IOM (Institute of Medicine) (2011) Dietary reference intakes for calcium and vitamin D. The National Academies Press, Washington
Google Scholar
Holick M, Chen T (2008) Vitamin D deficiency: a worldwide problem with health consequences. Am J Clin Nutr 87(4):1080S–1086S
CAS
Google Scholar
Magee PJ, Pourshahidi LK, Wallace JMW, Cleary J, Conway J, Harney E et al (2013) Vitamin D status and supplementation in elite Irish athletes. Int J Sport Nutr Exerc Metab 23(5):441–448
CAS
Article
Google Scholar
Villacis D, Yi A, Jahn R, Kephart C, Charlton T, Gamradt S et al (2014) Prevalence of abnormal vitamin D levels among division I NCAA athletes. Sports Health 6(4):640–647
Article
Google Scholar
Farrokhyar F, Tabasinejad R, Dao D, Peterson D, Ayeni O, Hadioonzadeh R et al (2015) Prevalence of vitamin D inadequacy in athletes: a systematic-review and meta-analysis. Sports Med 45(3):365–378
Article
Google Scholar
Christodoulou S, Goula T, Ververidis A, Drosos G (2013) Vitamin D and bone disease. Biomed Res Int 396541:1–6
Article
Google Scholar
Todd JJ, Pourshahidi LK, McSorley EM, Madigan SM, Magee PJ (2015) Vitamin D: recent advances and implications for athletes. Sports Med 45(2):213–219
Article
Google Scholar
Webb AR (2006) Who, what, where and when-influences on cutaneous vitamin D synthesis. Prog Biophys Mol Biol 92(1):17–25
CAS
Article
Google Scholar
Stephensen CB, Zerofsky M, Burnett DJ, Lin YP, Hammock BD, Hall LM et al (2012) Ergocalciferol from mushrooms or supplements consumed with a standard meal increases 25-hydroxyergocalciferol but decreases 25-hydroxycholecalciferol in the serum of healthy adults. J Nutr 142(7):1246–1252
CAS
Article
Google Scholar
Chen TC, Chimeh F, Lu Z, Mathieu J, Person KS, Zhang A et al (2007) Factors that influence the cutaneous synthesis and dietary sources of vitamin D. Arch Biochem Biophys 460(2):213–217
CAS
Article
Google Scholar
Aranow C (2011) Vitamin D and the immune system. J Invest Med 59(6):881–886
CAS
Article
Google Scholar
Haussler M, Haussler C, Jurutka P, Thompson P, Hsieh J, Remus L et al (1997) The vitamin D hormone and its nuclear receptor: molecular actions and disease states. J Endocrinol 154:S57–S73
CAS
Article
Google Scholar
Farrell S, Cleaver J, Willis B (2011) Cardiorespiratory fitness, adiposity, and serum 25-dihydroxyvitamin D levels in men. Med Sci Sports Exerc 43(2):266–271
CAS
Article
Google Scholar
Fitzgerald J, Peterson B, Warpeha J, Wilson P, Rhodes G, Ingraham S (2014) Vitamin D status and V[combining dot above]O2peak during a skate treadmill graded exercise test in competitive ice hockey players. J Strength Cond Res 28(11):3200–3205
Article
Google Scholar
Forney LA, Earnest CP, Henagan TM, Johnson LE, Castleberry TJ, Stewart LK (2014) Vitamin D status, body composition, and fitness measures in college-aged students. J Strength Cond Res 28(3):814–824
Article
Google Scholar
Gregory SM, Parker BA, Capizzi JA, Grimaldi AS, Clarkson PM, Moeckel-Cole S et al (2013) Changes in vitamin D are not associated with changes in cardiorespiratory fitness. Clin Med Res 2(4):68–72
Article
Google Scholar
Koundourakis N, Androulakis N, Malliaraki N, Margioris A (2014) Vitamin D and exercise performance in professional soccer players. PLoS One 1(7):e101659
Article
Google Scholar
Fitzgerald JS, Peterson BJ, Warpeha JM, Johnson SC, Ingraham SJ (2015) Association between Vitamin D Status and maximal-intensity exercise performance in junior and collegiate hockey players. J Strength Cond Res 29(9):13–21
Article
Google Scholar
Dahlquist DT, Dieter BP, Koehle MS (2015) Plausible ergogenic effects of vitamin D on athletic performance and recovery. J Int Soc Sports Nutr 12(33):1–12
Google Scholar
Helgerud J, Engen L, Wisloff U, Hoff J (2001) Aerobic endurance training improves soccer performance. Med Sci Sports Exerc 33(11):1925–1931
CAS
Article
Google Scholar
Bassett D, Howley E (2000) Limiting factors for maximum oxygen uptake and determinants of endurance performance. Med Sci Sports Exerc 31(1):70–84
Article
Google Scholar
Autier P, Boniol M, Pizot C, Mullie P (2014) Vitamin D status and ill health: a systematic review. Lancet Diabetes Endocrinol 2(1):76–89
CAS
Article
Google Scholar
Toxqui L, Pérez-Granados AM, Blanco-Rojo R, Wright I, González-Vizcayno C, Vaquero MP (2013) Effects of an iron or iron and vitamin D-fortified flavored skim milk on iron metabolism: a randomized controlled double-blind trial in iron-deficient women. J Am Coll Nutr 32(5):312–320
CAS
Article
Google Scholar
Bacchetta J, Zaritsky JJ, Sea JL, Chun RF, Lisse TS, Zavala K et al (2014) Suppression of iron-regulatory hepcidin by vitamin D. J Am Soc Nephrol 25(3):564–572
CAS
Article
Google Scholar
Zughaier SM, Alvarez JA, Sloan JH, Konrad RJ, Tangpricha V (2014) The role of vitamin D in regulating the iron-hepcidin-ferroportin axis in monocytes. J Clin Transl Endocrinol 1(1):19–25
Article
Google Scholar
Nemeth E, Ganz T (2006) Regulation of iron metabolism by hepcidin. Annu Rev Nutr 26:323–342
CAS
Article
Google Scholar
Ganz T, Nemeth E (2012) Hepcidin and iron homeostasis. Biochim Biophys Acta 1823(9):1434–1443
CAS
Article
Google Scholar
Rossi E (2005) Hepcidin: the iron regulatory hormone. Clin Biochem Rev 26(3):47–49
Google Scholar
Ghiasvand R, Askari G, Malekzadeh J, Hajishafiee M, Daneshvar P, Akbari F et al (2012) Effects of six weeks of β-alanine administration on VO2 max, time to exhaustion and lactate concentrations in physical education students. Int J Prev Med 3(8):559–563
Google Scholar
Durkalec-Michalski K, Jeszka J (2015) The efficacy of a β-hydroxy-β-methylbutyrate supplementation on physical capacity, body composition and biochemical markers in elite rowers: a randomised, double-blind, placebo-controlled crossover study. J Int Soc Sports Nutr 12:31
Article
Google Scholar
Wolpern AE, Burgos DJ, Janot JM, Dalleck LC (2015) Is a threshold-based model a superior method to the relative percent concept for establishing individual exercise intensity? a randomized controlled trial. BMC Sports Sci Med Rehabil 7(16):1–9
Google Scholar
Minim: Allocation by minimisation in clinical trials [homepage on the Internet]. 14th Mar 2013. Available from: https://www-users.york.ac.uk/~mb55/guide/minim.htm
Holick MF, Binkley NC, Bischoff-Ferrari HA, Gordon CM, Hanley DA, Heaney RP et al (2011) Evaluation, treatment, and prevention of vitamin D deficiency: an endocrine society clinical practice guideline. J Clin Endocrinol Metab 96(7):1911–1930
CAS
Article
Google Scholar
Cannell JJ, Hollis BW, Zasloff M, Heaney RP (2008) Diagnosis and treatment of vitamin D deficiency. Expert Opin Pharmacother 9(1):107–118
CAS
Article
Google Scholar
Bischoff-Ferrari HA, Giovannucci E, Willett WC, Dietrich T, Dawson-Hughes B (2006) Estimation of optimal serum concentrations of 25-hydroxyvitamin D for multiple health outcomes. Am J Clin Nutr 84(1):18–28
CAS
Google Scholar
Lips P (2006) Vitamin D physiology. Prog Biophys Mol Biol 92(1):4–8
CAS
Article
Google Scholar
McNeely MDD (2005) The estimated glomerular filtration rate: linchpin of the chronic kidney disease guidelines. BCM J 2005(47):287–291
Google Scholar
Al-Badr W, Martin KJ (2008) Vitamin D and kidney disease. CJASN 3(5):1555–1560
CAS
Article
Google Scholar
Stevens LA, Coresh J, Feldman HI, Greene T, Lash JP, Nelson RG et al (2007) Evaluation of the modification of diet in renal disease study equation in a large diverse population. J Am Soc Nephrol 18(10):2749–2757
Article
Google Scholar
Trampisch US, Franke J, Jedamzik N, Hinrichs T, Platen P (2012) Optimal Jamar dynamometer handle position to assess maximal isometric hand grip strength in epidemiological studies. J Hand Surg 37(11):2368–2373
Article
Google Scholar
Linthorne N (2001) Analysis of standing vertical jumps using a force platform. Am J Phys 69(11):1198–1204
Article
Google Scholar
Meyer T, Georg T, Becker C, Kindermann W (2001) Reliability of gas exchange measurements from two different spiroergometry systems. Int J Sports Med 22(8):593–597
CAS
Article
Google Scholar
Tanaka H, Monahan KD, Seals DR (2001) Age-predicted maximal heart rate revisited. J Am Coll Cardiol 37(1):153–156
CAS
Article
Google Scholar
Goodwin M, Harris J, Hernández A, Gladden L (2007) Blood lactate measurements and analysis during exercise: a guide for clinicians. J Diabetes Sci Technol 1(4):558–569
Article
Google Scholar
Edvardsen E, Hem E, Anderssen SA (2014) End criteria for reaching maximal oxygen uptake must be strict and adjusted to sex and age: a cross-sectional study. PLoS One 9(1):e85276
Article
Google Scholar
Fields DA, Goran MI, McCrory MA (2002) Body-composition assessment via air-displacement plethysmography in adults and children: a review. Am J Clin Nutr 75(3):453–467
CAS
Google Scholar
Siri W (1961) Body composition from fluid spaces and density: analysis of methods. In: Brozek J, Henschel A (eds) Techniques for measuring body composition. National Academy of Sciences, Washington, pp 223–244
Google Scholar
Cole TJ, Fewtrell MS, Prentice A (2008) The fallacy of using percentage body fat as a measure of adiposity. Am J Clin Nutr 87(6):1959–1960
CAS
Google Scholar
Weir RR, Carson EL, Mulhern MS, Laird E, Healy M, Pourshahidi LK (2015) Validation of a food frequency questionnaire to determine vitamin D intakes using the method of triads. J Hum Nutr Diet 29(2):255–261
Article
Google Scholar
Spiro A, Buttriss J (2014) Vitamin D: an overview of vitamin D status and intake in Europe. Nutr Bull 39(4):322–350
CAS
Article
Google Scholar
Calvo MS, Whiting SJ, Barton CN (2005) Vitamin D intake: a global perspective of current status. J Nutr 135:310–316
CAS
Google Scholar
Nelson M, Atkinson M, Meyer J (1997) A photographic atlas of food portion sizes. MAFF Publications, London
Google Scholar
Besson H, Brage S, Jakes R, Ekelund U, Wareham N (2010) Estimating physical activity energy expenditure, sedentary time, and physical activity intensity by self-report in adults. Am J Clin Nutr 91(1):106–114
CAS
Article
Google Scholar
Cregg CJ, Kelly D, O’Connor PL, Daly P, Moyna NM (2013) In: Effects of high intensity interval training and high volume endurance training on maximal aerobic capacity, speed and power in club-level Gaelic football players. May 28–June 1; Indianapolis, Indiana. American College of Sports Medicine 60th annual meeting and 4th world congress on exercise is medicine
Moher D, Hopewell S, Schulz KF, Montori V, Gøtzsche PC, Devereaux PJ et al (2010) CONSORT 2010 explanation and elaboration: updated guidelines for reporting parallel group randomised trials. BMJ 340:C869
Article
Google Scholar
Graham JW, Olchowski AE (2007) Gilreath TD (2007) How many imputations are really needed? some practical clarifications of multiple imputation theory. Prev Sci 8:206–213
Article
Google Scholar
Kahan B, Jairath V, Doré C, Morris T (2014) The risks and rewards of covariate adjustment in randomized trials: an assessment of 12 outcomes from 8 studies. Trials 15:139
Article
Google Scholar
Goran M, Fields DA, Hunter GR, Herd SL, Weinsier RL (2000) Total body fat does not influence maximal aerobic capacity. Int J Obes Relat Metab Disord 24(7):841–848
CAS
Article
Google Scholar
Jones RL, Nzekwu MM (2006) The effects of body mass index on lung volumes. Chest 130(3):827–833
Article
Google Scholar
Gormley SE, Swain DP, High R, Spina RJ, Dowling EA, Kotipalli US et al (2008) Effect of intensity of aerobic training on VO2 max. Med Sci Sports Exerc 40(7):1336–1343
Article
Google Scholar
Bruton A, Conway JH, Holgate ST (2000) Reliability: what is it, and how is it measured? Physiotherapy 86(2):94–99
Article
Google Scholar
Tighe J, McManus IC, Dewhurst NG, Chis L, Mucklow J (2010) The standard error of measurement is a more appropriate measure of quality for postgraduate medical assessments than is reliability: an analysis of MRCP(UK) examinations. BMC Med Educ 10(40):1–9
Google Scholar
Laird E, Ward M, McSorley E, Strain JJ, Wallace J (2010) Vitamin D and bone health: potential mechanisms. Nutrients 2(7):693–724
CAS
Article
Google Scholar
Holick MF (2004) Sunlight and vitamin D for bone health and prevention of autoimmune diseases, cancers, and cardiovascular disease. Am J Clin Nutr 80(6S):1678–1688
Google Scholar
Thacher TD, Clarke BL (2011) Vitamin D insufficiency. Mayo Clin Proc 86(1):50–60
CAS
Article
Google Scholar
Storlie DM, Pritchett K, Pritchett R, Cashman C (2011) 12-week vitamin D supplementation trial does not significantly influence seasonal 25(OH)D status in male collegiate athletes. Int J Health Nutr 2(2):8–13
Google Scholar
Close GL, Fraser WD (2012) Vitamin D supplementation for athletes: too much of a good thing? Sport Exerc Sci 33:24–25
Google Scholar
Heaney RP (2011) Assessing vitamin D status. Curr Opin Clin Nutr Metab Care 14(5):440–444
CAS
Article
Google Scholar
Jones G (2008) Pharmacokinetics of vitamin D toxicity. Am J Clin Nutr 88(2):582S–586S
CAS
Google Scholar
Silverberg SJ (2007) Vitamin D deficiency and primary hyperparathyroidism. J Bone Miner Res 22(S2):100–104
Article
Google Scholar
Aadahl M, Kjaer M, Kristensen JH, Mollerup B, Jørgensen T (2007) Self-reported physical activity compared with maximal oxygen uptake in adults. Eur J Cardiovasc Prev Rehabil 14(3):422–428
Article
Google Scholar
Farrell SW, Willis BL, Willis B (2012) Cardiorespiratory fitness, adiposity, and serum 25-dihydroxyvitamin D levels in women: the cooper center longitudinal study. J Womens Health (Larchmt) 21(1):80–86
Article
Google Scholar
Mowry DA, Costello MM, Heelan KA (2009) Association among cardiorespiratory fitness, body fat, and bone marker measurements in healthy young females. J Am Osteopath Assoc 109(10):534–539
Google Scholar
Valtueña J, Gracia-Marco L, Huybrechts I, Breidenassel C, Ferrari M, Gottrand F et al (2013) Cardiorespiratory fitness in males, and upper limbs muscular strength in females, are positively related with 25-hydroxyvitamin D plasma concentrations in European adolescents: the HELENA study. QJM 106(9):809–821
Article
Google Scholar
Jastrzębski Z (2015) Effect of vitamin D supplementation on the level of physical fitness and blood parameters of rowers during the 8-week high intensity training. Facicula Educaţie Fizică şi Sport 2:57–67
Google Scholar
Scholten SD, Sergeev IN, Song Q, Birger CB (2015) Effects of vitamin D and quercetin, alone and in combination, on cardiorespiratory fitness and muscle function in physically active male adults. Open Access J Sports Med 24(6):229–239
Article
Google Scholar
Boxer RS, Kenny AM, Schmotzer BJ, Vest M, Fiutem JJ, Piña IL (2013) A randomized controlled trial of high dose vitamin D3 in patients with heart failure. JACC Heart Fail 1(1):84–90
Article
Google Scholar
Hornikx M, Van Remoortel H, Lehouck A, Mathieu C, Maes K, Gayan-Ramirez G, et al (2012) Vitamin D supplementation during rehabilitation in COPD: a secondary analysis of a randomized trial. Respir Res 13(84):1–9
Google Scholar
Blomqvist CG, Saltin B (1983) Cardiovascular adaptations to physical training. Annu Rev Physiol 45:169–189
CAS
Article
Google Scholar
Girgis CM, Clifton-Bligh RJ, Hamrick MW, Holick MF, Gunton JE (2013) The roles of vitamin D in skeletal muscle: form, function, and metabolism. Endocr Rev 34(1):33–83
CAS
Article
Google Scholar
Close GL, Leckey J, Patterson M, Bradley W, Owens DJ, Fraser WD et al (2013) The effects of vitamin D(3) supplementation on serum total 25[OH]D concentration and physical performance: a randomised dose-response study. Br J Sports Med 47(11):692–696
Article
Google Scholar
Close GL, Russell J, Cobley JN, Owens DJ, Wilson G, Gregson W et al (2013) Assessment of vitamin D concentration in non-supplemented professional athletes and healthy adults during the winter months in the UK: implications for skeletal muscle function. J Sports Sci 31(4):344–353
CAS
Article
Google Scholar
Dubnov-Raz G, Livne N, Raz R, Cohen AH, Constantini NW (2015) Vitamin D Supplementation and physical performance in adolescent swimmers. Int J Sport Nutr Exerc Metab 25(4):317–325
Article
Google Scholar
Bischoff HA, Stähelin HB, Dick W, Akos R, Knecht M, Salis C et al (2003) Effects of vitamin D and calcium supplementation on falls: a randomized controlled trial. J Bone Miner Res 18(2):343–351
CAS
Article
Google Scholar
Pfeifer M, Begerow B, Minne HW, Suppan K, Fahrleitner-Pammer A, Dobnig H (2009) Effects of a long-term vitamin D and calcium supplementation on falls and parameters of muscle function in community-dwelling older individuals. Osteoporos Int 20(2):315–322
CAS
Article
Google Scholar
Houston DK, Tooze JA, Demons JL, Davis BL, Shertzer-Skinner R, Kearsley LB, et al (2015) Delivery of a Vitamin D intervention in homebound older adults using a meals-on-wheels program: a pilot study. J Am Geriatr Soc 63(9):1861–1867
Article
Google Scholar
Black PN, Scragg R (2005) Relationship between serum 25-hydroxyvitamin D and pulmonary function in the third national health and nutrition examination survey. Chest 128(6):3792–3798
CAS
Article
Google Scholar
Li F, Peng M, Jiang L, Sun Q, Zhang K, Lian F et al (2011) Vitamin D deficiency is associated with decreased lung function in Chinese adults with asthma. Respiration 81(6):469–475
CAS
Article
Google Scholar
Jung JY, Kim YS, Kim SK, Kim HY, Oh YM, Lee SM et al (2015) Relationship of vitamin D status with lung function and exercise capacity in COPD. Respirology 20(5):782–789
Article
Google Scholar
Hughes DA, Norton R (2009) Vitamin D and respiratory health. Clin Exp Immunol 158(1):20–25
CAS
Article
Google Scholar