). Scholars have called for a more balanced research agenda in regard to the sport industry in which the phenomena of work–family conflict (WFC) and work–family enrichment (WFE) are examined among men who are fathers ( Dixon & Bruening, 2007 ; Graham & Dixon, 2014 ; Schenewark & Dixon, 2012 ). This study
Jeffrey A. Graham and Marlene A. Dixon
Dana M. Lis and Keith Baar
measured in a healthy athletic human body. Therefore, the current study aimed to determine the effect of different preparations of collagen supplements on collagen synthesis rates. Subjects were provided with 15 g of vitamin C–enriched collagen either as a drink containing gelatin or HC or as a gummy
Katja Linde and Dorothee Alfermann
Physical and cognitive activity seems to be an effective strategy by which to promote age-sensitive fluid cognitive abilities in older adults.
In this randomized controlled trial, 70 healthy senior citizens (age 60–75) were allocated to a physical, cognitive, combined physical plus cognitive, and waiting control group. The trial assessed information processing speed, short-term memory, spatial relations, concentration, reasoning, and cognitive speed.
In contrast to the control group, the physical, cognitive, and combined training groups enhanced their concentration immediately after intervention. Only the physical training group showed improved concentration 3 months later. The combined training group displayed improved cognitive speed both immediately and three months after intervention. The cognitive training group displayed improved cognitive speed 3 months after intervention.
Physical, cognitive, and combined physical plus cognitive activity can be seen as cognition-enrichment behaviors in healthy older adults that show different rather than equal intervention effects.
Mohsen Shafizadeh, Jane Manson, Sally Fowler-Davis, Khalid Ali, Anna C. Lowe, Judy Stevenson, Shahab Parvinpour and Keith Davids
life situations include events and objects that require the integration of the individual’s cognitive and perceptual skills along with appropriate physical actions to mobilize safely in these environments. By creating enriched physical activity environments with different levels of social and cognitive
Adam D. Osmond, Dean J. Directo, Marcus L. Elam, Gabriela Juache, Vince C. Kreipke, Desiree E. Saralegui, Robert Wildman, Michael Wong and Edward Jo
interventions might also be credited to the codependency of other amino acids, notably isoleucine and valine. Kato et al 15 demonstrated, in an animal model, that the consumption of a leucine-enriched essential amino acid mixture attenuated muscle soreness following a bout of eccentric exercise. In addition
Fiona J. Connor-Kuntz and Gail M. Dummer
Children age 4 to 6 years from special education (n = 26), Head Start (n = 35), and typical preschool classes (n = 11) were assigned to a physical activity intervention or a language-enriched physical activity intervention. Language and motor skill performances were measured before, immediately following, and 3 months following the 24-session, 8-week intervention. Results illustrated that language instruction can be added to physical education lessons without requiring additional instructional time and, more importantly, without compromising improvement in motor skill performance. Further, preschool children exposed to language-enriched physical education improved their language skills regardless of whether their educational progress was characterized by a cognitive and/or language delay. Thus, physical activity appears to be an effective environment in which to enhance the cognitive development of preschool children of all abilities.
Keisuke Ueda, Yutaka Nakamura, Makoto Yamaguchi, Takeshi Mori, Masayuki Uchida and Satoshi Fujita
Although there have been many investigations of the beneficial effects of both exercise and amino acids (AAs), little is known about their combined effects on the single-dose ingestion of AAs for lipid metabolism during exercise. We hypothesize that taking a specific combination of AAs implicated in glucagon secretion during exercise may increase fat metabolism. We recently developed a new mixture, d–AA mixture (D-mix), that contains arginine, alanine, and phenylalanine to investigate fat oxidation. In a double-blind, placebo-controlled crossover study, 10 healthy male volunteers were randomized to ingest either D-mix (3 g/dose) or placebo. Subjects in each condition subsequently performed a physical task that included workload trials on a cycle ergometer at 50% of maximal oxygen consumption for 1 hr. After oral intake of D-mix, maximum serum concentrations of glycerol (9.32 ± 6.29 mg/L and 5.22 ± 2.22 mg/L, respectively; p = .028), free fatty acid level (0.77 ± 0.26 mEq/L and 0.63 ± 0.28 mEq/L, respectively; p = .022), and acetoacetic acid levels (37.9 ± 17.7 μmol/L and 30.3 ± 13.9 μmol/L, respectively; p = .040) were significantly higher than in the placebo groups. The area under the curve for glucagon during recovery was numerically higher than placebo (6.61 ± 1.33 μg/L • min and 6.06 ± 1.23 μg/L • min, respectively; p = .099). These results suggest that preexercise ingestion of D-mix may stimulate fat metabolism. Combined with exercise, the administration of AA mixtures could prove to be a useful nutritional strategy to maximize fat metabolism.
Velina B. Brackebusch
Creating experiential learning opportunities for sport management students is vital to their success in the industry. In this article, the author gives examples of how professors can successfully integrate classroom material with practical involvement in an introductory sport management course. Students participated in a semester-long community engagement project where they employed reflexive journaling and shared their experiences with others, further understanding the industry and their place in it.
David S. Rowlands, Rhys M. Thorp, Karin Rossler, David F. Graham and Mike J. Rockell
Carbohydrate ingestion after prolonged strenuous exercise enhances recovery, but protein might also be important. In a crossover with 2-wk washout, 10 cyclists completed 2.5 h of intervals followed by 4-h recovery feeding, provided 218 g protein, 435 g carbohydrate, and 79 g fat (protein enriched) or 34 g protein, 640 g carbohydrate, and 79 g fat (isocaloric control). The next morning, cyclists performed 10 maximal constant-work sprints on a Velotron cycle ergometer, each lasting ~2.5 min, at ~5-min intervals. Test validity was established and test reliability and the individual response to the protein-enriched condition estimated by 6 cyclists’ repeating the intervals, recovery feeding, and performance test 2 wk later in the protein-enriched condition. During the 4-h recovery, the protein-enriched feeding had unclear effects on mean concentrations of plasma insulin, cortisol, and growth hormone, but testosterone was 25% higher (90% confidence limits, ± 14%). Protein enrichment also reduced plasma creatine kinase by 33% (±38%) the next morning and reduced tiredness and leg-soreness sensations during the sprints, but effects on mean sprint power were unclear (–1.4%, ±4.3%). The between-subjects trial-to-trial coefficient of variation in overall mean sprint power was 3.1% (±3.4%), whereas the variation in the protein-enriched condition was 5.9% (±6.9%), suggesting that individual responses to the protein-enriched treatment contributed to the unclear performance outcome. To conclude, protein-enriched recovery feeding had no clear effect on next-day performance.