Fueling for Performance

Context: Proper nutrition is crucial for an athlete to optimize his or her performance for training and competition. Athletes should be able to meet their dietary needs through eating a wide variety of whole food sources. Evidence Acquisition: PubMed was searched for relevant articles published from 1980 to 2016. Study Design: Clinical review. Level of Evidence: Level 4. Results: An athlete should have both daily and activity-specific goals for obtaining the fuel necessary for successful training. Depending on the timing of their season, athletes may be either trying to gain lean muscle mass, lose fat, or maintain their current weight. Conclusion: An athlete will have different macronutrient goals depending on sport, timing of exercise, and season status. There are no specific athletic micronutrient guidelines, but testing should be considered for athletes with deficiency or injury. Also, some athletes who eliminate certain whole food groups (eg, vegetarian) may need to supplement their diet to avoid deficiencies.

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Muscle Atrophy After ACL Injury: Implications for Clinical Practice

Sports Health A Multidisciplinary Approach ◽

10.1177/1941738120944256 ◽

2020 ◽

Vol 12 (6) ◽

pp. 579-586

Author(s):

Lindsey K. Lepley ◽

Steven M. Davi ◽

Julie P. Burland ◽

Adam S. Lepley

Keyword(s):

Clinical Review ◽

Muscle Mass ◽

Muscle Atrophy ◽

Cruciate Ligament ◽

Muscle Loss ◽

Disuse Atrophy ◽

Tissue Quality ◽

Level Of Evidence ◽

Joint Injury ◽

Inducing Factors

Context: Distinct from the muscle atrophy that develops from inactivity or disuse, atrophy that occurs after traumatic joint injury continues despite the patient being actively engaged in exercise. Recognizing the multitude of factors and cascade of events that are present and negatively influence the regulation of muscle mass after traumatic joint injury will likely enable clinicians to design more effective treatment strategies. To provide sports medicine practitioners with the best strategies to optimize muscle mass, the purpose of this clinical review is to discuss the predominant mechanisms that control muscle atrophy for disuse and posttraumatic scenarios, and to highlight how they differ. Evidence Acquisition: Articles that reported on disuse atrophy and muscle atrophy after traumatic joint injury were collected from peer-reviewed sources available on PubMed (2000 through December 2019). Search terms included the following: disuse muscle atrophy OR disuse muscle mass OR anterior cruciate ligament OR ACL AND mechanism OR muscle loss OR atrophy OR neurological disruption OR rehabilitation OR exercise. Study Design: Clinical review. Level of Evidence: Level 5. Results: We highlight that (1) muscle atrophy after traumatic joint injury is due to a broad range of atrophy-inducing factors that are resistant to standard resistance exercises and need to be effectively targeted with treatments and (2) neurological disruptions after traumatic joint injury uncouple the nervous system from muscle tissue, contributing to a more complex manifestation of muscle loss as well as degraded tissue quality. Conclusion: Atrophy occurring after traumatic joint injury is distinctly different from the muscle atrophy that develops from disuse and is likely due to the broad range of atrophy-inducing factors that are present after injury. Clinicians must challenge the standard prescriptive approach to combating muscle atrophy from simply prescribing physical activity to targeting the neurophysiological origins of muscle atrophy after traumatic joint injury.

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Contribution of food groups to energy, grams and nutrients-to-limit: The Latin American Study of Nutrition and Health/Estudio Latino Americano de Nutrición y Salud (ELANS)

Public Health Nutrition ◽

10.1017/s136898002100152x ◽

2021 ◽

pp. 1-34

Author(s):

Regina Mara Fisberg ◽

Ana Carolina Barco Leme ◽

Ágatha Nogueira Previdelli ◽

Aline Veroneze de Mello ◽

Angela Martinez Arroyo ◽

...

Keyword(s):

Latin American ◽

Saturated Fatty Acids ◽

Food Sources ◽

American Study ◽

Food Groups ◽

Latin American Study ◽

Nutrition And Health ◽

Cross Sectional ◽

Added Sugars ◽

Latin Americans

ABSTRACT Objective: To quantify the energy, nutrients-to-limit and total gram amount consumed, and identify their top food sources consumed by Latin Americans. Design: Data from The Latin American Study of Nutrition and Health (ELANS). Setting: ELANS is a cross-sectional study representative of eight Latin American countries: Argentina, Brazil, Chile, Colombia, Costa Rica, Ecuador, Peru, and Venezuela. Participants: Two 24h dietary recalls on non-consecutive days were used to estimate usual dietary intake of 9218 participants with ages between 15-65years. “What We Eat in America” food classification system developed by USDA was adapted and used to classify all food items consumed by the ELANS population. Food sources of energy, added sugars, saturated fatty acids (SFA), sodium and total gram amount consumed were identified and ranked based on percentage contribution to intake of total amount. Results: Three-highest ranked food categories of total energy consumed were: rice (10.3%), yeast breads (6.9%), and turnovers and other grain-based items (6.8%). Highest ranked food sources of total gram amount consumed were: fruit drinks (9.6%), other 100% juice (9.3%), and rice (8.3%). Three highest ranked sources for added sugars were: other 100% juice (24.1%), fruit drinks (16.5%), and sugar and honey (12.4%). SFA ranked foods were: turnovers and other grain-based (12.6%), cheese (11.9%), and pizza (10.3%). Three top sources of sodium were: rice (13.9%), soups (9.1%), and rice mixed dishes (7.3%). Conclusion: Identification of top sources of energy and nutrients-to-limit among Latin Americans is critical for designing strategies to help them meet nutrient recommendations within energy needs.

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Stroke and food groups: an overview of systematic reviews and meta-analyses

Public Health Nutrition ◽

10.1017/s1368980017003093 ◽

2017 ◽

Vol 21 (4) ◽

pp. 766-776 ◽

Cited By ~ 9

Author(s):

Cuiyu Deng ◽

Qi Lu ◽

Bingyan Gong ◽

Liya Li ◽

Lianxia Chang ◽

...

Keyword(s):

Systematic Reviews ◽

Prospective Studies ◽

Stroke Risk ◽

Cochrane Library ◽

Processed Meat ◽

Stroke Outcome ◽

Food Groups ◽

Level Of Evidence ◽

High Consumption ◽

Meta Analyses

AbstractObjectiveNumerous systematic reviews of prospective studies on the association of stroke risk with the consumption of various food groups have been published. A review of the evidence across the existing systematic reviews and meta-analyses of prospective studies was conducted to provide an overview of the range and validity of the reported associations of food groups with stroke risk.DesignThe PubMed, EMBASE and Cochrane Library databases were searched for articles published up to September 2015 to identify systematic reviews of prospective studies.ResultsA total of eighteen studies published from 2008 to 2015 were eligible for analysis. Overall, thirteen specific foods were studied for an association with stroke outcome, including nuts, legumes, fruits and vegetables, refined grains, whole grains, dairy products, eggs, chocolate, red and/or processed meat, fish, tea, sugar-sweetened beverages and coffee. Whereas a high consumption of nuts, fruits, vegetables, dairy foods, fish and tea, and moderate consumption of coffee and chocolate demonstrated a protective effect, a high consumption of red and/or processed meat was associated with increased stroke risk. Refined grain, sugar-sweetened beverage, legume, egg and whole grain intake showed no effect on stroke outcome.ConclusionsThe current overview provided a high level of evidence to support the beneficial effect of specific foods on stroke outcome. Clinicians and policy makers could inform clinical practice and policy based on this overview.

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Musculoskeletal profile of amateur combat athletes: body composition, muscular strength and striking power

Movement & Sport Sciences - Science & Motricité ◽

10.1051/sm/2021004 ◽

2021 ◽

Author(s):

Luke Del Vecchio ◽

Nattai Borges ◽

Campbell MacGregor ◽

Jarrod D. Meerkin ◽

Mike Climstein

Keyword(s):

Bone Mineral Density ◽

Body Composition ◽

Lumbar Spine ◽

Muscle Mass ◽

Bone Mineral ◽

Lower Limb ◽

Mineral Density ◽

Lean Muscle Mass ◽

Total Body ◽

Physiological Tests

Background: Previous research highlighted positive musculoskeletal adaptations resulting from mechanical forces and loadings distinctive to impacts and movements with sports participation. However, little is known about these adaptations in combat athletes. The aim of this study was to quantify bone mineral density, lean muscle mass and punching and kicking power in amateur male combat athletes. Methods: Thirteen male combat athletes (lightweight and middleweight) volunteered all physiological tests including dual energy X-ray absorptiometry for bone mineral density (BMD) segmental body composition (lean muscle mass, LMM), muscle strength and striking power, sedentary controls (n = 15) were used for selected DXA outcome variables. Results: There were significant differences (p < 0.05) between combat groups for lumbar spine (+5.0%), dominant arm (+4.4%) BMD, and dominant and non-dominant leg LMM (+21.8% and +22.6%). Controls had significantly (p < 0.05) high adiposity (+36.8% relative), visceral adipose tissue (VAT) mass (+69.7%), VAT area (+69.5%), lower total body BMD (−8.4%) and lumbar spine BMD (−13.8%) than controls. No differences in lower limb BMD were seen in combat groups. Arm lean mass differences (dominant versus non-dominant) were significantly different between combat groups (p < 0.05, 4.2% versus 7.3%). There were no differences in punch/kick power (absolute or relative) between combat groups. 5RM strength (bench and squat) correlated significantly with upper limb striking power (r = 0.57), dominant and non-dominant leg BMD (r = 0.67, r = 0.70, respectively) and total body BMD (r = 0.59). Conclusion: BMD and LMM appear to be particularly important to discriminate between dominant and non-dominant upper limbs and less so for lower limb dominance in recreational combat athletes.

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Dietary Cadmium Intake and Sources in the US

Nutrients ◽

10.3390/nu11010002 ◽

2018 ◽

Vol 11 (1) ◽

pp. 2 ◽

Cited By ~ 27

Author(s):

Kijoon Kim ◽

Melissa Melough ◽

Terrence Vance ◽

Hwayoung Noh ◽

Sung Koo ◽

...

Keyword(s):

Body Weight ◽

Primary Source ◽

Leafy Vegetables ◽

Food Sources ◽

Food Groups ◽

Toxic Heavy Metal ◽

Tolerable Weekly Intake ◽

The Us ◽

Dietary Cadmium ◽

Cd Exposure

Cadmium (Cd) is a toxic heavy metal that can contribute to numerous diseases as well as increased mortality. Diet is the primary source of Cd exposure for most individuals, yet little is known about the foods and food groups that contribute most substantially to dietary Cd intake in the US. Therefore, the objective of this study was to estimate dietary Cd intake and identify major food sources of Cd in the US population and among subgroups of the population. Individuals aged 2 years and older from the National Health and Nutrition Examination Survey (NHANES) 2007–2012 were included in this study (n = 12,523). Cd intakes were estimated from two days of 24-h dietary recalls by matching intake data with the Cd database of the Food and Drug Administration (FDA)’s Total Diet Study 2006 through 2013. The average dietary Cd consumption in the population was 4.63 μg/day, or 0.54 μg/kg body weight/week, which is 22% of the tolerable weekly intake (TWI) of 2.5 μg/kg body weight/week. Greater daily Cd intakes were observed in older adults, males, those with higher income, higher education, or higher body mass index. The highest Cd intakes on a body weight basis were observed in children 10 years and younger (38% of TWI), underweight individuals (38% of TWI), and alcohol non-consumers (24% of TWI). The food groups that contributed most to Cd intake were cereals and bread (34%), leafy vegetables (20%), potatoes (11%), legumes and nuts (7%), and stem/root vegetables (6%). The foods that contributed most to total Cd intake were lettuce (14%), spaghetti (8%), bread (7%), and potatoes (6%). Lettuce was the major Cd source for Caucasians and Blacks, whereas tortillas were the top source for Hispanics, and rice was the top contributor among other ethnic subgroups including Asians. This study provides important information on the dietary Cd exposure of Americans, and identifies the groups with the greatest dietary Cd exposure as well as the major sources of dietary Cd among sociodemographic subgroups.

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Return to Sport After Ankle Syndesmotic Injury: A Systematic Review

Sports Health A Multidisciplinary Approach ◽

10.1177/1941738118816282 ◽

2018 ◽

Vol 11 (2) ◽

pp. 116-122 ◽

Cited By ~ 1

Author(s):

Seline Y. Vancolen ◽

Ibrahim Nadeem ◽

Nolan S. Horner ◽

Herman Johal ◽

Bashar Alolabi ◽

...

Keyword(s):

Systematic Review ◽

Study Design ◽

Return To Sport ◽

Nonoperative Treatment ◽

High Rate ◽

Rate Of Return ◽

Syndesmotic Injury ◽

Level Of Evidence ◽

Treatment Groups ◽

Pertinent Data

Context: Ankle syndesmotic injuries present a significant challenge for athletes due to prolonged disability and recovery periods. The optimal management of these injuries and rates of return to sport in athletes remains unclear. Objective: The purpose of this study was to evaluate return to sport for athletes after ankle syndesmotic injuries. Data Source: The electronic databases MEDLINE, EMBASE, and PubMed were searched for relevant studies from database inception to January 15, 2017, and pertinent data were abstracted. Study Selection: Only studies reporting return-to-sport rates after ankle syndesmotic injuries were included. Study Design: Systematic review. Level of Evidence: Level 4. Data Extraction: Two reviewers extracted data from the included studies, which were stored in a standardized collection form (Microsoft Excel). Recorded data included demographics (eg, author, year of publication, study design), descriptive statistics (eg, patient age, percentage male, number of athletes, sample size), and outcomes (eg, time to return to sport, proportion of those who returned to sport, the self-reported questionnaire the Olerud-Molander Ankle Score). Results: A total of 10 studies and 312 patients with ankle syndesmotic injuries were included in this systematic review. The rate of return to preinjury or any injury level of sport after ankle syndesmotic injuries was 93.8% ± 1.2% and 97.6% ± 1.5%, respectively, for the corresponding 7 and 3 studies that reported this characteristic. The mean time to return to sport was 46.4 days (range, 15.4-70 days), with 55.2 ± 15.8 and 41.7 ± 9.8 days for operative and nonoperative management, respectively. Conclusion: This systematic review found a high rate of return to any as well as preinjury level of sport after ankle syndesmotic injury in both operative and nonoperative treatment groups. However, further high-level studies are required to compare operative and nonoperative treatment groups associated with return to sport after ankle syndesmotic injury.

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Foods contributing to sodium intake and urinary sodium excretion in a group of Australian women

Public Health Nutrition ◽

10.1017/s1368980012004016 ◽

2012 ◽

Vol 16 (10) ◽

pp. 1837-1842 ◽

Cited By ~ 9

Author(s):

Jennifer B Keogh ◽

Kylie Lange ◽

Rebecca Hogarth ◽

Peter M Clifton

Keyword(s):

Sodium Intake ◽

Meat Products ◽

South Australia ◽

Community Setting ◽

Urinary Sodium Excretion ◽

Community Dwelling ◽

Food Sources ◽

Food Groups ◽

Creatinine Excretion ◽

Food Records

AbstractObjectivesTo identify food sources of Na in a group of community-dwelling women in Adelaide, South Australia. A secondary aim was to measure Na excretion in this group.DesignSurvey.SettingCommunity setting, Adelaide, South Australia.SubjectsSeventy healthy women (mean age 48·6 (sd8·1) years, mean BMI 28·6 (sd6·3) kg/m2) living in metropolitan Adelaide, South Australia and participating in a validation study of an FFQ. Dietary intake was derived from two 4 d weighed food records. Foods from the 4 d weighed food records were grouped according to foods or food groups to establish contributors to Na intake. Na excretion was measured in two 24 h urine samples. Completeness of urine collections was verified using creatinine excretion.ResultsBread alone contributed 19·0 % of Na intake, with an overall contribution from the breads and cereals group of 32·5 %. Meat products contributed 14·4 % of intake, the dairy and eggs group (excluding cheese) 9·6 % and combination dishes (e.g. pizza, quiche, sandwiches and stir fry dishes) 8·4 %. Na excretion was 126 (sd42) mmol/d, i.e. approximately 7·6 (sd2.5) g salt/d. Seventy per cent of participants (n48) had Na excretion ≥100 mmol/d (146 (sd34) mmol/d).ConclusionsEffective Na reduction could be achieved by reducing the amount in staple foods such as bread and meat products.

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Abstract P228: Abdominal Lean Muscle Mass is Associated with the Density, but Not the Volume, of Coronary Arterial Calcium and Abdominal Aortic Calcium

Circulation ◽

10.1161/circ.133.suppl_1.p228 ◽

2016 ◽

Vol 133 (suppl_1) ◽

Author(s):

Margaret A Crawford ◽

Matthew A Allison ◽

Michael H Criqui ◽

Britta A Larsen

Keyword(s):

Risk Factors ◽

Muscle Mass ◽

Abdominal Muscle ◽

Inverse Association ◽

Linear Regression Models ◽

Cvd Risk Factors ◽

Cvd Risk ◽

Lean Muscle Mass ◽

Abdominal Aortic ◽

Liver And Kidney

Introduction: Higher volume of coronary arterial calcium (CAC) and abdominal aortic calcium (AAC) are predictive of incident CVD, while higher density of CAC and AAC are associated with lower risk. The purpose of the present study was to determine the associations of abdominal lean muscle mass (ALMM) with CAC volume, CAC density, AAC volume, and AAC density. Hypothesis: We hypothesized that abdominal muscle mass would be negatively associated with CAC and AAC volume but positively associated with CAC and AAC density. Methods: The current study analyzed data from the Multi-Ethnic Study of Atherosclerosis (MESA) in those participants who underwent abdominal computed tomography (CT) to assess for AAC, which was also analyzed for volumes of fat (visceral and subcutaneous) and ALMM (psoas, rectus abdominis, obliques, and paraspinus). CAC and AAC were scored separately, for density and for volume. Results: Analyses were restricted to participants who had non-zero CAC or AAC volumes. The sample sizes for the CAC analyses and AAC analyses were 963 and 1283 subjects, respectively. For the CAC analyses, 39.4% (379 of 963) were female and the mean age was 66.4 years. Mean ± SD CAC volume was 218.52 ± 344.19 (range 2.34- 3244.77 mm 3 ) ; Mean ± SD CAC density was 2.70 ± .72 (range 0.83- 4.0 Hu category units). Mean ± SD AAC volume was 1402.33 ± 1888 (range 4.68- 15822.2 mm 3 ); mean ± SD AAC density was 3.02 ± .63 (range 0.83- 4.0 Hu category units). In multivariable linear regression models that controlled for age, race, gender, CVD risk factors, visceral fat, and liver and kidney markers, both CAC and AAC density were found to be significantly associated with abdominal lean muscle mass. For every 100 cm 2 increase of ALMM, CAC density decreased by .35 Hu category units (p < .05). For every 100 cm 2 increase of ALMM, AAC density decreased by .26 Hu category units (p < .05). Conversely, CAC and AAC volume were not significantly associated with abdominal lean muscle mass in final models. Conclusion: Higher levels of ALMM were associated with lower CAC and AAC density, but not volume. Contrary to expectation, we found an inverse association of ALMM with CAC and AAC density, independent of relevant CVD risk factors.

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11βHSD1 Inhibition with AZD4017 Improves Lipid Profiles and Lean Muscle Mass in Idiopathic Intracranial Hypertension

The Journal of Clinical Endocrinology & Metabolism ◽

10.1210/clinem/dgaa766 ◽

2020 ◽

Vol 106 (1) ◽

pp. 174-187

Author(s):

Rowan S Hardy ◽

Hannah Botfield ◽

Keira Markey ◽

James L Mitchell ◽

Zerin Alimajstorovic ◽

...

Keyword(s):

Intracranial Hypertension ◽

Muscle Mass ◽

Idiopathic Intracranial Hypertension ◽

Hepatic Function ◽

Lipid Profiles ◽

Gamma Glutamyl Transferase ◽

Peripheral Tissues ◽

Lean Muscle Mass ◽

Glutamyl Transferase ◽

The Impact

Abstract Background The enzyme 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1) determines prereceptor metabolism and activation of glucocorticoids within peripheral tissues. Its dysregulation has been implicated in a wide array of metabolic diseases, leading to the development of selective 11β-HSD1 inhibitors. We examined the impact of the reversible competitive 11β-HSD1 inhibitor, AZD4017, on the metabolic profile in an overweight female cohort with idiopathic intracranial hypertension (IIH). Methods We conducted a UK multicenter phase II randomized, double-blind, placebo-controlled trial of 12-week treatment with AZD4017. Serum markers of glucose homeostasis, lipid metabolism, renal and hepatic function, inflammation and androgen profiles were determined and examined in relation to changes in fat and lean mass by dual-energy X-ray absorptiometry. Results Patients receiving AZD4017 showed significant improvements in lipid profiles (decreased cholesterol, increased high-density lipoprotein [HDL] and cholesterol/HDL ratio), markers of hepatic function (decreased alkaline phosphatase and gamma-glutamyl transferase), and increased lean muscle mass (1.8%, P < .001). No changes in body mass index, fat mass, and markers of glucose metabolism or inflammation were observed. Patients receiving AZD4017 demonstrated increased levels of circulating androgens, positively correlated with changes in total lean muscle mass. Conclusions These beneficial metabolic changes represent a reduction in risk factors associated with raised intracranial pressure and represent further beneficial therapeutic outcomes of 11β-HSD1 inhibition by AZD4017 in this overweight IIH cohort. In particular, beneficial changes in lean muscle mass associated with AZD4017 may reflect new applications for this nature of inhibitor in the management of conditions such as sarcopenia.

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Dietary Protein Intake and Determinants in Māori and Non-Māori Octogenarians. Te Puāwaitanga o Ngā Tapuwae Kia Ora Tonu: Life and Living in Advanced Age: A Cohort Study in New Zealand

Nutrients ◽

10.3390/nu12072079 ◽

2020 ◽

Vol 12 (7) ◽

pp. 2079

Author(s):

Anishka Ram ◽

Ngaire Kerse ◽

Simon A. Moyes ◽

Marama Muru-Lanning ◽

Carol Wham

Keyword(s):

Dietary Protein ◽

Protein Intake ◽

Logistic Regression Model ◽

Food Group ◽

Advanced Age ◽

Food Sources ◽

Food Groups ◽

Protein Distribution ◽

Low Protein ◽

Age Related

Protein intake, food sources and distribution are important in preventing age-related loss of muscle mass and strength. The prevalence and determinants of low protein intake, food sources and mealtime distribution were examined in 214 Māori and 360 non-Māori of advanced age using two 24 h multiple pass recalls. The contribution of food groups to protein intake was assessed. Low protein intake was defined as ≤0.75 g/kg for women and ≤0.86 g/kg for men. A logistic regression model was built to explore predictors of low protein intake. A third of both women (30.9%) and men (33.3%) had a low protein intake. The main food group sources were beef/veal, fish/seafood, milk, bread though they differed by gender and ethnicity. For women and men respectively protein intake (g/meal) was lowest at breakfast (10.1 and 13.0), followed by lunch (14.5 and 17.8) and dinner (23.3 and 34.2). Being a woman (p = 0.003) and having depressive symptoms (p = 0.029) were associated with consuming less protein. In adjusted models the odds of adequate protein intake were higher in participants with their own teeth or partial dentures (p = 0.036). Findings highlight the prevalence of low protein intake, uneven mealtime protein distribution and importance of dentition for adequate protein intake among adults in advanced age.

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