The Effects of a Calcium-Rich Pre-Exercise Meal on Biomarkers of Calcium Homeostasis in Competitive Female Cyclists: A Randomised Crossover Trial
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{"title"=>"The effects of a calcium-rich pre-exercise meal on biomarkers of calcium homeostasis in competitive female cyclists a randomised crossover trial", "type"=>"journal", "authors"=>[{"first_name"=>"Eric C.", "last_name"=>"Haakonssen", "scopus_author_id"=>"55615625300"}, {"first_name"=>"Megan L.", "last_name"=>"Ross", "scopus_author_id"=>"24339258500"}, {"first_name"=>"Emma J.", "last_name"=>"Knight", "scopus_author_id"=>"12788854000"}, {"first_name"=>"Louise E.", "last_name"=>"Cato", "scopus_author_id"=>"56394403000"}, {"first_name"=>"Alisa", "last_name"=>"Nana", "scopus_author_id"=>"54791204900"}, {"first_name"=>"Anita E.", "last_name"=>"Wluka", "scopus_author_id"=>"6701349853"}, {"first_name"=>"Flavia M.", "last_name"=>"Cicuttini", "scopus_author_id"=>"7005887430"}, {"first_name"=>"Bing H.", "last_name"=>"Wang", "scopus_author_id"=>"7405920725"}, {"first_name"=>"David G.", "last_name"=>"Jenkins", "scopus_author_id"=>"7401557589"}, {"first_name"=>"Louise M.", "last_name"=>"Burke", "scopus_author_id"=>"7102048294"}], "year"=>2015, "source"=>"PLoS ONE", "identifiers"=>{"pmid"=>"25970439", "sgr"=>"84929353119", "doi"=>"10.1371/journal.pone.0123302", "scopus"=>"2-s2.0-84929353119", "pui"=>"604377971", "isbn"=>"10.1371/journal.pone.0123302", "issn"=>"19326203"}, "id"=>"568acf79-727f-3a0a-ac7a-5b25849dd207", "abstract"=>"PURPOSE: To examine whether a calcium-rich pre-exercise meal attenuates exercise-induced perturbations of bone calcium homeostasis caused by maintenance of sweat calcium losses.\\n\\nMETHODS: Using a randomized, counterbalanced crossover design, 32 well-trained female cyclists completed two 90 min cycling trials separated by 1 day. Exercise trials were preceded 2 hours by either a calcium-rich (1352 ± 53 mg calcium) dairy based meal (CAL) or a control meal (CON; 46 ± 7 mg calcium). Blood was sampled pre-trial; pre-exercise; and immediately, 40 min, 100 min and 190 min post-exercise. Blood was analysed for ionized calcium and biomarkers of bone resorption (Cross Linked C-Telopeptide of Type I Collagen (CTX-I), Cross Linked C-Telopeptide of Type II Collagen (CTX-II), Parathyroid Hormone (PTH), and bone formation (Procollagen I N-Terminal Propeptide (PINP)) using the established enzyme-linked immunosorbent assay technique.\\n\\nRESULTS: PTH and CTX-I increased from pre-exercise to post-exercise in both conditions but was attenuated in CAL (p < 0.001). PTH was 1.55 [1.20, 2.01] times lower in CAL immediately post-exercise and 1.45 [1.12, 1.88] times lower at 40 min post-exercise. CTX-I was 1.40 [1.15, 1.70] times lower in CAL at immediately post-exercise, 1.30 [1.07, 1.57] times lower at 40 min post-exercise and 1.22 [1.00, 1.48] times lower at 190 min post-exercise (p < 0.05). There was no significant interaction between pre-exercise meal condition and time point for CTX-II (p = 0.732) or PINP (p = 0.819).\\n\\nCONCLUSION: This study showed that a calcium-rich pre-exercise breakfast meal containing ~1350 mg of calcium consumed ~90 min before a prolonged and high intensity bout of stationary cycling attenuates the exercise induced rise in markers of bone resorption - PTH and CTX-I.\\n\\nTRIAL REGISTRATION: Australian New Zealand Clinical Trials Registry ACTRN12614000675628.", "link"=>"http://www.mendeley.com/research/effects-calciumrich-preexercise-meal-biomarkers-calcium-homeostasis-competitive-female-cyclists-rand", "reader_count"=>38, "reader_count_by_academic_status"=>{"Professor > Associate Professor"=>1, "Librarian"=>1, "Student > Doctoral Student"=>5, "Researcher"=>7, "Student > Ph. D. Student"=>4, "Student > Postgraduate"=>3, "Other"=>4, "Student > Master"=>6, "Student > Bachelor"=>4, "Lecturer"=>2, "Professor"=>1}, "reader_count_by_user_role"=>{"Professor > Associate Professor"=>1, "Librarian"=>1, "Student > Doctoral Student"=>5, "Researcher"=>7, "Student > Ph. D. Student"=>4, "Student > Postgraduate"=>3, "Other"=>4, "Student > Master"=>6, "Student > Bachelor"=>4, "Lecturer"=>2, "Professor"=>1}, "reader_count_by_subject_area"=>{"Unspecified"=>2, "Biochemistry, Genetics and Molecular Biology"=>1, "Nursing and Health Professions"=>5, "Agricultural and Biological Sciences"=>7, "Medicine and Dentistry"=>8, "Sports and Recreations"=>13, "Pharmacology, Toxicology and Pharmaceutical Science"=>1, "Psychology"=>1}, "reader_count_by_subdiscipline"=>{"Medicine and Dentistry"=>{"Medicine and Dentistry"=>8}, "Sports and Recreations"=>{"Sports and Recreations"=>13}, "Psychology"=>{"Psychology"=>1}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>7}, "Nursing and Health Professions"=>{"Nursing and Health Professions"=>5}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>1}, "Unspecified"=>{"Unspecified"=>2}, "Pharmacology, Toxicology and Pharmaceutical Science"=>{"Pharmacology, Toxicology and Pharmaceutical Science"=>1}}, "reader_count_by_country"=>{"United States"=>1, "United Kingdom"=>1, "Spain"=>1}, "group_count"=>4}

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/2065761"], "description"=>"<p>Mean ± 95% CI Haematocrit (Hct; A); ionized cacium (iCa: B); and concentrations of <i>parathyroid hormone</i> (PTH: C); <i>cross linked C-telopeptide of type I collagen</i> (CTX-I: D); <i>cross linked C-telopeptide of type II collagen</i> (CTX-II: E); <i>procollagen I N-terminal propeptide</i> (PINP: F); and at each time point for control (CON: open circles) and calcium (CAL: solid squares) trials. Blood samples were taken pre-trial at T = -15 min; pre-exercise at T = 115 min; and post-exercise at all subsequent time points. *Significant difference (p < 0.05) between trial meal conditions at the indicated time point</p>", "links"=>[], "tags"=>["Exercise trials", "cycling attenuates", "bone calcium homeostasis", "bone formation", "90 min cycling trials", "2 hours", "bone resorption", "sweat calcium losses.MethodsUsing", "pth", "control meal", "intensity bout", "Calcium Homeostasis", "Sweat calcium losses", "con", "100 min", "mg", "time point", "1 day", "40 min", "cal", "ACTRN", "bone health", "type II collagen", "Randomised Crossover Trial Cycling", "crossover design", "pinp"], "article_id"=>1413133, "categories"=>["Biological Sciences"], "users"=>["Eric C. Haakonssen", "Megan L. Ross", "Emma J. Knight", "Louise E. Cato", "Alisa Nana", "Anita E. Wluka", "Flavia M. Cicuttini", "Bing H. Wang", "David G. Jenkins", "Louise M. Burke"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0123302.g003", "stats"=>{"downloads"=>2, "page_views"=>13, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Serum_concentrations_of_biomarkers_for_bone_turn_over_calcium_homeostasis_and_haematocrit_before_and_after_control_CON_and_calcium_rich_CAL_meal_conditions_and_exercise_/1413133", "title"=>"Serum concentrations of biomarkers for bone turn over, calcium homeostasis and haematocrit before and after control (CON) and calcium-rich (CAL) meal conditions and exercise.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-05-13 03:04:00"}
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  • {"files"=>["https://ndownloader.figshare.com/files/2065759"], "description"=>"<p>Schematic overview of study design.</p>", "links"=>[], "tags"=>["Exercise trials", "cycling attenuates", "bone calcium homeostasis", "bone formation", "90 min cycling trials", "2 hours", "bone resorption", "sweat calcium losses.MethodsUsing", "pth", "control meal", "intensity bout", "Calcium Homeostasis", "Sweat calcium losses", "con", "100 min", "mg", "time point", "1 day", "40 min", "cal", "ACTRN", "bone health", "type II collagen", "Randomised Crossover Trial Cycling", "crossover design", "pinp"], "article_id"=>1413131, "categories"=>["Biological Sciences"], "users"=>["Eric C. Haakonssen", "Megan L. Ross", "Emma J. Knight", "Louise E. Cato", "Alisa Nana", "Anita E. Wluka", "Flavia M. Cicuttini", "Bing H. Wang", "David G. Jenkins", "Louise M. Burke"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0123302.g002", "stats"=>{"downloads"=>4, "page_views"=>11, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Schematic_overview_of_study_design_/1413131", "title"=>"Schematic overview of study design.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-05-13 03:04:00"}
  • {"files"=>["https://ndownloader.figshare.com/files/2065758"], "description"=>"<p>Flow chart of subject recruitment, group allocation and analysis.</p>", "links"=>[], "tags"=>["Exercise trials", "cycling attenuates", "bone calcium homeostasis", "bone formation", "90 min cycling trials", "2 hours", "bone resorption", "sweat calcium losses.MethodsUsing", "pth", "control meal", "intensity bout", "Calcium Homeostasis", "Sweat calcium losses", "con", "100 min", "mg", "time point", "1 day", "40 min", "cal", "ACTRN", "bone health", "type II collagen", "Randomised Crossover Trial Cycling", "crossover design", "pinp"], "article_id"=>1413130, "categories"=>["Biological Sciences"], "users"=>["Eric C. Haakonssen", "Megan L. Ross", "Emma J. Knight", "Louise E. Cato", "Alisa Nana", "Anita E. Wluka", "Flavia M. Cicuttini", "Bing H. Wang", "David G. Jenkins", "Louise M. Burke"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0123302.g001", "stats"=>{"downloads"=>3, "page_views"=>8, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Flow_chart_of_subject_recruitment_group_allocation_and_analysis_/1413130", "title"=>"Flow chart of subject recruitment, group allocation and analysis.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-05-13 03:04:00"}
  • {"files"=>["https://ndownloader.figshare.com/files/2065763", "https://ndownloader.figshare.com/files/2065764", "https://ndownloader.figshare.com/files/2065765", "https://ndownloader.figshare.com/files/2065766", "https://ndownloader.figshare.com/files/2065767", "https://ndownloader.figshare.com/files/2065768", "https://ndownloader.figshare.com/files/2065769"], "description"=>"<div><p>Cycling is recognised as a sport in which there is a high incidence of poor bone health. Sweat calcium losses may contribute to this.</p><p>Purpose</p><p>To examine whether a calcium-rich pre-exercise meal attenuates exercise-induced perturbations of bone calcium homeostasis caused by maintenance of sweat calcium losses.</p><p>Methods</p><p>Using a randomized, counterbalanced crossover design, 32 well-trained female cyclists completed two 90 min cycling trials separated by 1 day. Exercise trials were preceded 2 hours by either a calcium-rich (1352 ± 53 mg calcium) dairy based meal (CAL) or a control meal (CON; 46 ± 7 mg calcium). Blood was sampled pre-trial; pre-exercise; and immediately, 40 min, 100 min and 190 min post-exercise. Blood was analysed for ionized calcium and biomarkers of bone resorption (Cross Linked C-Telopeptide of Type I Collagen (CTX-I), Cross Linked C-Telopeptide of Type II Collagen (CTX-II), Parathyroid Hormone (PTH), and bone formation (Procollagen I N-Terminal Propeptide (PINP)) using the established enzyme-linked immunosorbent assay technique.</p><p>Results</p><p>PTH and CTX-I increased from pre-exercise to post-exercise in both conditions but was attenuated in CAL (p < 0.001). PTH was 1.55 [1.20, 2.01] times lower in CAL immediately post-exercise and 1.45 [1.12, 1.88] times lower at 40 min post-exercise. CTX-I was 1.40 [1.15, 1.70] times lower in CAL at immediately post-exercise, 1.30 [1.07, 1.57] times lower at 40 min post-exercise and 1.22 [1.00, 1.48] times lower at 190 min post-exercise (p < 0.05). There was no significant interaction between pre-exercise meal condition and time point for CTX-II (p = 0.732) or PINP (p = 0.819).</p><p>Conclusion</p><p>This study showed that a calcium-rich pre-exercise breakfast meal containing ~1350 mg of calcium consumed ~90 min before a prolonged and high intensity bout of stationary cycling attenuates the exercise induced rise in markers of bone resorption – PTH and CTX-I.</p><p>Trial Registration</p><p>Australian New Zealand Clinical Trials Registry <a href=\"https://www.anzctr.org.au/Trial/Registration/TrialReview.aspx?id=366558\" target=\"_blank\">ACTRN12614000675628</a></p></div>", "links"=>[], "tags"=>["Exercise trials", "cycling attenuates", "bone calcium homeostasis", "bone formation", "90 min cycling trials", "2 hours", "bone resorption", "sweat calcium losses.MethodsUsing", "pth", "control meal", "intensity bout", "Calcium Homeostasis", "Sweat calcium losses", "con", "100 min", "mg", "time point", "1 day", "40 min", "cal", "ACTRN", "bone health", "type II collagen", "Randomised Crossover Trial Cycling", "crossover design", "pinp"], "article_id"=>1413135, "categories"=>["Biological Sciences"], "users"=>["Eric C. Haakonssen", "Megan L. Ross", "Emma J. Knight", "Louise E. Cato", "Alisa Nana", "Anita E. Wluka", "Flavia M. Cicuttini", "Bing H. Wang", "David G. Jenkins", "Louise M. Burke"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0123302.s001", "https://dx.doi.org/10.1371/journal.pone.0123302.s002", "https://dx.doi.org/10.1371/journal.pone.0123302.s003", "https://dx.doi.org/10.1371/journal.pone.0123302.s004", "https://dx.doi.org/10.1371/journal.pone.0123302.s005", "https://dx.doi.org/10.1371/journal.pone.0123302.s006", "https://dx.doi.org/10.1371/journal.pone.0123302.s007"], "stats"=>{"downloads"=>10, "page_views"=>11, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_The_Effects_of_a_Calcium_Rich_Pre_Exercise_Meal_on_Biomarkers_of_Calcium_Homeostasis_in_Competitive_Female_Cyclists_A_Randomised_Crossover_Trial_/1413135", "title"=>"The Effects of a Calcium-Rich Pre-Exercise Meal on Biomarkers of Calcium Homeostasis in Competitive Female Cyclists: A Randomised Crossover Trial", "pos_in_sequence"=>0, "defined_type"=>4, "published_date"=>"2015-05-13 03:04:00"}

PMC Usage Stats | Further Information

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Relative Metric

{"start_date"=>"2015-01-01T00:00:00Z", "end_date"=>"2015-12-31T00:00:00Z", "subject_areas"=>[]}
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