PubMed

Normal function of the hypothalamic-pituitary growth axis in three dwarf Friesian foals.

de Graaf-Roelfsema E, Back W, Keizer HA, Stout TA, van der Kolk JH.

Vet Rec. 2009 Sep 26;165(13):373-6.PMID: 19783851 [PubMed - in process]Related articles

Overtrained horses alter their resting pulsatile growth hormone secretion.

de Graaf-Roelfsema E, Veldhuis PP, Keizer HA, van Ginneken MM, van Dam KG, Johnson ML, Barneveld A, Menheere PP, van Breda E, Wijnberg ID, van der Kolk JH.

Am J Physiol Regul Integr Comp Physiol. 2009 Aug;297(2):R403-11. Epub 2009 Jun 3.PMID: 19494168 [PubMed - indexed for MEDLINE]Related articles

Plasma acylcarnitine and fatty acid profiles during exercise and training in Standardbreds.

Westermann CM, Dorland B, de Sain-van der Velden MG, Wijnberg ID, Van Breda E, De Graaf-Roelfsema E, Keizer HA, Van der Kolk JH.

Am J Vet Res. 2008 Nov;69(11):1469-75.PMID: 18980429 [PubMed - indexed for MEDLINE]Related articles

(Over)training effects on quantitative electromyography and muscle enzyme activities in standardbred horses.

Wijnberg ID, van Dam KG, Graaf-Roelfsema E, Keizer HA, van Ginneken MM, Barneveld A, Breda E, van der Kolk JH.

J Appl Physiol. 2008 Dec;105(6):1746-53. Epub 2008 Oct 2.PMID: 18832760 [PubMed - indexed for MEDLINE]Related articles

Long-standing, insulin-treated type 2 diabetes patients with complications respond well to short-term resistance and interval exercise training.

Praet SF, Jonkers RA, Schep G, Stehouwer CD, Kuipers H, Keizer HA, van Loon LJ.

Eur J Endocrinol. 2008 Feb;158(2):163-72.PMID: 18230822 [PubMed - indexed for MEDLINE]Related articlesFree article

Hormonal responses to acute exercise, training and overtraining. A review with emphasis on the horse.

de Graaf-Roelfsema E, Keizer HA, van Breda E, Wijnberg ID, van der Kolk JH.

Vet Q. 2007 Sep;29(3):82-101. Review.PMID: 17970286 [PubMed - indexed for MEDLINE]Related articles

Whole-body vibration induced adaptation in knee extensors; consequences of initial strength, vibration frequency, and joint angle.

Savelberg HH, Keizer HA, Meijer K.

J Strength Cond Res. 2007 May;21(2):589-93.PMID: 17530984 [PubMed - indexed for MEDLINE]Related articles

The effect of long-term exercise on glucose metabolism and peripheral insulin sensitivity in standardbred horses.

de Graaf-Roelfsema E, van Ginneken ME, van Breda E, Wijnberg ID, Keizer HA, van der Kolk JH.

Equine Vet J Suppl. 2006 Aug;(36):221-5.PMID: 17402422 [PubMed - indexed for MEDLINE]Related articles

Influence of acute exercise on hyperglycemia in insulin-treated type 2 diabetes.

Praet SF, Manders RJ, Lieverse AG, Kuipers H, Stehouwer CD, Keizer HA, van Loon LJ.

Med Sci Sports Exerc. 2006 Dec;38(12):2037-44.PMID: 17146308 [PubMed - indexed for MEDLINE]Related articles

Substrate source utilisation in long-term diagnosed type 2 diabetes patients at rest, and during exercise and subsequent recovery.

Boon H, Blaak EE, Saris WH, Keizer HA, Wagenmakers AJ, van Loon LJ.

Diabetologia. 2007 Jan;50(1):103-12. Epub 2006 Nov 28.PMID: 17131144 [PubMed - indexed for MEDLINE]Related articles

Effect of exercise on activation of the p38 mitogen-activated protein kinase pathway, c-Jun NH2 terminal kinase, and heat shock protein 27 in equine skeletal muscle.

van Ginneken MM, de Graaf-Roelfsema E, Keizer HA, van Dam KG, Wijnberg ID, van der Kolk JH, van Breda E.

Am J Vet Res. 2006 May;67(5):837-44.PMID: 16649919 [PubMed - indexed for MEDLINE]Related articles

Glycaemic instability is an underestimated problem in Type II diabetes.

Praet SF, Manders RJ, Meex RC, Lieverse AG, Stehouwer CD, Kuipers H, Keizer HA, van Loon LJ.

Clin Sci (Lond). 2006 Aug;111(2):119-26.PMID: 16613586 [PubMed - indexed for MEDLINE]Related articles

Effects of increasing insulin secretion on acute postexercise blood glucose disposal.

Kaastra B, Manders RJ, Van Breda E, Kies A, Jeukendrup AE, Keizer HA, Kuipers H, Van Loon LJ.

Med Sci Sports Exerc. 2006 Feb;38(2):268-75.PMID: 16531895 [PubMed - indexed for MEDLINE]Related articles

Effects of short- and long-term recombinant equine growth hormone and short-term hydrocortisone administration on tissue sensitivity to insulin in horses.

de Graaf-Roelfsema E, Tharasanit T, van Dam KG, Keizer HA, van Breda E, Wijnberg ID, Stout TA, van der Kolk JH.

Am J Vet Res. 2005 Nov;66(11):1907-13.PMID: 16334949 [PubMed - indexed for MEDLINE]Related articles

Inhibition of adipose tissue lipolysis increases intramuscular lipid use in type 2 diabetic patients.

van Loon LJ, Manders RJ, Koopman R, Kaastra B, Stegen JH, Gijsen AP, Saris WH, Keizer HA.

Diabetologia. 2005 Oct;48(10):2097-107. Epub 2005 Aug 12.PMID: 16096823 [PubMed - indexed for MEDLINE]Related articles

Inhibition of adipose tissue lipolysis increases intramuscular lipid and glycogen use in vivo in humans.

van Loon LJ, Thomason-Hughes M, Constantin-Teodosiu D, Koopman R, Greenhaff PL, Hardie DG, Keizer HA, Saris WH, Wagenmakers AJ.

Am J Physiol Endocrinol Metab. 2005 Sep;289(3):E482-93. Epub 2005 May 10.PMID: 15886227 [PubMed - indexed for MEDLINE]Related articlesFree article

A single session of resistance exercise enhances insulin sensitivity for at least 24 h in healthy men.

Koopman R, Manders RJ, Zorenc AH, Hul GB, Kuipers H, Keizer HA, van Loon LJ.

Eur J Appl Physiol. 2005 May;94(1-2):180-7. Epub 2005 Mar 11.PMID: 15761746 [PubMed - indexed for MEDLINE]Related articles

The effects of exercise and adipose tissue lipolysis on plasma adiponectin concentration and adiponectin receptor expression in human skeletal muscle.

Punyadeera C, Zorenc AH, Koopman R, McAinch AJ, Smit E, Manders R, Keizer HA, Cameron-Smith D, van Loon LJ.

Eur J Endocrinol. 2005 Mar;152(3):427-36.PMID: 15757860 [PubMed - indexed for MEDLINE]Related articlesFree article

Physiological, biochemical and psychological markers of strenuous training-induced fatigue.

Rietjens GJ, Kuipers H, Adam JJ, Saris WH, van Breda E, van Hamont D, Keizer HA.

Int J Sports Med. 2005 Jan-Feb;26(1):16-26.PMID: 15643530 [PubMed - indexed for MEDLINE]Related articles

Combined ingestion of protein and free leucine with carbohydrate increases postexercise muscle protein synthesis in vivo in male subjects.

Koopman R, Wagenmakers AJ, Manders RJ, Zorenc AH, Senden JM, Gorselink M, Keizer HA, van Loon LJ.

Am J Physiol Endocrinol Metab. 2005 Apr;288(4):E645-53. Epub 2004 Nov 23.PMID: 15562251 [PubMed - indexed for MEDLINE]Related articlesFree article

A modified PAS stain combined with immunofluorescence for quantitative analyses of glycogen in muscle sections.

Schaart G, Hesselink RP, Keizer HA, van Kranenburg G, Drost MR, Hesselink MK.

Histochem Cell Biol. 2004 Aug;122(2):161-9. Epub 2004 Aug 3.PMID: 15322861 [PubMed - indexed for MEDLINE]Related articles

Investigation of the expression and localization of glucose transporter 4 and fatty acid translocase/CD36 in equine skeletal muscle.

van Dam KG, van Breda E, Schaart G, van Ginneken MM, Wijnberg ID, de Graaf-Roelfsema E, van der Kolk JH, Keizer HA.

Am J Vet Res. 2004 Jul;65(7):951-6.PMID: 15281654 [PubMed - indexed for MEDLINE]Related articles

Intramyocellular lipid content in type 2 diabetes patients compared with overweight sedentary men and highly trained endurance athletes.

van Loon LJ, Koopman R, Manders R, van der Weegen W, van Kranenburg GP, Keizer HA.

Am J Physiol Endocrinol Metab. 2004 Sep;287(3):E558-65. Epub 2004 May 27.PMID: 15165998 [PubMed - indexed for MEDLINE]Related articlesFree article

Effects of androgenic-anabolic steroids on apolipoproteins and lipoprotein (a).

Hartgens F, Rietjens G, Keizer HA, Kuipers H, Wolffenbuttel BH.

Br J Sports Med. 2004 Jun;38(3):253-9.PMID: 15155420 [PubMed - indexed for MEDLINE]Related articlesFree article

Subcellular immunolocalisation of fatty acid translocase (FAT)/CD36 in human type-1 and type-2 skeletal muscle fibres.

Keizer HA, Schaart G, Tandon NN, Glatz JF, Luiken JJ.

Histochem Cell Biol. 2004 Feb;121(2):101-7. Epub 2004 Jan 23.PMID: 14740222 [PubMed - indexed for MEDLINE]Related articles

Immunohistochemical identification and fiber type specific localization of protein kinase C isoforms in equine skeletal muscle.

van Ginneken MM, Keizer HA, Wijnberg ID, van Dam KG, Schaart G, de Graaf-Roelfsema E, van der Kolk JH, van Breda E.

Am J Vet Res. 2004 Jan;65(1):69-73.PMID: 14719705 [PubMed - indexed for MEDLINE]Related articles

Intramyocellular lipids form an important substrate source during moderate intensity exercise in endurance-trained males in a fasted state.

van Loon LJ, Koopman R, Stegen JH, Wagenmakers AJ, Keizer HA, Saris WH.

J Physiol. 2003 Dec 1;553(Pt 2):611-25. Epub 2003 Sep 26.PMID: 14514877 [PubMed - indexed for MEDLINE]Related articlesFree article

Androgenic anabolic steroid use and severe hypothalamic-pituitary dysfunction: a case study.

van Breda E, Keizer HA, Kuipers H, Wolffenbuttel BH.

Int J Sports Med. 2003 Apr;24(3):195-6.PMID: 12740738 [PubMed - indexed for MEDLINE]Related articles

Diminished performance on response-selection tasks in Type 2 diabetes.

de Groot PC, Borghouts LB, Adam JJ, Keizer HA.

Percept Mot Skills. 2003 Feb;96(1):257-66.PMID: 12705534 [PubMed - indexed for MEDLINE]Related articles

Amino acid ingestion strongly enhances insulin secretion in patients with long-term type 2 diabetes.

van Loon LJ, Kruijshoop M, Menheere PP, Wagenmakers AJ, Saris WH, Keizer HA.

Diabetes Care. 2003 Mar;26(3):625-30.PMID: 12610012 [PubMed - indexed for MEDLINE]Related articlesFree article

Substrate utilization in non-obese Type II diabetic patients at rest and during exercise.

Borghouts LB, Wagenmakers AJ, Goyens PL, Keizer HA.

Clin Sci (Lond). 2002 Dec;103(6):559-66.PMID: 12444908 [PubMed - indexed for MEDLINE]Related articles

Red blood cell profile of elite olympic distance triathletes. A three-year follow-up.

Rietjens GJ, Kuipers H, Hartgens F, Keizer HA.

Int J Sports Med. 2002 Aug;23(6):391-6.PMID: 12215956 [PubMed - indexed for MEDLINE]Related articles

Evidence of insulin resistant lipid metabolism in adipose tissue in familial combined hyperlipidemia, but not type 2 diabetes mellitus.

van der Kallen CJ, Voors-Pette C, Bouwman FG, Keizer HA, Lu JY, van de Hulst RR, Bianchi R, Janssen MJ, Keulen ET, Boeckx WD, Rotter JI, de Bruin TW.

Atherosclerosis. 2002 Oct;164(2):337-46.PMID: 12204806 [PubMed - indexed for MEDLINE]Related articles

Misuse of androgenic-anabolic steroids and human deltoid muscle fibers: differences between polydrug regimens and single drug administration.

Hartgens F, van Straaten H, Fideldij S, Rietjens G, Keizer HA, Kuipers H.

Eur J Appl Physiol. 2002 Jan;86(3):233-9.PMID: 11990732 [PubMed - indexed for MEDLINE]Related articles

A reduction in training volume and intensity for 21 days does not impair performance in cyclists.

Rietjens GJ, Keizer HA, Kuipers H, Saris WH.

Br J Sports Med. 2001 Dec;35(6):431-4.PMID: 11726481 [PubMed - indexed for MEDLINE]Related articlesFree article

Uncoupling protein 3 content is decreased in skeletal muscle of patients with type 2 diabetes.

Schrauwen P, Hesselink MK, Blaak EE, Borghouts LB, Schaart G, Saris WH, Keizer HA.

Diabetes. 2001 Dec;50(12):2870-3.PMID: 11723073 [PubMed - indexed for MEDLINE]Related articlesFree article

[Long-term intensive athletic training; few adverse effects on later physical health]

Kuipers H, Keizer HA, Schep G, Hoogeveen AR.

Ned Tijdschr Geneeskd. 2001 Jun 9;145(23):1101-4. Review. Dutch. PMID: 11450601 [PubMed - indexed for MEDLINE]Related articles

Validation of a computerized metabolic measurement system (Oxycon-Pro) during low and high intensity exercise.

Rietjens GJ, Kuipers H, Kester AD, Keizer HA.

Int J Sports Med. 2001 May;22(4):291-4.PMID: 11414673 [PubMed - indexed for MEDLINE]Related articles

Protein expression of UCP3 differs between human type 1, type 2a, and type 2b fibers.

Hesselink MK, Keizer HA, Borghouts LB, Schaart G, Kornips CF, Slieker LJ, Sloop KW, Saris WH, Schrauwen P.

FASEB J. 2001 Apr;15(6):1071-3. No abstract available. PMID: 11292671 [PubMed - indexed for MEDLINE]Related articlesFree article

GLUT-4 expression is not consistently higher in type-1 than in type-2 fibres of rat and human vastus lateralis muscles; an immunohistochemical study.

Borghouts LB, Schaart G, Hesselink MK, Keizer HA.

Pflugers Arch. 2000 Dec;441(2-3):351-8.PMID: 11211123 [PubMed - indexed for MEDLINE]Related articles

Exercise and insulin sensitivity: a review.

Borghouts LB, Keizer HA.

Int J Sports Med. 2000 Jan;21(1):1-12. Review.PMID: 10683091 [PubMed - indexed for MEDLINE]Related articles

['Diabetes mellitus type 2' guideline (first revision) of the Dutch College of General Practitioners]

Kuipers H, Keizer HA.

Ned Tijdschr Geneeskd. 1999 Nov 13;143(46):2342-3. Dutch. No abstract available. PMID: 10589232 [PubMed - indexed for MEDLINE]Related articles

Influence of exercise and menstrual cycle phase on plasma homocyst(e)ine levels in young women--a prospective study.

De Crée C, Malinow MR, van Kranenburg GP, Geurten PG, Longford NT, Keizer HA.

Scand J Med Sci Sports. 1999 Oct;9(5):272-8.PMID: 10512207 [PubMed - indexed for MEDLINE]Related articles

Effect of training intensity on insulin sensitivity as evaluated by insulin tolerance test.

Borghouts LB, Backx K, Mensink MF, Keizer HA.

Eur J Appl Physiol Occup Physiol. 1999 Oct;80(5):461-6.PMID: 10502080 [PubMed - indexed for MEDLINE]Related articles

Three months use of third-generation oral contraceptives does not affect artery wall properties.

Willekes C, Hoogland HJ, Keizer HA, Hoeks AP, Reneman RS.

Ultrasound Med Biol. 1999 Jun;25(5):723-8.PMID: 10414888 [PubMed - indexed for MEDLINE]Related articles

Pre-exercise ingestion of carbohydrate and transient hypoglycemia during exercise.

Kuipers H, Fransen EJ, Keizer HA.

Int J Sports Med. 1999 May;20(4):227-31.PMID: 10376478 [PubMed - indexed for MEDLINE]Related articles

Different metabolic adaptation of heart and skeletal muscles to moderate-intensity treadmill training in the rat.

Zonderland ML, Bär PR, Reijneveld JC, Spruijt BM, Keizer HA, Glatz JF.

Eur J Appl Physiol Occup Physiol. 1999 Apr;79(5):391-6.PMID: 10208246 [PubMed - indexed for MEDLINE]Related articles

Lumbar bone mineral density in adolescent female runners.

Moen SM, Sanborn CF, DiMarco NM, Gench B, Bonnick SL, Keizer HA, Menheere PP.

J Sports Med Phys Fitness. 1998 Sep;38(3):234-9.PMID: 9830831 [PubMed - indexed for MEDLINE]Related articles

Acute and sustained effects of isometric and lengthening muscle contractions on high-energy phosphates and glycogen metabolism in rat tibialis anterior muscle.

Hesselink MK, Kuipers H, Keizer HA, Drost MR, van der Vusse GJ.

J Muscle Res Cell Motil. 1998 May;19(4):373-80.PMID: 9635280 [PubMed - indexed for MEDLINE]Related articles

Responsiveness of plasma 2- and 4-hydroxycatecholestrogens to training and to graduate submaximal and maximal exercise in an untrained woman. Interuniversity Project on Reproductive Endocrinology in Women and Exercise.

De Crée C, Ball P, Seidlitz B, Van Kranenburg G, Geurten P, Keizer HA.

Int J Sports Med. 1998 Jan;19(1):20-5.PMID: 9506795 [PubMed - indexed for MEDLINE]Related articles