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https://www.readbyqxmd.com/read/29334615/hemodynamic-and-metabolic-responses-to-self-paced-and-ramp-graded-exercise-testing-protocols
#1
Nicholas M Beltz, Fabiano Amorim, Ann L Gibson, Jeffrey M Janot, Len Kravitz, Christine M Mermier, Nathan Cole, Terence A Moriarty, Tony P Nunez, Sam Trigg, Lance Dalleck
PURPOSE: Recent examinations have shown lower maximal oxygen uptake (VO2max) during traditional ramp (RAMP) compared to self-paced (SPV) graded exercise testing (GXT) attributed to differences in cardiac ouput. The current study examined the differences in hemodyamic and metabolic responses between RAMP and SPV during treadmill exercise. METHODS: Sixteen recreationally trained men (23.7±3.0 yrs) completed two separate treadmill GXT protocols. SPV consisted of five 2-min stages (10 min total) of increasing speed clamped by the Borg RPE6-20 scale...
January 15, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29334005/physiological-correlations-with-short-medium-and-long-cycling-time-trial-performance
#2
Fernando K Borszcz, Artur F Tramontin, Kristopher M de Souza, Lorival J Carminatti, Vitor P Costa
PURPOSE: Several studies have demonstrated that physiological variables predict cycling endurance performance. However, it is still unclear whether the predictors will change over different performance durations. The aim of this study was to assess the correlations between physiological variables and cycling time trials with different durations. METHODS: Twenty trained male cyclists (maximal oxygen uptake [VO2max] = 60.5 ± 5.6 mL/kg/min) performed 4 separate experimental trials during a 2-week period...
January 15, 2018: Research Quarterly for Exercise and Sport
https://www.readbyqxmd.com/read/29331459/garlic-allium-sativum-l-fed-to-dairy-cows-does-not-modify-the-cheese-making-properties-of-milk-but-affects-the-color-texture-and-flavor-of-ripened-cheese
#3
Giulia Rossi, Stefano Schiavon, Giovanna Lomolino, Claudio Cipolat-Gotet, Alberto Simonetto, Giovanni Bittante, Franco Tagliapietra
Garlic and garlic components have recently been proposed as ruminal activity modulators to reduce the enteric methane emissions of ruminants, but little is known of their influence on milk coagulation properties, nutrient recovery, cheese yield, and sensorial and rheological characteristics of milk and cheese. The present study assessed the effects of garlic and diallyl sulfide supplements on dry matter intake (DMI), productive performance, milk coagulation properties, cheese yield, milk and cheese sensory profiles, and rheological characteristics...
January 10, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29315164/effects-of-strength-training-on-postpubertal-adolescent-distance-runners
#4
Richard C Blagrove, Louis P Howe, Emily J Cushion, Adam Spence, Glyn Howatson, Charles R Pedlar, Philip R Hayes
PURPOSE: Strength training activities have consistently been shown to improve running economy (RE) and neuromuscular characteristics, such as force producing ability and maximal speed, in adult distance runners. However the effects on adolescent (<18 years) runners remains elusive. This randomized control trial aimed to examine the effect of strength training on several important physiological and neuromuscular qualities associated with distance running performance. METHODS: Participants (n=25, 13 female, 17...
January 8, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29295551/animal-based-measures-to-assess-the-welfare-of-extensively-managed-ewes
#5
Carolina Munoz, Angus Campbell, Paul Hemsworth, Rebecca Doyle
The reliability and feasibility of 10 animal-based measures of ewe welfare were examined for use in extensive sheep production systems. Measures were: Body condition score (BCS), rumen fill, fleece cleanliness, fleece condition, skin lesions, tail length, dag score, foot-wall integrity, hoof overgrowth and lameness, and all were examined on 100 Merino ewes (aged 2-4 years) during mid-pregnancy, mid-lactation and weaning by a pool of nine trained observers. The measures of BCS, fleece condition, skin lesions, tail length, dag score and lameness were deemed to be reliable and feasible...
December 24, 2017: Animals: An Open Access Journal From MDPI
https://www.readbyqxmd.com/read/29290448/technical-note-validation-of-an-ear-tag-accelerometer-sensor-to-determine-rumination-eating-and-activity-behaviors-of-grazing-dairy-cattle
#6
G M Pereira, B J Heins, M I Endres
The objective of this study was to validate an ear-tag accelerometer sensor (CowManager SensOor, Agis Automatisering BV, Harmelen, the Netherlands) using direct visual observations in a grazing dairy herd. Lactating crossbred cows (n = 24) were used for this experiment at the University of Minnesota West Central Research and Outreach Center grazing dairy (Morris, MN) during the summer of 2016. A single trained observer recorded behavior every minute for 6 h for each cow (24 cows × 6 h = 144 h of observation total)...
December 28, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29284165/lactate-threshold-as-a-measure-of-aerobic-metabolism-in-resistance-exercise
#7
Raúl Domínguez, José Luis Maté-Muñoz, Noemí Serra-Paya, Manuel Vicente Garnacho-Castaño
In resistance training, load intensity is usually calculated as the percentage of a maximum repetition (1RM) or maximum number of possible repetitions (% of 1RM). Some studies have proposed a lactate threshold (LT) intensity as an optimal approach for concurrent training of cardiorespiratory endurance and muscle strength, as well as an alternative in resistance training. The objective of the present study was to analyze the results obtained in research evaluating the use of LT in resistance training. A keyword and search tree strategy identified 14 relevant articles in the Dialnet, Elsevier, Medline, Pubmed, Scopus and Web of Science databases...
December 28, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29283929/the-effect-of-three-different-maximal-concentric-velocity-squat-protocols-on-mapk-phosphorylation-and-endocrine-responses
#8
Rebecca A Kudrna, Andrew C Fry, Justin X Nicoll, Phillip M Gallagher, Michael R Prewitt
The purpose of this study was to determine the effect of three different back squat protocols on intra-cellular signaling, endocrine responses, and power fatigue. Nine recreationally trained males (X±SD; age: 21.4±0.6yrs; height: 177.8±5.1cm; weight: 78.7±9.7kg), completed three maximal concentric velocity squat protocols in a randomized order. Testing protocols consisted of 5 sets of 10 repetitions at 30% of 1RM; 5 sets of 5 repetitions at 70% of 1RM; and 5 sets of 3 repetitions at 90% of 1RM. Average system power for each set was obtained with a tethered external dynamometer...
December 27, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29281146/comparison-of-the-inflammatory-and-stress-response-between-sprint-interval-swimming-and-running
#9
R A Casuso, J Aragon-Vela, J R Huertas, A Ruiz-Ariza, E J Martínez-Lopez
The aim of the study was to compare myocellular damage, metabolic stress and inflammatory responses as well as circulating sodium (Na+ ) and potassium (K+ ) between a single sprint swimming and running training. Eighteen subjects regularly involved in swimming and running training for at least two years were recruited. The subjects performed 8 x 30 s "all out" exercise on different days either by running or by swimming in a random order. Blood was collected before each training session, after the cessation of exercise (post) and after 2 h of rest (2 h)...
December 27, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29280079/photobiomodulation-increases-mitochondrial-citrate-synthase-activity-in-rats-submitted-to-aerobic-training
#10
Wouber Hérickson de Brito Vieira, Cleber Ferraresi, Maria Luiza Barcellos Schwantes, Sérgio Eduardo de Andrade Perez, Vilmar Baldissera, Mikhail Santos Cerqueira, Nivaldo Antonio Parizotto
This study investigated the effects of photobiomodulation by low-laser laser therapy (LLLT) on the activities of citrate synthase (CS) and lactate dehydrogenase (LDH) and the anaerobic threshold (AT) in rats submitted to treadmill exercise. Fifty-four rats were allocated into four groups: rest control (RCG), rest laser (RLG), exercise control (ECG), and exercise laser (ELG). The infrared LLLT was applied daily on the quadriceps, gluteus maximum, soleus, and tibialis anterior muscles. Muscle samples (soleus, tibialis anterior, and cardiac muscles) were removed 48 h after the last exercise session for spectrophotometric analysis of the CS and LDH...
December 26, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/29262272/effects-of-carbohydrate-mouth-rinse-and-caffeine-on-high-intensity-interval-running-in-a-fed-state
#11
Simon Devenney, Shane Mangan, Marcus Shortall, Kieran Collins
The current study aims to identify if mouth rinsing with a 6% carbohydrate solution (CMR) and mouth rinsing and ingestion of caffeine (CMR+CAFF) can affect exercise performance during steady state (SS) running and high intensity intervals (HIT) in comparison to a 0% control solution (PLA), when in a fed state. Eight recreationally trained males completed three trials (CMR, CMR + CAFF, and PLA) of 45-min SS run and a HIT protocol (90% peak treadmill velocity) until fatigue in a double blinded, repeated measures study...
December 20, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29258800/why-does-the-need-for-medication-become-a-barrier-to-breastfeeding-a-narrative-review
#12
Alyson K McClatchey, Alison Shield, Lynn H Cheong, Sally L Ferguson, Gabrielle M Cooper, Gregory J Kyle
PROBLEM: The need for medication during lactation can contribute to the early cessation of breastfeeding. BACKGROUND: Breastfeeding women may require medication for acute or chronic health conditions. For some women this need for medication can become a barrier to breastfeeding; this is despite the fact that the majority of medications are considered to be compatible with lactation. AIM: This narrative review aims to investigate factors relating to medicines safety that could contribute to medication unnecessarily becoming a barrier to breastfeeding...
December 16, 2017: Women and Birth: Journal of the Australian College of Midwives
https://www.readbyqxmd.com/read/29249083/effects-of-strength-training-on-the-physiological-determinants-of-middle-and-long-distance-running-performance-a-systematic-review
#13
REVIEW
Richard C Blagrove, Glyn Howatson, Philip R Hayes
BACKGROUND: Middle- and long-distance running performance is constrained by several important aerobic and anaerobic parameters. The efficacy of strength training (ST) for distance runners has received considerable attention in the literature. However, to date, the results of these studies have not been fully synthesized in a review on the topic. OBJECTIVES: This systematic review aimed to provide a comprehensive critical commentary on the current literature that has examined the effects of ST modalities on the physiological determinants and performance of middle- and long-distance runners, and offer recommendations for best practice...
December 16, 2017: Sports Medicine
https://www.readbyqxmd.com/read/29248231/heritabilities-and-genetic-correlations-in-the-same-traits-across-different-strata-of-herds-created-according-to-continuous-genomic-genetic-and-phenotypic-descriptors
#14
Tong Yin, Sven König
The most common approach in dairy cattle to prove genotype by environment interactions is a multiple-trait model application, and considering the same traits in different environments as different traits. We enhanced such concepts by defining continuous phenotypic, genetic, and genomic herd descriptors, and applying random regression sire models. Traits of interest were test-day traits for milk yield, fat percentage, protein percentage, and somatic cell score, considering 267,393 records from 32,707 first-lactation Holstein cows...
December 13, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29244746/effects-of-beetroot-juice-supplementation-on-a-30-s-high-intensity-inertial-cycle-ergometer-test
#15
Raul Domínguez, Manuel Vicente Garnacho-Castaño, Eduardo Cuenca, Pablo García-Fernández, Arturo Muñoz-González, Fernando de Jesús, María Del Carmen Lozano-Estevan, Sandro Fernandes da Silva, Pablo Veiga-Herreros, José Luis Maté-Muñoz
Background: Beetroot juice (BJ) is rich in inorganic nitrates and has proved effective at increasing blood nitric oxide (NO) levels. When used as a supplement BJ has shown an ergogenic effect on cardiorespiratory resistance exercise modalities, yet few studies have examined its impact on high intensity efforts. Objective: To assess the effects of BJ intake on anaerobic performance in a Wingate test. Methods: Fifteen trained men (age 21.46 ± 1.72 years, height 1.78 ± 0.07 cm and weight 76.90 ± 8.67 kg) undertook a 30-s maximum intensity test on an inertial cycle ergometer after drinking 70 mL of BJ (5...
December 15, 2017: Nutrients
https://www.readbyqxmd.com/read/29236871/evaluation-of-anaerobic-threshold-in-non-pregnant-and-pregnant-rats
#16
Aline Oliveira Netto, Nathália C D Macedo, Franciane Q Gallego, Yuri K Sinzato, Gustavo T Volpato, Débora C Damasceno
Several studies present different methodologies and results about intensity exercise, and many of them are performed in male rats. However, the impact of different type, intensity, frequency and duration of exercise on female rats needs more investigation. From the analysis of blood lactate concentration during lactate minimum test (LacMin) in the swimming exercise, the anaerobic threshold (AT) was identified, which parameter is defined as the transition point between aerobic and anaerobic metabolism. LacMin test is considered a good indicator of aerobic conditioning and has been used in prescription of training in different exercise modalities...
October 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/29232524/growing-the-ibclc-workforce-a-florida-needs-assessment
#17
Aimee R Eden, Erica H Anstey, Deidre Orriola
BACKGROUND: Florida has fewer International Board Certified Lactation Consultants (IBCLCs) per 1,000 live births than the national average. An important strategy to support breastfeeding entails creating opportunities to prepare and train IBCLCs from underrepresented groups. However, it can be difficult for individuals to access lactation education and gain clinical experience necessary to become an IBCLC. Research aim: The Building a Better Breastfeeding Network project was a needs assessment designed to assess the interest in an IBCLC training program in Florida and perceived barriers and facilitators to completing such a program...
November 1, 2017: Journal of Human Lactation: Official Journal of International Lactation Consultant Association
https://www.readbyqxmd.com/read/29232314/postexercise-fructose-maltodextrin-ingestion-enhances-subsequent-endurance-capacity
#18
Ed Maunder, Tim Podlogar, Gareth A Wallis
PURPOSE: Restoring skeletal muscle and hepatic glycogen content during short-term (<6 h) recovery from prolonged exercise is pertinent for athletes seeking to maximize performance in repeated exercise bouts. Previous research suggests co-ingestion of fructose-glucose carbohydrate sources augments hepatic and has equivalent effects on skeletal muscle glycogen storage during short-term recovery from prolonged exercise compared to isocaloric glucose ingestion. The aim of the present investigation was to determine if this has a discernible effect on subsequent exercise capacity...
December 11, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29230719/resveratrol-and-or-exercise-training-counteract-aging-associated-decline-of-physical-endurance-in-aged-mice-targeting-mitochondrial-biogenesis-and-function
#19
Marwa Hassan Muhammad, Mona Maher Allam
Mitochondrial dysfunction and decreased mitochondrial content are hallmarks of aging that leads to decreased physical endurance. Our aim was to explore the anti-aging effect of resveratrol (RSVT) supplementation, a polyphenol, and/or exercise training, started at an older age, on improving physical activity, therefore, help in frailty avoidance and promotion of healthy aging in elderly. Eighteen-month-old aged mice received RSVT (15 mg/kg/day) and/or exercise trained for 4 weeks showed significant longer time to exhaustion with decreased blood lactate and free fatty acids levels associated with improved oxidative stress evidenced by decreased gastrocnemius muscle lipid peroxidation and increased antioxidant enzymes activities, catalase and superoxide dismutase, when compared to aged mice control group...
December 11, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/29224874/prepartum-application-of-internal-teat-sealant-or-intramammary-amoxicillin-on-dairy-heifers-effect-on-udder-health-survival-and-performance
#20
V S Machado, R C Bicalho
Intramammary infusion of antimicrobials (IA) and application of an internal teat sealant (ITS) at the end of the lactation is a common strategy to prevent and treat intramammary infections during the dry period. In heifers, precalving IA has been reported to improve udder health and milk quality; however, the effect of ITS in heifers housed in freestall barns is still unknown. The objective of this study was to investigate the effect of prepartum application of ITS or IA on udder health of dairy heifers. A total of 886 heifers were randomly allocated into 1 of 4 treatment groups when they were 245 ± 3 d pregnant...
December 7, 2017: Journal of Dairy Science
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