Prescription of high-intensity aerobic interval training based on oxygen uptake kinetics
Int J Sports Med DOI: 10.1055/a-1929-0295Endurance training results in diverse adaptations that lead to increased performance and health benefits. A commonly measured training response is the analysis of oxygen uptake kinetics, representing the demand of a determined load (speed/work) on the cardiovascular, respiratory, and metabolic systems, providing useful information for the prescription of constant load or interval-type aerobic exercise. There is evidence that during high-intensity aerobic exercise some interventions prescribe brief interval times (<1-min), which may lead to a dissociation between the load prescrib...
Source: International Journal of Sports Medicine - December 1, 2022 Category: Sports Medicine Authors: Festa, Raul Ricardo Monsalves, Matias Javier Cancino, Jorge Jannas-Vela, Sebastian Tags: Review Source Type: research

Epidemiology of the injuries sustained by elite Spanish under-18 and under-20 rugby players
This study examine the injuries suffered by players (n=166) of the Spanish national men’s under-18 and under-20 rugby teams between 2015 and 2017, and identifies the actions involved in their appearance. All injuries (total n=78) sustained during matches and training were recorded as recommended by World Rugby, and injury incidence rates per 1000 player-hours (ph) calculated for both types of activity. Injuries occurred more commonly during matches than during training (incidence 105.3 [95%CI 78.7-131.9] per 1000 [ph] of match play, vs. 1.16 [95%CI0.69-1.62] per 1000 ph of training), and most days absent per 1000 ph duri...
Source: International Journal of Sports Medicine - December 1, 2022 Category: Sports Medicine Authors: Solis Mencia, Cristian Ramos- Álvarezb, Juan José Ramos Veliz, Rafael Murias-Lozano, Roberto Aramberri, Mikel Sal ó, José Carlos Tags: Orthopedics & Biomechanics Source Type: research

Reliability of a Submaximal Field Test in Wheelchair Rugby
In conclusion the submaximal field test showed moderate to excellent reliability for all measured parameters. The observed fatigue seems to be not clinically relevant. The test can be recommended to assess the effects of training or interventions. [...] Georg Thieme Verlag Rüdigerstraße 14, 70469 Stuttgart, GermanyArticle in Thieme eJournals: Table of contents  |  Abstract  |  Full text (Source: International Journal of Sports Medicine)
Source: International Journal of Sports Medicine - December 1, 2022 Category: Sports Medicine Authors: Grossmann, Fabian Perret, Claudio Roelands, Bart Meeusen, Romain Flueck, Joelle Leonie Tags: Training & Testing Source Type: research

Retrograde Training: Effects on Lower Body Strength and Power
Int J Sports Med DOI: 10.1055/a-1796-7808Backward walking and running on positive grades (retrograde training) represents a closed kinetic chain exercise used by rehabilitation specialists for patellofemoral-related injuries. To date, no longitudinal studies exist to support it use. This investigation examined the effects of retrograde training on lower body strength and power in recreational athletes aged 18–50 years over 6 weeks. Thirty-seven subjects were divided into two groups. Group 1 performed retrograde training 3 days∙wk−1 using treadmill ...
Source: International Journal of Sports Medicine - December 1, 2022 Category: Sports Medicine Authors: Ferley, Derek D. Osborn, Roy Vukovich, Matt Tags: Training & Testing Source Type: research

Both Hypoxia and Hypobaria Impair Baroreflex Sensitivity but through Different Mechanisms
Int J Sports Med DOI: 10.1055/a-1960-3407Baroreflex sensitivity (BRS) is a measure of cardiovagal baroreflex and is lower in normobaric and hypobaric hypoxia compared to normobaric normoxia. The aim of this study was to assess the effects of hypobaria on BRS in normoxia and hypoxia. Continuous blood pressure and ventilation were recorded in eighteen seated participants in normobaric normoxia (NNx), hypobaric normoxia (HNx), normobaric hypoxia (NHx) and hypobaric hypoxia (HHx). Barometric pressure was matched between NNx vs. NHx (723±4 mmHg) and HNx vs. HHx ...
Source: International Journal of Sports Medicine - December 1, 2022 Category: Sports Medicine Authors: Bourdillon, Nicolas Aebi, Mathias Rolland Kayser, Bengt Bron, Denis Millet, Gregoire P Tags: Physiology & Biochemistry Source Type: research

Epidemiology of the Injuries Sustained by Elite Spanish under-18 and under-20 Rugby Players
This study examines the injuries suffered by players (n=166) of the Spanish national men’s under-18 and under-20 rugby teams between 2015 and 2017, and identifies the actions involved in their occurrence. All injuries (total n=78) sustained during matches and training were recorded as recommended by World Rugby, and injury incidence rates per 1000 player-hours (ph) calculated for both types of activity. Injuries occurred more commonly during matches than during training (incidence 105.3 [95% CI: 78.7–131.9] per 1000 [ph] of match play, vs 1.16 [95% C...
Source: International Journal of Sports Medicine - December 1, 2022 Category: Sports Medicine Authors: Mencia, Cristian Solis Ramos- Álvarez, Juan José Veliz, Rafael Ramos Murias-Lozano, Roberto Aramberri, Mikel Sal ó, José Carlos Tags: Orthopedics & Biomechanics Source Type: research

Adding intermittent vibration to varied-intensity work intervals: no extra benefit
Int J Sports Med DOI: 10.1055/a-1812-7600Varied-intensity work intervals have been shown to induce higher fractions of maximal oxygen uptake during high-intensity interval training compared with constant-intensity work intervals. We assessed whether varied-intensity work intervals combined with intermittent vibration could further increase cyclists’ fraction of maximal oxygen uptake to potentially optimise adaptive stimulus. Thirteen cyclists (V̇O2max: 69.7±7.1 ml·kg-1·min-1) underwent a performance assessment and two high-intensity interval training sessions. Both comprised six 5-minute varied-intensity work interva...
Source: International Journal of Sports Medicine - November 11, 2022 Category: Sports Medicine Authors: Bossi, Arthur Henrique Mesquida, Cristian Hopker, James Ronnestad, Bent R. Tags: Training & Testing Source Type: research

Effects of Minimalist Shoes on Plantar Intrinsic Foot Muscle Size and Strength: A Review
Int J Sports Med DOI: 10.1055/a-1908-8867Minimalist shoes are proposed to prevent injury and enhance performance by strengthening intrinsic foot muscles, yet there is little consensus on the effectiveness of minimalist shoes in increasing their strength or size. This systematic review assesses using minimalist shoes as an intervention on changes in plantar intrinsic foot muscle size and strength. PubMed, CINHAL, Scopus, and SPORT Discus were systematically searched for articles between January 2000 to March 2022. Studies were included if they had an intervention of at least 2 weeks with a control group and examined the eff...
Source: International Journal of Sports Medicine - November 11, 2022 Category: Sports Medicine Authors: Xu, Jennifer Saliba, Susan A Jaffri, Abbis H Tags: Review Source Type: research

Characteristics predictive of word recall performance following adolescent concussion
Int J Sports Med DOI: 10.1055/a-1941-5673Clinicians rely on objective concussion assessments which may be influenced by patient characteristics, creating difficulties in isolating the effect of concussion on patient function. The purpose of our study was to identify characteristics associated with performance on the Sport Concussion Assessment Tool 5th edition (SCAT5) 10-word recall test following adolescent concussion. We evaluated patients seen for care within 14 days of concussion (n=125; 15.2±1.6 years of age, range=11-18 years; 46% female; 6.9±3.4 days post-concussion). Patient demographic (age, sex, medical and con...
Source: International Journal of Sports Medicine - November 11, 2022 Category: Sports Medicine Authors: Wingerson, Mathew J Wilson, Julie Seehusen, Corrine N Walker, Gregory A Howell, David R Tags: Clinical Sciences Source Type: research

Association between self-reported overtraining syndrome and symptoms in high school track and field athletes
In conclusion, athletes with OTS-like symptoms may be prone to injuries and diseases. Hence, although OTS is difficult to diagnose, further attention should be paid to minimize OTS-related risks. [...] Georg Thieme Verlag KG Rüdigerstraße 14, 70469 Stuttgart, GermanyArticle in Thieme eJournals: Table of contents  |  Abstract (Source: International Journal of Sports Medicine)
Source: International Journal of Sports Medicine - November 11, 2022 Category: Sports Medicine Authors: Tsukahara, Yuka Kamada, Hiroshi Torii, Suguru Yamasawa, Fumihiro Tags: Clinical Sciences Source Type: research

Adding Intermittent Vibration to Varied-intensity Work Intervals: No Extra Benefit
Int J Sports Med DOI: 10.1055/a-1812-7600Varied-intensity work intervals have been shown to induce higher fractions of maximal oxygen uptake during high-intensity interval training compared with constant-intensity work intervals. We assessed whether varied-intensity work intervals combined with intermittent vibration could further increase cyclists’ fraction of maximal oxygen uptake to potentially optimise adaptive stimulus. Thirteen cyclists (V̇O2max: 69.7±7.1 ml·kg−1·min−1) underwent a performance assessment and two high-intensity interva...
Source: International Journal of Sports Medicine - November 11, 2022 Category: Sports Medicine Authors: Bossi, Arthur Henrique Mesquida, Cristian Hopker, James R ønnestad, Bent Ronny Tags: Training & Testing Source Type: research

The Effects of Minimalist Shoes on Plantar Intrinsic Foot Muscle Size and Strength: A Systematic Review
Int J Sports Med DOI: 10.1055/a-1908-8867Minimalist shoes are proposed to prevent injury and enhance performance by strengthening intrinsic foot muscles, yet there is little consensus on the effectiveness of minimalist shoes in increasing muscle strength or size. This systematic review assesses using minimalist shoes as an intervention on changes in plantar intrinsic foot muscle size and strength. PubMed, CINHAL, Scopus, and SPORT Discus were systematically searched for articles from January 2000 to March 2022. Studies were included if they had an intervention of ...
Source: International Journal of Sports Medicine - November 11, 2022 Category: Sports Medicine Authors: Xu, Jennifer Saliba, Susan A Jaffri, Abbis H Tags: Review Source Type: research

Altered Core Temperature and Salivary Melatonin in Athletes with a Cervical Spinal Cord Injury
Int J Sports Med DOI: 10.1055/a-1925-7531Sleep disturbances are common in athletes with a cervical spinal cord injury (cSCI) and may be associated with circadian alterations. Therefore, the purpose of this study was to compare physiological circadian outputs between athletes with a cSCI and non-disabled controls (CON). Eight male wheelchair athletes with a cSCI and eight male CON (30±4 and 30±6 yrs, respectively) had their core body temperature (Tcore), skin temperature (Tskin), and salivary melatonin measured during a 24 h period. In the cSCI grou...
Source: International Journal of Sports Medicine - November 11, 2022 Category: Sports Medicine Authors: Murphy, Conor J Hartescu, Iuliana Leicht, Christof A Goosey-Tolfrey, Victoria L Tags: Physiology & Biochemistry Source Type: research

Shoulder Internal Rotator Strength as Risk Factor for Shoulder Pain in Volleyball Players
Int J Sports Med DOI: 10.1055/a-1806-2303The aim of this study was to identify the intrinsic factors that could increase risk of shoulder pain in adolescent volleyball players. Twenty-eight young male volleyball players (between 14 and 18 years old) participated in this study. Athletes were submitted to: isokinetic muscle strength assessment of shoulder rotator muscles, ball service speed assessment, anterior and posterior drawer test, apprehension test, groove sign and scapular dyskinesia test. Athletes were followed for 16 weeks to monitor the presence of should...
Source: International Journal of Sports Medicine - November 11, 2022 Category: Sports Medicine Authors: de Lira, Claudio Andre Barbosa Vargas, Valentine Zimermann Vancini, Rodrigo Luiz Hill, Lee Nikolaidis, Pantelis Theodoros Knechtle, Beat Andrade, Mar ília dos Santos Tags: Orthopedics & Biomechanics Source Type: research

Association of the CKM rs8111989 Polymorphism with Injury Epidemiology in Football Players
Int J Sports Med DOI: 10.1055/a-1945-8982The influence of the rs8111989 polymorphism in the muscle-specific creatine kinase gene (CKM) on injury incidence is unknown. The aim was to investigate CKM polymorphism on injury incidence in high-performance football players. A cohort of 109 high-performance players was genotyped by using saliva samples. Injury incidence was similar in players with the GG, GA, and AA genotypes and did not modify incidence during training or match exposure (p=0.583 and p=0.737 respectively). GG players had a higher frequency of s...
Source: International Journal of Sports Medicine - November 11, 2022 Category: Sports Medicine Authors: Varillas-Delgado, David Morencos, Esther Gutierrez-Hell ín, Jorge Aguilar-Navarro, Millan Maestro, Antonio Perucho, Teresa Coso, Juan Del Tags: Genetics & Molecular Biology Source Type: research