title: The Influence of Match-Day Napping in Elite Female Netball Athletes

authors: O'Donnell, Shannon Lea

subjects: team-sports

abstract: Purpose:
To assess the effect of match-day napping and duration of naps on perceptual and performance indices in elite female netball players over two consecutive netball seasons.

Methods:
Fourteen elite female netball athletes (mean ± SD; age = 23 ± 6 yr) participated in an observational study over 26 competition matches. On each match day, athletes provided information on their napping habits, perceived energy levels, and then performed 3 countermovement jumps (CMJ) 3h30 prior to the start of the match. One hour following the match, subjective player performance ratings from the players and two members of the coaching staff were obtained. Naps were characterized into 3 conditions for analysis; No Nap (NN), <20 min Nap (SHORT), and ≥20 min Nap (LONG).

Results:
A significant difference in peak jump velocity was observed between the SHORT and the NN condition in favor of the shorter nap (3.23 ± 0.26 and 3.07 ± 0.36 m.s-1, respectively, d = 0.34, p < 0.05). A moderate, significant difference (d = 0.85; p < 0.05) was observed for the coach rating of performance (out of 10) between the SHORT and the NN condition (7.2 ± 0.8 and 6.4 ± 0.9, respectively) in favor of SHORT.

Conclusion:
The findings from the study would suggest that a short nap (<20 min) on the day of competition can enhance jump velocity and improve subjective performance in elite netball players, as assessed by coaching staff.

text: The Influence of Match-Day Napping in Elite Female Netball Athletes Purpose:
To assess the effect of match-day napping and duration of naps on perceptual and performance indices in elite female netball players over two consecutive netball seasons.

Methods:
Fourteen elite female netball athletes (mean ± SD; age = 23 ± 6 yr) participated in an observational study over 26 competition matches. On each match day, athletes provided information on their napping habits, perceived energy levels, and then performed 3 countermovement jumps (CMJ) 3h30 prior to the start of the match. One hour following the match, subjective player performance ratings from the players and two members of the coaching staff were obtained. Naps were characterized into 3 conditions for analysis; No Nap (NN), <20 min Nap (SHORT), and ≥20 min Nap (LONG).

Results:
A significant difference in peak jump velocity was observed between the SHORT and the NN condition in favor of the shorter nap (3.23 ± 0.26 and 3.07 ± 0.36 m.s-1, respectively, d = 0.34, p < 0.05). A moderate, significant difference (d = 0.85; p < 0.05) was observed for the coach rating of performance (out of 10) between the SHORT and the NN condition (7.2 ± 0.8 and 6.4 ± 0.9, respectively) in favor of SHORT.

Conclusion:
The findings from the study would suggest that a short nap (<20 min) on the day of competition can enhance jump velocity and improve subjective performance in elite netball players, as assessed by coaching staff.

year: 2018

title: Evolution and comparative haemoglobin oxygen binding in new zealand mudfishes

authors: Brijs, Jeroen

subjects: mudfish

abstract: New Zealand's five endemic mudfish (Neochanna spp.) species have distributions that differ both geographically and by habitat type. Differences in habitat preferences between species have led to the proposal of an evolutionary series within the group. A morphological cline can be observed from the galaxiform Chatham Island and Canterbury species inhabiting lakes and streams, respectively, to the anguilliform Northland and brown mudfishes of ephemeral wetlands. Morphological specializations proposed for wetland dwelling include loss of pelvic fins, reduced eyes, enlarged nostrils, development of caudal flanges, and elongation of dorsal and anal fin bases to become almost confluent with the caudal fin.  Another expectation of adaptation to wetland dwelling is specializations in respiratory physiology to obtain oxygen from highly hypoxic or acidic waters, and the ability to cope with seasonal exposure to air during the drought season.  Expected respiratory specializations to wetland dwelling include high oxygen affinity haemoglobins, high levels of cooperative oxygen binding, the presence of multiple haemoglobins and the ability to aestivate and survive long periods of emersion. 

The four mainland Neochanna species were examined to determine if differences in haemoglobin expression as well as differences in haemoglobin oxygen binding correlated with differing habitats and treatments.  Whole blood oxygen affinity was determined at several pH levels (6.5, 7.0, 7.5 and 8.0) and temperatures (10'C, 15'C and 20'C), as well as different treatments (aestivating, fasting and control) using a Hemox analyzer.  The presence of multiple haemoglobins was determined by isoelectric focusing.  All four species displayed high oxygen affinities (p50 = 6.5 to 9.5 mm Hg at pH 7.5  15'C), moderate levels of cooperativity (Hill coefficients = 1.75 to 2.00 at pH 7.5  15'C), pH sensitivity (Bohr coefficients = -0.62 to -0.94 between pH 7.5 and 7.0 at 15'C), temperature sensitivity (ΔH = -2.20 to -15.78 k cal mol-1 between 10'C and 15'C) and the presence of multiple haemoglobins.  Black, brown and Northland mudfish were able to survive aestivation for six weeks but there were no changes between air-breathing and water-breathing individuals with respect to oxygen binding characteristics.  Although there is evidence of habitat specialization in haemoglobin physiology between mudfish species, differences between species did not correlate with the evolutionary series proposed for specialization to dwelling in ephemeral wetlands and latitudinal distributions of mudfish species appear to strongly dictate oxygen binding properties of mudfish whole blood.

text: Evolution and comparative haemoglobin oxygen binding in new zealand mudfishes New Zealand's five endemic mudfish (Neochanna spp.) species have distributions that differ both geographically and by habitat type. Differences in habitat preferences between species have led to the proposal of an evolutionary series within the group. A morphological cline can be observed from the galaxiform Chatham Island and Canterbury species inhabiting lakes and streams, respectively, to the anguilliform Northland and brown mudfishes of ephemeral wetlands. Morphological specializations proposed for wetland dwelling include loss of pelvic fins, reduced eyes, enlarged nostrils, development of caudal flanges, and elongation of dorsal and anal fin bases to become almost confluent with the caudal fin.  Another expectation of adaptation to wetland dwelling is specializations in respiratory physiology to obtain oxygen from highly hypoxic or acidic waters, and the ability to cope with seasonal exposure to air during the drought season.  Expected respiratory specializations to wetland dwelling include high oxygen affinity haemoglobins, high levels of cooperative oxygen binding, the presence of multiple haemoglobins and the ability to aestivate and survive long periods of emersion. 

The four mainland Neochanna species were examined to determine if differences in haemoglobin expression as well as differences in haemoglobin oxygen binding correlated with differing habitats and treatments.  Whole blood oxygen affinity was determined at several pH levels (6.5, 7.0, 7.5 and 8.0) and temperatures (10'C, 15'C and 20'C), as well as different treatments (aestivating, fasting and control) using a Hemox analyzer.  The presence of multiple haemoglobins was determined by isoelectric focusing.  All four species displayed high oxygen affinities (p50 = 6.5 to 9.5 mm Hg at pH 7.5  15'C), moderate levels of cooperativity (Hill coefficients = 1.75 to 2.00 at pH 7.5  15'C), pH sensitivity (Bohr coefficients = -0.62 to -0.94 between pH 7.5 and 7.0 at 15'C), temperature sensitivity (ΔH = -2.20 to -15.78 k cal mol-1 between 10'C and 15'C) and the presence of multiple haemoglobins.  Black, brown and Northland mudfish were able to survive aestivation for six weeks but there were no changes between air-breathing and water-breathing individuals with respect to oxygen binding characteristics.  Although there is evidence of habitat specialization in haemoglobin physiology between mudfish species, differences between species did not correlate with the evolutionary series proposed for specialization to dwelling in ephemeral wetlands and latitudinal distributions of mudfish species appear to strongly dictate oxygen binding properties of mudfish whole blood.

year: 2007

title: What (actually) matters in literacy education: Contributions from community psychology

authors: Furness, Jane Amanda

subjects: Family literacy

abstract: This paper describes the critical role community psychology theories played in reframing literacy research involving mainly Māori and Pacific peoples’ extended families and communities. Within a critical social constructionist paradigm, ecological systems theory and holistic, integrative theories of wellbeing brought much-needed new thinking to how family-focused adult literacy education might be theorised and practiced. This reframing marks a challenge to and movement away from still-dominant Western individualistic, behavioural orientated, skills-based and formal economy-focused ways of thinking about people’s literacy abilities. It highlights the important role of community psychology in developing theory, informing policy and enhancing practices in culturally diverse education settings to achieve both educational and quality of life aims. Improving quality of life is not possible through literacy education in and of itself, but rather through the inculcation in programme design and delivery of those things which are fundamental and critical to the participants’ overall wellbeing and welfare.

text: What (actually) matters in literacy education: Contributions from community psychology This paper describes the critical role community psychology theories played in reframing literacy research involving mainly Māori and Pacific peoples’ extended families and communities. Within a critical social constructionist paradigm, ecological systems theory and holistic, integrative theories of wellbeing brought much-needed new thinking to how family-focused adult literacy education might be theorised and practiced. This reframing marks a challenge to and movement away from still-dominant Western individualistic, behavioural orientated, skills-based and formal economy-focused ways of thinking about people’s literacy abilities. It highlights the important role of community psychology in developing theory, informing policy and enhancing practices in culturally diverse education settings to achieve both educational and quality of life aims. Improving quality of life is not possible through literacy education in and of itself, but rather through the inculcation in programme design and delivery of those things which are fundamental and critical to the participants’ overall wellbeing and welfare.

year: 2013