concentration and Borg Scale6-20 rating were measured, and the impact of different end criteria on VO2max was studied;VO2 leveling off, maximal heart rate (HRmax), different levels of respiratory exchange ratio (RER), and postexercise blood lactate concentration.
Eight hundred and four healthy participants (93%) fulfilled the exercise test until voluntary exhaustion. There were no sex-related differences in HRmax, RER, or Borg Scale rating, whereas blood lactate concentration was 18% lower in women (P<0.001). Forty-two percent of the participants achieved a plateau in VO2; these individuals had 5% higher ventilation (P = 0.033), 4% higher RER (P<0.001), and 5% higher blood lactate concentration (P = 0.047) compared with participants who did not reach a VO2 plateau. When using RER ≥1.15 or blood lactate concentration ≥8.0 mmol•L(-1), VO2max was 4% (P = 0.012) and 10% greater (P<0.001), respectively. A blood lactate concentration ≥8.0 mmol•L(-1) excluded 63% of the participants in the 50-85-year-old cohort.
A range of typical end criteria are presented in a random sample of subjects aged 20-85 years. The choice of end criteria will have an impact on the number of the participants as well as the VO2max outcome. Suggestions for new recommendations are given.
Reliable suicide statistics are a prerequisite for suicide monitoring and prevention. The aim of this study was to assess the reliability of suicide statistics through a systematic review of the ...international literature.
We searched for relevant publications in EMBASE, Ovid Medline, PubMed, PsycINFO and the Cochrane Library up to October 2010. In addition, we screened related studies and reference lists of identified studies. We included studies published in English, German, French, Spanish, Norwegian, Swedish and Danish that assessed the reliability of suicide statistics. We excluded case reports, editorials, letters, comments, abstracts and statistical analyses. All three authors independently screened the abstracts, and then the relevant full-text articles. Disagreements were resolved through consensus.
The primary search yielded 127 potential studies, of which 31 studies met the inclusion criteria and were included in the final review. The included studies were published between 1963 and 2009. Twenty were from Europe, seven from North America, two from Asia and two from Oceania. The manner of death had been re-evaluated in 23 studies (40-3,993 cases), and there were six registry studies (195-17,412 cases) and two combined registry and re-evaluation studies. The study conclusions varied, from findings of fairly reliable to poor suicide statistics. Thirteen studies reported fairly reliable suicide statistics or under-reporting of 0-10%. Of the 31 studies during the 46-year period, 52% found more than 10% under-reporting, and 39% found more than 30% under-reporting or poor suicide statistics. Eleven studies reassessed a nationwide representative sample, although these samples were limited to suicide within subgroups. Only two studies compared data from two countries.
The main finding was that there is a lack of systematic assessment of the reliability of suicide statistics. Few studies have been done, and few countries have been covered. The findings support the general under-reporting of suicide. In particular, nationwide studies and comparisons between countries are lacking.
ObjectivesSeveral studies have shown increased suicide rates among veterinarians. We investigated the self-reported prevalence of suicidal thoughts and behaviours and contributing and independent ...factors associated with suicidal thoughts and behaviours among veterinarians in Norway.DesignCross-sectional, nationwide survey.Participants2596 veterinarians in Norway (response rate: 75%).Main outcome measurePaykel’s five-item questionnaire.ResultsIn total, 27% (n=682/2567) of veterinarians in Norway felt that life was not worth living during the last year, 5% (n=139/2562) had serious suicidal thoughts, and 0.2% (n=6/2537) had attempted suicide. Female veterinarians reported significantly higher prevalence of suicidal feelings and thoughts than males. For serious suicidal thoughts, women had nearly twice the prevalence as their male colleagues (6.2% (n=108/1754) vs 3.6% (n=28/766), χ2: 6.5, p=0.011). Independent factors associated with serious suicidal thoughts were being single (OR 1.76, 95% CI 1.13 to 2.72, p<0.05), negative life events (OR=1.43, 95% CI 1.22 to 1.68, p<0.001) and the presence of mental distress (OR 2.75, 95% CI 2.14 to 3.52, p<0.001). The veterinarians related their serious suicidal thoughts to work and personal problems, and a lesser degree to family, social and other problems. Nearly twice as many women (53%, n=57/108) as men (28%, n=7/25) reported work problems as the most important contributing factor to their serious suicidal thoughts (χ2: 4.99, p=0.03). 4% (n=6/139) reported work problems as the only factor of importance.ConclusionsVeterinarians in Norway have relatively high prevalence of suicidal feelings and thoughts, including serious suicidal thoughts. In multivariable analyses, the individual factors were more important than work-related ones, while work problems were the most reported contributing factor to serious suicidal thoughts by the veterinarians themselves. The role of gender and specific work-related factors should be further investigated to better understand the complexity of suicidal behaviour among veterinarians.
To describe training variations across the annual cycle in Olympic and World Champion endurance athletes, and determine whether these athletes used tapering strategies in line with recommendations in ...the literature.
Eleven elite XC skiers and biathletes (4 male; 28±1 yr, 85±5 mL x min(-1) x kg(-1) VO2max, 7 female, 25±4 yr, 73±3 mL x min(-1) x kg(-1) VO2max) reported one year of day-to-day training leading up to the most successful competition of their career. Training data were divided into periodization and peaking phases and distributed into training forms, intensity zones and endurance activity forms.
Athletes trained ∼800 h/500 sessions x year(-1), including ∼500 h x year(-1) of sport-specific training. Ninety-four percent of all training was executed as aerobic endurance training. Of this, ∼90% was low intensity training (LIT, below the first lactate threshold) and 10% high intensity training (HIT, above the first lactate threshold) by time. Categorically, 23% of training sessions were characterized as HIT with primary portions executed at or above the first lactate turn point. Training volume and specificity distribution conformed to a traditional periodization model, but absolute volume of HIT remained stable across phases. However, HIT training patterns tended to become more polarized in the competition phase. Training volume, frequency and intensity remained unchanged from pre-peaking to peaking period, but there was a 32±15% (P<.01) volume reduction from the preparation period to peaking phase.
The annual training data for these Olympic and World champion XC skiers and biathletes conforms to previously reported training patterns of elite endurance athletes. During the competition phase, training became more sport-specific, with 92% performed as XC skiing. However, they did not follow suggested tapering practice derived from short-term experimental studies. Only three out of 11 athletes took a rest day during the final 5 days prior to their most successful competition.
Abstract
Background
Veterinarians have a relatively high prevalence of mental health problems; however, research on professional help-seeking is limited. The main purpose of the present study was to ...investigate the prevalence of mental health problems and professional help-seeking behaviour for such problems, and the independent factors associated with help-seeking behaviour among veterinarians in Norway.
Method
This cross-sectional study included all veterinarians in Norway (response rate 75%, 70% women). Logistic regression was used to calculate odds ratios (OR) for professional help-seeking for mental health problems. Analyses were controlled for socio-demographic, individual (personality trait reality weakness, SCL-5, attitudes toward mental illness), and work-related factors (work field, job stress).
Results
The prevalence of self-reported mental health problems in need of treatment was 30% (746/2494), significantly higher among women than men (36% vs. 15%). Fifty-four percent had sought professional help, women significantly more often (56%) than men (41%). Among veterinarians with serious suicidal thoughts, 50% (69/139) had sought help. Veterinarians most frequently related mental health problems to work problems (47%), women significantly more often (49%) than men (34%). Factors significantly associated with help-seeking were being female, OR = 2.11 (95% CI: 1.24–3.60), working with production animals, OR = 0.35 (0.13–0.98), public administration, OR = 2.27 (1.15–4.45), academia/research, OR = 4.78 (1.99–11.47) or ‘other’ fields, OR = 2.79 (1.23–6.32), and attitudes toward mental illness, OR = 1.32 (1.03–1.68).
Conclusions
Thirty percent of veterinarians in Norway reported mental health problems in need of treatment, and only half of them had sought professional help. A low degree of help-seeking was also seen among those with serious suicidal thoughts. Being female, positive attitudes toward treatment of mental illness, working in public administration, academia/research and ‘other’ field were associated with more help-seeking, while working in production animal practice was associated with less help-seeking. Interventions to increase help-seeking behaviour for mental health problems among veterinarians are warranted.
Veterinarians are an occupational group with an increased suicide risk. Euthanasing animals may influence both veterinarians' views on assisted dying in humans and their suicide risk. We investigated ...(I) attitudes towards assisted dying, (II) whether the field of work and the frequency of euthanasing animals were associated with positive attitudes towards human euthanasia, and (III) whether frequently euthanasing animals was associated with serious suicidal thoughts.
We conducted a nationwide cross-sectional study among veterinarians in Norway (response rate: 75%). Logistic regression models were used to calculate the odds ratios for both positive attitudes towards human euthanasia and serious suicidal thoughts. The analyses were adjusted for socio-demographic and work-related factors.
Fifty-five percent of the veterinarians agreed that euthanasia should be permitted for humans with a fatal disease and short life expectancy. Working with companion animals was independently associated with positive attitudes towards human euthanasia (OR = 1.66 (95% CI: 1.23-2.23)), while veterinarians' frequency of euthanasing animals was not. Frequency of euthanasing animals was independently associated with serious suicidal thoughts, OR = 2.56 (95% CI: 1.35-4.87).
Veterinarians' attitudes towards assisted dying in humans did not differ from those of the general population. Veterinarians' frequency of euthanasing animals was not associated with positive attitudes towards euthanasia in humans. However, veterinarians working in companion animal practices were more likely to have positive attitudes towards euthanasia in humans. Moreover, euthanising animals five times or more a week was associated with serious suicidal thoughts. We need more research to infer about causality in these findings.
Researchers have become increasingly aware that ambulance personnel may be at risk of developing work-related health problems. This article systematically explores the literature on health problems ...and work-related and individual health predictors in the ambulance services.
We identified the relevant empirical literature by searching several electronic databases including Medline, EMBASE, PsychINFO, CINAHL, and ISI Web of Science. Other relevant sources were identified through reference lists and other relevant studies known by the research group.
Forty-nine studies are included in this review. Our analysis shows that ambulance workers have a higher standardized mortality rate, higher level of fatal accidents, higher level of accident injuries and a higher standardized early retirement on medical grounds than the general working population and workers in other health occupations. Ambulance workers also seem to have more musculoskeletal problems than the general population. These conclusions are preliminary at present because each is based on a single study. More studies have addressed mental health problems. The prevalence of post-traumatic stress symptom caseness was > 20% in five of seven studies, and similarly high prevalence rates were reported for anxiety and general psychopathology in four of five studies. However, it is unclear whether ambulance personnel suffer from more mental health problems than the general working population.
Several indicators suggest that workers in the ambulance services experience more health problems than the general working population and workers in other health occupations. Several methodological challenges, such as small sample sizes, non-representative samples, and lack of comparisons with normative data limit the interpretation of many studies. More coordinated research and replication are needed to compare data across studies. We discuss some strategies for future research.
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