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Erratum. Match Running Performance in Australian Football Is Related to Muscle Fiber Typology
International Journal of Sports Physiology and Performance
Resistance Exercise Training, a Simple Intervention to Preserve Muscle Mass and Strength in Prostate Cancer Patients on Androgen Deprivation Therapy
Lisanne H.P. Houben, Milou Beelen, Luc J.C. van Loon, and Sandra Beijer
Androgen deprivation therapy (ADT) forms the cornerstone in the treatment of advanced prostate cancer. However, by suppressing testosterone ADT results in a decrease of skeletal muscle mass. In this narrative review, we explore the magnitude and mechanisms of ADT-induced muscle mass loss and the consequences for muscle strength and physical performance. Subsequently, we elucidate the effectiveness of supervised resistance exercise training as a means to mitigate these adverse effects. Literature shows that resistance exercise training can effectively counteract ADT-induced loss of appendicular lean body mass and decline in muscle strength, while the effect on physical performances is inconclusive. As resistance exercise training is feasible and can be safely implemented during ADT (with special attention for patients with bone metastases), it should be incorporated in standard clinical care for prostate cancer patients (starting) with ADT.
Acknowledgments
Bringing on the Next Generation of Sport Scientists: The Benefits of Work-Integrated Learning
David B. Pyne
Erratum: Developing Coaches’ Knowledge of the Athlete–Coach Relationship Through Formal Coach Education: The Perceptions of Football Association Coach Developers
International Sport Coaching Journal
International Council for Coaching Excellence (ICCE) 14th Global Coach Conference
Acknowledgments
The Future of Para Report Cards on Physical Activity of Children and Adolescents With Disabilities—A Global Call for Engagement, Data, and Advocacy
Mark S. Tremblay, Iryna Demchenko, John J. Reilly, Salomé Aubert, and Cindy Sit
What Makes Teachers’ Professional Learning More or Less Effective?: An Evolution of Community of Practice for Physical Education Teachers
Keejoon Yoon, Sunghae Park, and Hyunwoo Jung
Purpose: The purpose of this project was to explore the developmental stages of a community of practice (CoP) and its impact on teachers’ professional learning. Methods: Eight physical education (PE) teachers and one professor participated in this project, which specifically examined a CoP focused on PE (PE-CoP). Interviews and observations, as well as a focus group, were used to collect the data, which were analyzed through a constructivist revision of grounded theory. Results: The PE-CoP, which shared the same teaching model, progressed rapidly in its early stage by providing the teachers with collaborative activities to develop innovative pedagogies. Learning from the existing members was then added as a main type of professional learning for the teachers. The PE-CoP, however, gradually lost its collaborative approach, which led to ineffective professional learning. Conclusions: Finding an optimal balance between retaining focus on the primary goal of creating a CoP and offering fresh activities for more experienced members was determined to be a key factor in making the community healthy and sustainable.
Partly Substituting Whey for Collagen Peptide Supplementation Improves Neither Indices of Muscle Damage Nor Recovery of Functional Capacity During Eccentric Exercise Training in Fit Males
Ruben Robberechts, Chiel Poffé, Noémie Ampe, Stijn Bogaerts, and Peter Hespel
Previous studies showed that collagen peptide supplementation along with resistance exercise enhance muscular recovery and function. Yet, the efficacy of collagen peptide supplementation in addition to standard nutritional practices in athletes remains unclear. Therefore, the objective of the study was to compare the effects of combined collagen peptide (20 g) and whey protein (25 g) supplementation with a similar daily protein dose (45 g) of whey protein alone on indices of muscle damage and recovery of muscular performance during eccentric exercise training. Young fit males participated in a 3-week training period involving unilateral eccentric exercises for the knee extensors. According to a double-blind, randomized, parallel-group design, before and after training, they received either whey protein (n = 11) or whey protein + collagen peptides (n = 11). Forty-eight hours after the first training session, maximal voluntary isometric and dynamic contraction of the knee extensors were transiently impaired by ∼10% (P time < .001) in whey protein and whey protein + collagen peptides, while creatine kinase levels were doubled in both groups (P time < .01). Furthermore, the training intervention improved countermovement jump performance and maximal voluntary dynamic contraction by respectively 8% and 10% (P time < .01) and increased serum procollagen type 1N-terminal peptide concentration by 10% (P time < .01). However, no differences were found for any of the outcomes between whey and whey protein + collagen peptides. In conclusion, substituting a portion of whey protein for collagen peptide, within a similar total protein dose, improved neither indices of eccentric muscle damage nor functional outcomes during eccentric training.
