Browse by Lectorate "Sport en Voeding"

Now showing items 51-64 of 64

The Effect of Beetroot Juice Supplementation on Dynamic Apnea and Intermittent Sprint Performance in Elite Female Water Polo Players
Jonvik, K.L. ; Dijk, J.W. van ; Senden, J.M.G. ; Loon, L.J.C. van ; Verdijk, L.B.
2018, Article / Letter to editor (International Journal of Sport Nutrition and Exercise Metabolism, vol. 28, iss. 5, (2018), pp. 468-473)
Eet je fit
Brinkmans, N.
2020, Contribution for newspaper or weekly magazine (Allerhande, , pp. 34-41)
Do Paralympic athletes suffer from brittle bones?
Weijer, V.C.R. ; Jonvik, K.L. ; Loon, L.J.C. van ; Raastad, T ; Dijk, J.W. van
2021, Article in monograph or in proceedings (European College of Sport Science)
COMMENTARY ON VIEWPOINT: A TIME FOR EXERCISE: THE EXERCISE WINDOW
Dijk, J.W. van ; Loon, L.J.C. van
2017, Article / Letter to editor (Journal of Applied Physiology, vol. 122, iss. 1, (2017), pp. 212-213)
Commentaries on Viewpoint: Do we need to change the guideline values for determining low bone mineral density in athletes?
Weijer, V. ; Hilkens, L. ; Brinkmans, N. ; Dijk, J.W. van ; Srivastav, S. ; Gadhvi, M.A. ; Fernandes, R.J. ; Filho, D.P. ; Santos, M.P.
2022, Article / Letter to editor (Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology, vol. 132, iss. 5, (2022), pp. 1323-1324)
Commentaries on Viewpoint: A time for exercise: the exercise window.
Boulé, N.G. ; Terada, T. ; Francois, M.E. ; Hawley, J.A. ; Cotter, J.D. ; Kruse, N.T. ; McDonald, M.W. ; Olver, T.D. ; Paoli, A. ; Sacchetti, M. ; Luigi, L. Di ; Dijk, J.W. van ; Loon, L.J.C. van ; Yardley, J. ; DiPietro, L. ; Gribok, A. ; Rumpler, W. et al. sine al.
2017, Article / Letter to editor (Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology, vol. 122, iss. 1, (2017), pp. 210-213)
Circulating cardiac troponin T exhibits a diurnal rhythm.
Klinkenberg, L.J. ; Dijk, J.W. van ; Tan, F.E. ; Loon, L.J.C. van ; Dieijen-Visser, M.P. van ; Meex, S.J.
2014, Article / Letter to editor (Journal of the American College of Cardiology, vol. 63, iss. 17, (2014), pp. 1788-1795)OBJECTIVES: The goal of this study was to test the unverified assumption that chronically elevated cardiac troponin T (cTnT) levels fluctuate randomly around a homeostatic set point. BACKGROUND: The introduction of high-sensitivity cardiac troponin (cTn) assays has improved sensitivity for acute myocardial infarction (AMI). However, many patients with a single positive cTn test result do not have AMI. Therefore, the diagnosis of AMI relies strongly on serial testing and interpretation of cTn kinetics. Essential in this regard is a profound understanding of the biological variation of cTn. METHODS: Two studies were conducted to assess biological cTnT variation and to investigate the presence of a diurnal rhythm of cTnT. Study 1 comprised 23 male subjects with type 2 diabetes, with no acute cardiovascular disease. Serial venous blood samples were drawn over an 11-h period (8:30 am to 7:30 pm). In study 2, the presence of a diurnal cTnT rhythm was investigated by hourly sampling of 7 subjects from study 1 over 25 h. RESULTS: In study 1, we observed a gradual decrease in cTnT concentrations during the day (24 ± 2%). This decrease was present in all participants and was most prominent in subjects with the highest baseline cTnT values (Pearson's R 0.93). Diurnal variation of cTnT, as assessed in study 2, was characterized by peak concentrations during morning hours (8:30 am, 17.1 ± 2.9 ng/l), gradually decreasing values during daytime (8:30 pm, 11.9 ± 1.6 ng/l), and rising concentrations during nighttime (8:30 am the next day, 16.9 ± 2.8 ng/l). CONCLUSIONS: A diurnal cTnT rhythm substantiates the recommendation that all dynamic changes in cTnT should be interpreted in relation to the clinical presentation. Epidemiological studies and risk-stratification protocols with the use of cTnT may benefit from standardized sampling times. (Exercise and Glycemic Control in Type 2 Diabetes; NCT00945165).
Bone turnover following high-impact exercise is not modified by collagen supplementation in young men: a randomized cross-over trial
Hilkens, L.P.M.
2022, Article in monograph or in proceedings (Bone turnover following high-impact exercise is not modified by collagen supplementation in young men: a randomized cross-over trial)
Body composition in professional football players: practical implications
Brinkmans, N.
2020, Article in monograph or in proceedings (Science in Sport Football webinar series)
Body composition in professional football players: a method comparison
Brinkmans, N.
2019, Article in monograph or in proceedings (ISENC)
Basal and Postprandial Myofibrillar Protein Synthesis Rates Do Not Differ between Lean and Obese Middle-Aged Men
Kouw, I.W.K. ; Dijk, J.W. van ; Horstman, A.M. ; Kramer, I.F. ; Goessens, J.P.B. ; Dielen, F.M.H van ; Verdijk, L.B. ; Loon, L.J.C. van
2019, Article / Letter to editor (Journal of Nutrition, vol. 149, iss. 9, (2019), pp. 1533-1542)
The association between gastrointestinal injury, complaints, and food intake in 60-km ultramarathon runners.
Venrooij, N.F.J. van ; Wardenaar, F.C. ; Hoogervorst, D. ; Senden, J.M.G. ; Dijk, J.W. van ; Jonvik, K.L.
2022, Article / Letter to editor (Applied Physiology, Nutrition, and Metabolism, vol. 47, iss. 5, (2022), pp. 547-554)We aimed to assess the association between gastrointestinal (GI) injury, complaints, and food intake in 60-km ultramarathon runners. Thirty-three ultramarathon runners provided pre- and post-race blood samples for assessment of GI injury by intestinal fatty-acid binding protein (I-FABP), and inflammatory response by interleukin (IL)-6, IL-8, tumour necrosis factor alpha (TNF-α), and C-reactive protein (CRP). GI complaints and nutritional intake were reported by a post-race questionnaire. GI complaints were reported by 73% of the runners, of which 20% reported 1 or 2 severe complaints. IL-6, IL8, TNF-α, and CRP increased significantly from pre- to post-race (P < 0.001 for all biomarkers), while I-FABP did not (1375 [IQR: 1264-2073] to 1726 [IQR: 985-3287] pg/mL; P = 0.330). The 'GI complaints score', as the integral of the number and severity of GI complaints, did not correlate with ΔI-FABP (rs: -0.050, P = 0.790) or energy intake (rs: 0.211, P = 0.260). However, there was a significant negative correlation between energy intake and ΔI-FABP (rs: -0.388, P = 0.031). In conclusion, GI complaints were neither associated with food intake nor GI injury as assessed by plasma I-FABP response. Energy intake, however, was inversely related to the I-FABP response to exercise. This finding suggests that substantial energy intakes during exercise may prevent exercise-induced GI injury as assessed by the I-FABP response. Novelty: No association between gastrointestinal complaints and gastrointestinal injury (I-FABP response) or food intake was present. There was an inverse correlation between energy intake and plasma I-FABP response, suggesting that higher energy intakes may prevent gastrointestinal injury as assessed by the I-FABP response.
Adipose tissue lipolytic inhibition enhances the glucoregulatory properties of exercise in type 2 diabetes patients
Hansen, D. ; Verboven, K. ; Dijk, J.W. van ; Zorenc, A. ; Minten, L. ; Smeets, K. ; Verdijk, L.B. ; Loon, L.J.C. van
2018, Article / Letter to editor (European Journal of Sport Science, vol. 18, iss. 9, (2018), pp. 1245-1254)
A 3-day EGCG-supplementation reduces interstitial lactate concentration in skeletal muscle of overweight subjects.
Most, J. ; Can, J.G. van ; Dijk, J.W. van ; Goossens, G.H. ; Jocken, J. ; Hospers, J.J. ; Bendik, I. ; Blaak, E.E.
2015, Article / Letter to editor (Scientific Reports, vol. 5, (2015), pp. 17896)Green tea, particularly epigallocatechin-3-gallate (EGCG), may affect body weight and composition, possibly by enhancing fat oxidation. The aim of this double-blind, randomized placebo-controlled cross-over study was to investigate whether 3-day supplementation with EGCG (282 mg/day) stimulates fat oxidation and lipolysis in 24 overweight subjects (age = 30 ± 2 yrs, BMI = 27.7 ± 0.3 kg/m(2)). Energy expenditure, substrate metabolism and circulating metabolites were determined during fasting and postprandial conditions. After 6 h, a fat biopsy was collected to examine gene expression. In 12 subjects, skeletal muscle glycerol, glucose and lactate concentrations were determined using microdialysis. EGCG-supplementation did not alter energy expenditure and substrate oxidation compared to placebo. Although EGCG reduced postprandial circulating glycerol concentrations (P = 0.015), no difference in skeletal muscle lipolysis was observed. Fasting (P = 0.001) and postprandial (P = 0.003) skeletal muscle lactate concentrations were reduced after EGCG-supplementation compared to placebo, despite similar tissue blood flow. Adipose tissue leptin (P = 0.05) and FAT/CD36 expression (P = 0.08) were increased after EGCG compared to placebo. In conclusion, 3-day EGCG-supplementation decreased postprandial plasma glycerol concentrations, but had no significant effects on skeletal muscle lipolysis and whole-body fat oxidation in overweight individuals. Furthermore, EGCG decreased skeletal muscle lactate concentrations, which suggest a shift towards a more oxidative muscle phenotype.

Now showing items 51-64 of 64

Browse by Lectorate "Sport en Voeding"

Browse

All of HAN Publications

This Collection