PKo7$ &  refs.MYD? Hopkins, W G2007vBetaine, hyperventilation, hyperimmune egg protein and other novelties for performance at the 2007 ACSM annual meeting1-8 Sportscience11:elite athletes, ergogenic aids, nutrition, tests, trainingPreamble: no problems in New Orleans, in praise of posters but not genomics, sample sizes, statistical errors, accessing the PDFs. Acute Strategies: hyperventilation, a long-john swimsuit, warm-ups, stretching, vibration, diving at first base, continuous ultrasound, a recovery cocktail. Biostatistics: bias in Bland-Altman, caution with meta-analyses. Nutrition: betaine, protein, more protein, even more protein, hyperimmune egg protein, echinacea, a high-sodium drink, caffeine, HMB, beta-alanine, quercetin, anti-oxidants, trehalose, sodium bicarbonate, DHEA. Tests and Technology: hemoglobin mass, a running sensor, GPS, DEXA, modeling power-meter data, critical power. Training: muscle soreness, overtraining, inspiratory muscle training, vibration, forced repetitions, weight-training for endurance. Reviewer's Comment: posters, mechanisms, performance measures, individual differences, training studies. $http://sportsci.org/2007/wghACSM.htmZSport and Recreation, AUT University, Auckland 0627, New Zealand. Email: will@clear.net.nz$? Hopkins, W G2007?The Tour de Journals 2007: impact factors in exercise and sport9-11 Sportscience11)academic, citation, publication, researchA journal's impact factor is the recent average annual rate of citation of its recent articles. This year’s medal winners specializing in the disciplines of exercise and sports medicine and science are all review-only journals: Sports Medicine (impact factor, 3.5), Exercise and Sport Sciences Reviews (3.0), and Exercise and Immunology Reviews (2.9). The remaining journals in the top 10 feature original-research articles: Medicine and Science in Sports and Exercise (2.9), American Journal of Sports Medicine (2.7), Journal of Biomechanics (2.5), British Journal of Sports Medicine (2.2), Scandinavian Journal of Medicine & Science in Sports (2.0), Journal of Sports Sciences (1.8), and Clinical Journal of Sport Medicine (1.7). Noteworthy performers with impact factors of at least 1.0 include Journal of Sport and Exercise Psychology (1.5), Psychology of Sport and Exercise (1.4), Journal of Strength and Conditioning Research (1.3), International Journal of Sports Medicine (1.2), Journal of Science and Medicine in Sport (1.2), International Journal of Sport Nutrition and Exercise Metabolism (1.0), and Research Quarterly for Exercise and Sport (1.0). A special prize for infinite percent improvement goes to Journal of Sports Science and Medicine (0.6)."http://sportsci.org/2007/wghif.htmZSport and Recreation, AUT University, Auckland 0627, New Zealand. Email: will@clear.net.nz? Hopkins, W G2007Editorial: blogs and podcasts21 Sportscience11)http://sportsci.org/2007/inbrief.htm#editZSport and Recreation, AUT University, Auckland 0627, New Zealand. Email: will@clear.net.nz? Atkinson, G A2007RWhat’s behind the numbers? Important decisions in judging practical significance12-15 Sportscience11cconfidence intervals, null hypothesis, Type I and II statistical errors, smallest worthwhile effect3In an applied field like sport and exercise science, inferences based on estimation of true effect sizes are usually more important than inferences about statistical significance. Inferences about estimation are conventionally made using confidence intervals, which are associated with several critical judgments. The most important decision concerns the smallest effect size that is practically or clinically important. A recently published new approach to sample size estimation also raises issues of judging the appropriate coverage probability of a confidence interval (e.g. 90 or 95%) as well as the degree of overlap between confidence limits and the smallest worthwhile effect. It is these a priori rationalized decisions that underpin the mathematics of confidence intervals, the probabilistic inferences made from them and associated issues like sample size estimation and claims that a statistical approach is too conservative or liberal. First, I discuss that the “null” in the null hypothesis testing process does not always need to be set at zero. If the smallest worthwhile effect itself is selected as the null value, then this process not so isolated from practical significance. Second, I contrast ideas on boundaries of overlap between confidence limits and the smallest worthwhile effect with other published guidelines on using confidence intervals to interpret study results. It is these differences in delimited probability coverage that govern the apparently lower sample sizes required for the new approach. Third, I illustrate how critical the decision on smallest worthwhile effect size can be for accuracy of study conclusions, and question whether uncertainty in this decision process might, in some instances, compromise the accuracy of the inferential statements that are made following statistical analysis. http://sportsci.org/2007/ga.htmResearch Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool L3 2ET, UK. Email: G.Atkinson@livjm.ac.uk? Hopkins, W G2007mA spreadsheet for deriving a confidence interval, mechanistic inference and clinical inference from a p value16-20 Sportscience11jclinical decision, confidence limits, null-hypothesis test, practical importance, statistical significance#http://sportsci.org/2007/wghinf.htmZSport and Recreation, AUT University, Auckland 0627, New Zealand. Email: will@clear.net.nz? Shrier, I2007Tutorials on R stats21-22 Sportscience11+http://sportsci.org/2007/inbrief.htm#RstatskDepartment of Family Medicine, McGill University, Montreal, Quebec H3T 1E2. Email: ian.shrier=AT=mcgill.ca? Hopkins, W G2007,A spreadsheet to compare means in two groups22-23 Sportscience11)http://sportsci.org/2007/inbrief.htm#xcl2ZSport and Recreation, AUT University, Auckland 0627, New Zealand. Email: will@clear.net.nz`? Hopkins, W G2007 Update: finding out what's known22 Sportscience11/http://sportsci.org/2007/inbrief.htm#FindingOutZSport and Recreation, AUT University, Auckland 0627, New Zealand. Email: ? Hopkins, W G2007Update: sample size22 Sportscience11/http://sportsci.org/2007/inbrief.htm#SampleSizeZSport and Recreation, AUT University, Auckland 0627, New Zealand. Email: will@clear.net.nzwill@clear.net.nz| ? Hopkins, W G2007NUnderstanding statistics by using spreadsheets to generate and analyze samples23-36 Sportscience11fconfidence limits, data analysis, probability distribution, random number, research design, simulation%http://sportsci.org/2007/wghstats.htmZSport and Recreation, AUT University, Auckland 0627, New Zealand. Email: will@clear.net.nz? Seiler, S2007*Commentary on the 2007 ACSM Annual Meeting37 Sportscience11http://sportsci.org/2007/ss.htmqAgder University College, Faculty of Health and Sport, Kristiansand 4604, Norway. Email: stephen.seiler=AT=hia.noPKP 7I/**refs.FRM 0B< !// !HPRIMARYyearIndex 6ByP/) idreference_type text_stylesauthoryear title pages secondary_title volume numbernumber_of_volumessecondary_authorplace_published publishersubsidiary_authoredition keywords type_of_workdate2)  abstractlabelurltertiary_titletertiary_author notes isbn custom_1 custom_2 custom_3 custom_4alternate_titleaccession_number call_number short_title custom_5 custom_6sectionoriginal_publicationH) reprint_editionreviewed_itemauthor_addressimagecaption custom_7 electronic_resource_number link_to_pdf translated_author translated_titlename_of_databasedatabase_providerresearch_notes language access_datelast_modified_date !! H!H!H! (H! 3H! >H! IH! TH!_H!jH!uH! H!H!H! H! H!H! H!H!H!H!H! H! H! H! H! %H! 0H!;H!FH! QH! \H! gH! rH!}H!H!H!H!H!H!H! H! H! H! H! H!H! H!H! 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