Espen Svendsen Gjevestad

• Berge, Jarle; Nunavath, Vimala; Asbjørnsen, Rikke Aune; Borgeraas, Heidi; Hertel, Jens Kristoffer & Linge, Anita Dyb [Vis alle 15 forfattere av denne artikkelen] (2025). Machine learning for estimating cardiorespiratory fitness in patients with obesity: protocol for a retrospective and prospective multi - center cohort study (Preprint). JMIR Research Protocols. doi: 10.2196/preprints.85069. Fulltekst i vitenarkiv Vis sammendrag

  BACKGROUND Cardiorespiratory fitness (VO2max) is a key predictor of cardiovascular and other health-related diseases and is often impaired in individuals with obesity due to functional and structural limitations. Improving cardiorespiratory fitness enhances overall health and reduces mortality, making it an important indicator for preventing and treating obesity. OBJECTIVE The primary aim of this study is to develop an obesity-specific machine learning (ML) model that can accurately estimate VO2max, a key indicator of cardiovascular fitness, and make it accessible through a web-based application. METHODS A ML model will be trained to estimate VO2max in individuals with obesity using retrospective data combining assessments of VO2max tests and clinical parameters from adult patients with severe obesity body mass index (BMI ≥40.0 kg/m2, or 35.0-39.9 kg/m2 with at least one obesity-related comorbidity) from Vestfold Hospital Trust, Muritunet Rehabilitation Institution and Norwegian School of Sport Sciences. The ML-based VO2max estimation model will be presented as a web application, allowing easy access and interaction. The model’s estimations will be compared against direct VO2max measurements obtained from medical equipment across institutions as part of a prospective validation. Ethical approval has been obtained for the use of two databases in the initial model development; approval for the remaining data and prospective phase is pending. RESULTS Vestfold Hospital Trust, the Norwegian School of Sport Medicine, and Muritunet Rehabilitation have from 2013 to 2025 conducted > 2623 VO2max test and clinical parameters from 1,279 adults with severe obesity, both before, during and after lifestyle interventions. This comprehensive data set serves as the foundation for developing the ML model, which is presented through a user-friendly web application. A web application has been developed and will be tested with patients and healthcare personnel. The first scientific publication of the ML model is expected to be published in 2026. The results of the overall project are expected to be completed in 2028. CONCLUSIONS This project aims to develop a machine learning model, which serves as a cost-effective tool for VO2max estimation in individuals with obesity, improving accessibility to this important health marker. This is the first known attempt in Norway to estimate VO2max in an obese population using machine learning, based on a unique clinical database. The project holds significant societal value with potential national and international relevance for healthcare and patient outcomes. CLINICALTRIAL ClinicalTrials.gov (Identifier: NCT07011108)

• Bratland-Sanda, Solfrid; Støa, Eva Maria; Sanda, Åsmund; Reinboth, Michael Sæther & Gjevestad, Espen Svendsen (2023). Fit for beredskap? En litteraturstudie om helse og livsstil blant innsatsledere i politiet. I Dille, Therese; Kristiansen, Elsa & Boe, Ole (Red.), Eventer i en beredskapskontekst. Universitetsforlaget. ISSN 9788215054636. s. 136–159. doi: 10.18261/9788215054599-23-09. Fulltekst i vitenarkiv Vis sammendrag

  Politiets innsatsledere er en mannsdominert ansattgruppe utsatt for mange stressfaktorer som kan påvirke både helse og sikkerhet i yrkesrollen. Dette kapitlet fokuserer på hvordan innsatsledernes helse og livsstil er av betydning for beredskap og tjenesteutførelse i daglig beredskap og i beredskap på planlagte eventer. Vår kunnskapsoppsummering identifiserer behov for empiri og for at tjenestepersoner og forskere sammen fremskaffer kunnskap på feltet.

• Berk, Kirsten A.; Borgeraas, Heidi; Narverud, Ingunn; Mulder, Monique T.; Øyri, Linn Kristin Lie & Verhoeven, Adrie J M [Vis alle 14 forfattere av denne artikkelen] (2022). Differential effects of bariatric surgery and lifestyle interventions on plasma levels of Lp(a) and fatty acids. Lipids in Health and Disease. 21(145), s. 1–14. doi: 10.1186/s12944-022-01756-1. Fulltekst i vitenarkiv Vis sammendrag

  Limited evidence suggests that surgical and non-surgical obesity treatment differentially influence plasma Lipoprotein (a) [Lp(a)] levels. Further, a novel association between plasma arachidonic acid and Lp(a) has recently been shown, suggesting that fatty acids are a possible target to influence Lp(a). Here, the effects of bariatric surgery and lifestyle interventions on plasma levels of Lp(a) were compared, and it was examined whether the effects were mediated by changes in plasma fatty acid (FA) levels. Methods The study includes two independent trials of patients with overweight or obesity. Trial 1: Two-armed intervention study including 82 patients who underwent a 7-week low energy diet (LED), followed by Roux-en-Y gastric bypass and 52-week follow-up (surgery-group), and 77 patients who underwent a 59-week energy restricted diet- and exercise-program (lifestyle-group). Trial 2: A clinical study including 134 patients who underwent a 20-week very-LED/LED (lifestyle-cohort). Results In the surgery-group, Lp(a) levels [median (interquartile range)] tended to increase in the pre-surgical LED-phase [17(7–68)-21(7–81)nmol/L, P = 0.05], but decreased by 48% after surgery [21(7–81)—11(7–56)nmol/L, P < 0.001]. In the lifestyle-group and lifestyle-cohort, Lp(a) increased by 36%[14(7–77)—19(7–94)nmol/L, P < 0.001] and 14%[50(14–160)—57(19–208)nmol/L, P < 0.001], respectively. Changes in Lp(a) were independent of weight loss. Plasma levels of total saturated FAs remained unchanged after surgery, but decreased after lifestyle interventions. Arachidonic acid and total n-3 FAs decreased after surgery, but increased after lifestyle interventions. Plasma FAs did not mediate the effects on Lp(a). Conclusion Bariatric surgery reduced, whereas lifestyle interventions increased plasma Lp(a), independent of weight loss. The interventions differentially influenced changes in plasma FAs, but these changes did not mediate changes in Lp(a).

• Berge, Jarle; Hjelmesæth, Jøran Sture; Kolotkin, Ronette Loganzo; Støren, Øyvind; Bratland-Sanda, Solfrid & Hertel, Jens Kristoffer [Vis alle 10 forfattere av denne artikkelen] (2022). Effect of aerobic exercise intensity on health-related quality of life in severe obesity: a randomized controlled trial. Health and Quality of Life Outcomes. 20. doi: 10.1186/s12955-022-01940-y. Fulltekst i vitenarkiv Vis sammendrag

  Background Aerobic exercise is an important part of obesity treatment and may improve health-related quality of life (HRQOL). The objective of this study was to compare the effect of two different exercise programs on health-related quality of life in patients with severe obesity. Methods This was a single-center, open-label, randomized, parallel-group study comparing the effects of a 24-week moderate-intensity continuous training (MICT) program and a combined high-intensity interval training program with MICT (HIIT/MICT). The primary objective (specified secondary outcome) was to assess HRQOL by using the general health dimension of the Short Form Health Survey (SF-36). The secondary objectives were to assess other dimensional SF-36 scores, the impact of weight on the physical and psychosocial aspects of quality of life (IWQOL-Lite), and the burden of obesity-specific weight symptoms (WRSM). Results 73 patients were enrolled and reported patient reported outcome measures, with 71 patients (55% females) allocated to either MICT (n = 34) or HIIT/MICT (n = 37). In the intention-to-treat analysis, general health scores increased between baseline and 24-week follow-up in both the HIIT/MICT group and the MICT group, with a mean change of 13 (95% CI 6–21) points and 11 (95% CI 5–17) points, respectively, with no difference between the groups. The effect sizes of these changes were moderate. The vitality and social functioning scores of SF-36, and the physical function and self-esteem scores of IWQOL-Lite increased moderately in both groups, with no difference between groups. The tiredness, back pain, and physical stamina scores based on WRSM showed moderate to strong changes in both the groups. Conclusions Patients who had completed a combined HIIT/MICT program did not experience larger improvements in general health compared with those completing a clean 24-week MICT program. Exercise may confer general health benefits independent of intensity.

• Berge, Jarle; Hjelmesæth, Jøran; Hertel, Jens Kristoffer; Gjevestad, Espen Svendsen; Småstuen, Milada Cvancarova & Johnson, Line Kristin [Vis alle 10 forfattere av denne artikkelen] (2021). Effect of Aerobic Exercise Intensity on Energy Expenditure and Weight Loss in Severe Obesity-A Randomized Controlled Trial. Obesity. ISSN 1930-7381. 29(2), s. 359–369. doi: 10.1002/oby.23078. Fulltekst i vitenarkiv Vis sammendrag

  Objective This study aimed to compare the effects of two aerobic exercise programs of different intensities on energy expenditure. Methods This was a single‐center randomized controlled trial of patients with severe obesity allocated to a 24‐week moderate‐intensity continuous training (MICT) program or a combined MICT with high‐intensity interval training (HIIT/MICT) program. The primary outcome was energy expenditure during exercise (EEDE). Secondary outcomes included resting metabolic rate, cardiorespiratory fitness, and body composition. Results A total of 82 (56% females) patients were screened, and 71 (55% females) patients were allocated to HIIT/MICT (n = 37) or MICT (n = 34). Per‐protocol analysis showed that EEDE increased by 10% (95% CI: 3%‐17%) in the HIIT/MICT group (n = 16) and 7.5% (95% CI: 4%‐10%) in the MICT group (n = 24), with no differences between groups. In the 8‐ to 16‐ week per‐protocol analysis, the HIIT/MICT group had a significantly larger increase in EEDE compared with the MICT group. Resting metabolic rate remained unchanged in both groups. HIIT/MICT and MICT were associated with significant weight loss of 5 kg and 2 kg, respectively. Conclusions Patients completing a 24‐week combined HIIT/MICT program did not achieve a higher EEDE compared with those who completed a 24‐week MICT program. The HIIT/MICT group experienced, on average, a 3‐kg‐larger weight loss than the MICT group.

• Aakre, Kristin Moberg; Omland, Torbjørn; Nordstrand, Njord; Gjevestad, Espen Svendsen; Holven, Kirsten Bjørklund & Lyngbakken, Magnus [Vis alle 7 forfattere av denne artikkelen] (2020). Gastric bypass surgery is associated with reduced subclinical myocardial injury and greater activation of the cardiac natriuretic peptide system than lifestyle intervention. Clinical Biochemistry. ISSN 0009-9120. 86, s. 36–44. doi: 10.1016/j.clinbiochem.2020.09.006. Fulltekst i vitenarkiv Vis sammendrag

  Aims Morbid obesity is a risk factor for cardiovascular disease. The relative effects of Roux-en-Y gastric bypass surgery (GBS) and intensive lifestyle intervention (ILI) on subclinical myocardial injury, the activity of the cardiac natriuretic system, and systemic inflammation remain unclear. Methods In a 59-week non-randomized clinical trial that included 131 patients with morbid obesity, we compared the effects of GBS and ILI on concentrations of cardiac troponin T (cTnT) and I (cTnI), N-terminal pro-B-type natriuretic peptide (NT-proBNP) and C-reactive protein (CRP). Results In the GBS and ILI group, median body mass index (BMI) was reduced by 14.4 kg/m2 versus 3.9 kg/m2, respectively (p value < 0.001). Cardiac troponins decreased after GBS, p = 0.014 (cTnT) and p = 0.065 (cTnI) and increased significantly in those treated with ILI (p values ≤ 0.021) (between-group differences for deltas: p ≤ 0.003). NT-proBNP increased in both groups, but significantly more in the GBS than in the ILI group (between-group differences for deltas: p = 0.008). CRP decreased significantly within the GBS and the ILI group, with this change significantly greater in the GBS group (between-group differences for deltas p < 0.001). The dominating mediator of the biomarker changes was weight loss. Prior coronary artery disease and diabetes were predictive of the magnitude of the changes in cTnI and NT-proBNP, respectively. Conclusion Compared to ILI, GBS was associated with reduced subclinical myocardial injury and systemic inflammation, and enhancement of the cardiac natriuretic peptide system. The biomarker changes were predominantly mediated by weight loss.

• Berge, Jarle; Støren, Øyvind; Hertel, Jens Kristoffer; Gjevestad, Espen Svendsen; Småstuen, Milada Cvancarova & Hjelmesæth, Jøran (2019). Associations between cardiorespiratory fitness and weight loss in patients with severe obesity undergoing an intensive lifestyle intervention program: retrospective cohort study. BMC Endocrine Disorders. 19(1), s. 1–9. doi: 10.1186/s12902-019-0394-z. Fulltekst i vitenarkiv Vis sammendrag

  Background To assess the association between cardiorespiratory fitness (CRF) and weight changes in treatment seeking patients with severe obesity who underwent a 1-year intensive lifestyle intervention (ILI) program. Methods Retrospective cohort study conducted at a tertiary care outpatient rehabilitation center from November 1, 2013 through January 1, 2017. CRF was measured as maximal oxygen consumption during a maximal oxygen uptake (VO2max) test on a treadmill or bicycle at baseline and after 3 months. Results A total of 180 patients had a baseline mean (SD) BMI 41.1 (4.8) kg/m2 and CRF of 79.4 (14.9) mL·kg-0.75·min− 1. Patients with a baseline CRF above median achieved a greater 3-month and 1-year weight loss compared with patients with CRF below median; mean (95% CI) 2.5 kg (1.3, 3.8) and 4.0 kg (0.8, 7.2), respectively. In addition, patients with 3-month changes of CRF above median had 4.0 kg (0.9, 7.1) greater weight loss at 1-year follow-up than those below median. Conclusions Among patients with severe obesity who underwent a 1-year ILI program, higher baseline CRF was associated with significantly larger weight loss after 3 months and 1 year. In addition, those with higher initial 3-month CRF changes had greater weight loss at 1 year.

• Sandvik, Asle Makoto; Gjevestad, Espen Svendsen; Aabrekk, Einar; Öman, Peter H.; Kjendlie, Per-Ludvik & Hystad, Sigurd William [Vis alle 9 forfattere av denne artikkelen] (2019). Physical fitness and psychological hardiness as predictors of parasympathetic control in response to stress: a Norwegian police simulator training study. Journal of Police and Criminal Psychology. ISSN 0882-0783. s. 1–14. doi: 10.1007/s11896-019-09323-8. Fulltekst i vitenarkiv Vis sammendrag

  The individual biopsychological response to a specific stressor is the result of a complex interplay between many different factors including physiology, behavior, and personality. The goal of the present study was to explore the potential link between physical fitness, hardiness (Kobasa 1979), and the individual autonomic stress arousal experienced during a stressful police training situation (active shooter). Eighty-four police students participated in the study and were randomly assigned to either a high-stress or a low-stress testing condition. Hardiness was measured with the Dispositional Resilience Scale (Hystad et al. 2010). Physical fitness was assessed with V˙O2max . Parasympathetic control was measured using heart rate variability (HRV), i.e., the root mean square successive difference (RMSSD). Regression analysis showed that psychological hardiness had a negative main effect on change in parasympathetic activity from baseline to the testing phase (B = − 1.43, t = − 2.81, p = 0.007). Larger withdrawal of parasympathetic activation for high-hardy individuals in this phase of the study can be interpreted as an adaptive adjustment to the task set in front of them. A second regression analysis showed that both psychological hardiness (B = − 1.47, t = 3.68, p < 0.001) and physical fitness (B = 0.89, t = 2.85, p = 0.006) had significant main effects on change of parasympathetic activity entering the recovery phase of the study. Both regression coefficients were positive, with higher scores on hardiness and physical fitness predicting greater parasympathetic activation at stress offset. Overall, the results suggest that psychological hardiness and physical fitness may be important factors in how operational stress affects the individual in a police setting. Those high in hardiness and good physical form seem to be better able to recuperate and reset after a stressful incident, something that can be vital in an operational context. These results will be discussed in relation to the existing literature in the field.

• Gjevestad, Espen Svendsen; Hjelmesæth, Jøran; Sandbu, Rune & Nordstrand, Njord (2015). Effects of intensive lifestyle intervention and gastric bypass on aortic stiffness: A 1-year nonrandomized clinical study. Obesity. ISSN 1930-7381. 23(1), s. 37–45. doi: 10.1002/oby.20880. Fulltekst i vitenarkiv
• Gjevestad, Espen Svendsen; Karlsen, Tor-Ivar; Røislien, Jo; Mæhlum, S. & Hjelmesæth, Jøran (2013). The effectiveness of secondary and tertiary care lifestyle intervention in morbidly obese patients: a 1-year non-randomized controlled pragmatic clinical trial. Clinical Obesity. ISSN 1758-8103. 3(1-2), s. 39–50. doi: 10.1111/cob.12011. Fulltekst i vitenarkiv
• Nordstrand, Njord; Gjevestad, Espen Svendsen; Hertel, Jens Kristoffer; Johnson, Line Kristin; Saltvedt, Erling & Røislien, Jo [Vis alle 7 forfattere av denne artikkelen] (2013). Arterial stiffness, lifestyle intervention and a low-calorie diet in morbidly obese patients – a nonrandomized clinical trial. Obesity. ISSN 1930-7381. 21(4), s. 690–697. doi: 10.1002/oby.20099. Fulltekst i vitenarkiv
• Nordstrand, Njord; Gjevestad, Espen Svendsen; Nguyen-Dinh, Khiem; Hofsø, Dag; Røislien, Jo & Saltvedt, Erling [Vis alle 8 forfattere av denne artikkelen] (2011). The relationship between various measures of obesity and arterial stiffness in morbidly obese patients. BMC Cardiovascular Disorders. 11. doi: 10.1186/1471-2261-11-7. Fulltekst i vitenarkiv Vis sammendrag

  Background Obesity is associated with increased risk of cardiovascular disease. Arterial stiffness assessed by carotid femoral pulse wave velocity (PWV) is an independent predictor of cardiovascular morbidity and mortality. We aimed to investigate how various measures of body composition affect arterial stiffness. Methods This is an analysis of cross-sectional baseline data from a controlled clinical trial addressing changes in arterial stiffness after either surgery or lifestyle intervention in a population of morbidly obese patients. High-fidelity applanation tonometry (Millar®, Sphygmocor®) was used to measure pulse wave velocity (PWV). Carotid femoral PWV is a direct measure of arterial stiffness and is considered to be the gold standard method. The Inbody 720 Body Composition Analyzer was used for bioelectrical impedance analysis (BIA). Spearman's correlation, independent samples t-test, chi-square tests, Fisher's exact test and multiple linear regression analyses were used as statistical methods. Results A total of 133 patients (79 women), with a mean (SD) age of 43 (11) years were included in the study. Men had a significantly higher prevalence of obesity related comorbidities and significantly higher PWV, 9.1 (2.0) m/s vs. 8.1 (1.8) m/s, p = 0.003, than women. In the female group, PWV was positively correlated with WC, WHtR, BMI and visceral fat area. In the male group, PWV was negatively correlated with BMI. Multiple linear regression analysis showed that increasing BMI, WC, WHtR, visceral fat area and fat mass were independently associated with higher PWV in women, but not in men, after adjustment for age, hypertension and type 2 diabetes. Conclusion Most measures of general and abdominal obesity were predictors of arterial stiffness in female morbidly obese patients. Trial registration ClinicalTrials.gov Identifier NCT00626964

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• Grindaker, Eirik; Gjevestad, Espen Svendsen; Valnes, Thomas Andre & Lognseth, Stig (2026). Fra opptak til beredskap – hvordan utvikler vi robuste operative politifolk? doi: https:/share.transistor.fm/s/70c64248. Fulltekst i vitenarkiv Vis sammendrag

  I denne episoden utforsker vi hvordan politiet utvikler og vedlikeholder fysisk kapasitet for å møte reelle operative krav. Vi diskuterer hva som skal til for å utvikle robust personell som tåler høy belastning over tid, hvordan trening, kultur, ledelse og organisatorisk tilrettelegging påvirker dette, samt balansen mellom individuelt ansvar og organisatorisk tilrettelegging når kapasitet skal utvikles og opprettholdes over tid. Vi belyser også hvordan samfunnstrekk som økt inaktivitet og stillesitting kan påvirke rekruttering, fysisk kapasitet og beredskap i operative virksomheter som politiet og Forsvaret.

• Grindaker, Eirik; Gjevestad, Espen Svendsen; Valnes, Thomas Andre & Lognseth, Stig (2026). Fysiske krav i politiet – hva krever jobben i praksis? doi: https:/share.transistor.fm/s/a8fe6a00. Fulltekst i vitenarkiv Vis sammendrag

  I denne episoden utforsker vi hvilke fysiske krav som stilles til operativt politiarbeid, og hva tilstrekkelig fysisk yteevne innebærer i praksis. Vi diskuterer hvilke oppdrag og situasjoner som stiller de høyeste kravene, hvordan fysisk kapasitet påvirker prestasjon under stress, og hvordan fysiske, mentale og taktiske krav virker sammen i operativ tjeneste. Videre ser vi nærmere på forholdet mellom opptakskrav og de reelle kravene i yrket, hva som kan defineres som “godt nok”, og forskjellen mellom å bestå tester og å prestere robust over tid. Vi diskuterer også variasjoner mellom ulike operative funksjoner, kjønnsforskjeller i fysisk kapasitet, samt belastning, skader og bærekraft i tjenesten. I tillegg belyser vi hva politiet og Forsvaret kan lære av hverandre.

• Berge, Jarle; Nunavath, Vimala; Asbjørnsen, Rikke Aune; Borgeraas, Heidi; Hertel, Jens Kristoffer & Linge, Anita Dyb [Vis alle 15 forfattere av denne artikkelen] (2026). Machine Learning for Estimating Cardiorespiratory Fitness in Patients With Obesity: Protocol for a Retrospective and Prospective Multicenter Cohort Study. doi: 10.2196/85069. Fulltekst i vitenarkiv Vis sammendrag

  Abstract Background Cardiorespiratory fitness (CRF) is a key predictor of cardiovascular and other health-related diseases in individuals with obesity. CRF is most accurately assessed through maximal exercise testing with advanced gas-analysis equipment (maximum volume of oxygen [VO 2max ]); however, this approach is time-consuming, costly, and requires specialized expertise. Therefore, submaximal tests and self-reported physical activity levels have been used to develop predictive algorithms to estimate CRF, yet they often performed poorly in individuals with low CRF levels, such as patients with obesity, because they are predominantly developed using data from healthy populations. Studies using machine learning (ML) models based on VO 2max data from patients with obesity appear to be lacking in the literature. ML models based on routinely collected clinical measures may offer a more practical and potentially accurate way to estimate CRF, reducing time, costs, and clinical burden. Objective The primary aim of this study is to use multicenter, longitudinal, real-world clinical data from a uniquely characterized population with obesity to develop and validate a clinically relevant ML model for estimating CRF and to compare its performance with the gold standard of VO 2max testing. Methods A retrospective data set combining assessments of VO 2max tests and clinical parameters from adult patients with severe obesity BMI (≥40.0 kg/m 2 or 35.0‐39.9 kg/m 2 with at least 1 obesity-related comorbidity) from Vestfold Hospital Trust, Muritunet Rehabilitation Institution, and Norwegian School of Sport Sciences will be the foundation for developing the ML model. The clinically relevant ML model for estimating CRF will be presented as a web application, allowing easy access and interaction. The model’s estimations will be compared against direct VO 2max measurements obtained from medical equipment across institutions as part of a prospective validation. Ethical approval has been obtained for the use of 2 databases in the initial model development; approval for the remaining data and prospective phase is pending. Results Vestfold Hospital Trust, the Norwegian School of Sport Medicine, and Muritunet Rehabilitation Institution conducted more than 2623 VO ₂max tests and collected clinical parameters from 1279 adults with severe obesity during 2013-2025, both before, during, and after lifestyle interventions. The first scientific publication of the clinically relevant ML model is expected to be published in 2026. The results of the overall project are expected to be completed in 2028. The project was awarded salary funding in two rounds from Vestfold Hospital (October and December 2023) and salary funding from the Research Council of Norway (October 2024). In addition, the project received allocated supervision hours from InnoMed Norway (April 2024). Conclusions This project aims to develop a clinically relevant ML model, which serves as a cost-effective tool for CRF estimation in individuals with obesity, improving accessibility to this important health marker. To our knowledge, this is the first initiative in Norway to estimate CRF in individuals with obesity using ML, based on a unique clinical database. The project carries substantial societal value and holds national and international relevance for health care practice and patient outcomes.

• Bratland-Sanda, Solfrid; Støa, Eva Maria; Sanda, Åsmund; Reinboth, Michael Sæther; Ringheim, Henriette Kaasa & Berge, Jarle [Vis alle 7 forfattere av denne artikkelen] (2023). Fit for beredskap! Helse og livsstil som sikkerhetsfaktor blant funksjonsrettede ledere i politiet. Fulltekst i vitenarkiv
• Jenssen, Ole Ragnar N. & Gjevestad, Espen Svendsen (2023). Fysisk form, trening og ernæring: forberedelse til oppdraget. I Bergsjø, Per; Sandvik, Asle Makoto & Meland, Sigurd (Red.), Politipatruljen: en lærebok i patruljetjeneste. Fagbokforlaget. ISSN 9788245039924. s. 41–58. Fulltekst i vitenarkiv
• Henneseid, Linn; Jenssen, Ole Ragnar N. & Gjevestad, Espen Svendsen (2023). Førstehjelp. I Bergsjø, Per; Sandvik, Asle Makoto & Meland, Sigurd (Red.), Politipatruljen: en lærebok i patruljetjeneste. Fagbokforlaget. ISSN 9788245039924. s. 219–232. Fulltekst i vitenarkiv
• Sandvik, Asle Makoto; Gjevestad, Espen Svendsen; Einar, Aabrekk; Peter, Øhman; Kjendlie, Per-Ludvik & Hystad, Sigurd William [Vis alle 9 forfattere av denne artikkelen] (2018). Physical fitness and psychological hardiness as predictors of autonomic self-regulation during stress. A Norwegian police simulator training study. Fulltekst i vitenarkiv
• Nordstrand, Njord; Hertel, Jens Kristoffer; Os, Ingrid; Gjevestad, Espen Svendsen & Hjelmesæth, Jøran (2012). The impact of intensive lifestyle intervention and a low calorie diet on arterial stiffness in morbidly obese patients - a nonrandomized clinical trial. Fulltekst i vitenarkiv

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