Journal of Functional Morphology and Kinesiology最新文献

{"title":"Power Output, Lactatemia, and Maximum Oxygen Consumption During a Specific Off-Water Incremental Test in International-Level Podium-Winner Kayak and Rowing Athletes.","authors":"Oscar Crisafulli, Matteo Fortunati, Tiziano Gemelli, Luca Grattarola, Venere Quintiero, Massimiliano Febbi, Patrik Drid, Stefano Ramat, Giuseppe D'Antona","doi":"10.3390/jfmk10020203","DOIUrl":"10.3390/jfmk10020203","url":null,"abstract":"<p><strong>Background: </strong>To achieve victory, kayaking and rowing athletes must develop optimal aerobic conditioning and the capacity to sustain anaerobic work production. To assess these characteristics, power output (PO), lactatemia response, and maximum oxygen uptake (VO₂max) are usually measured. The goal of this research is to report the values of PO, lactatemia, and VO₂max-expressed in relative, absolute, and body size-scaled values-in successful international-level athletes to provide reference values for those striving to compete at the highest level.</p><p><strong>Methods: </strong>A total of 15 international-level medallist boat sports athletes were recruited: 8 male kayakers (age 21 ± 3 years, height 181.7 ± 5.3 cm, body mass 78.7 ± 5.6 kg), 2 female kayakers (age 22 ± 2 years, height 168.0 ± 2.8 cm, body mass 64.9 ± 2.7 kg), and 5 male rowers (age 20 ± 1 years, height 181.9 ± 4.7 cm, body mass 83.9 ± 7.3 kg). The athletes' PO, lactatemia, and VO₂max were assessed using an off-water, sport-specific cardiopulmonary test on a paddle and rowing ergometer.</p><p><strong>Results: </strong>Respectively, in male and female kayakers and male rowers, maximum lactatemia was 11.9 ± 2.2 mmol/L, 9.3 ± 3.6 mmol/L, and 13.2 ± 3.7 mmol/L; maximum PO was 225.0 ± 13.4 W, 162.5 ± 31.8 W and 432.0 ± 33.5 W; and VO₂max was 57.6 ± 5.4 mL/min/kg, 52.2 ± 1.0 mL/min/kg, and 63.7 ± 11.7 mL/min/kg. VO₂max scaled by body size was, respectively, 311 ± 39 mL/kg^0.67/min, 319 ± 15 mL/kg^0.67/min, and 330 ± 72 mL/kg^0.67/min.</p><p><strong>Conclusions: </strong>This study is the first to report the values of PO, lactatemia, and VO₂max-expressed in relative, absolute, and body size-scaled values-assessed during a sport-specific cardiopulmonary test in international-level boat sports athletes. These values could be a preliminary reference guideline for optimal cardiorespiratory conditioning in athletes aiming at international-level competitions.</p>","PeriodicalId":16052,"journal":{"name":"Journal of Functional Morphology and Kinesiology","volume":"10 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12193873/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hamstring Strain Injury Patterns in Spanish Professional Male Football (Soccer): A Systematic Video Analysis of 78 Match Injuries.","authors":"Aitor Gandarias-Madariaga, Antonio Martínez-Serrano, Pedro E Alcaraz, Julio Calleja-González, Roberto López Del Campo, Ricardo Resta, Asier Zubillaga-Zubiaga","doi":"10.3390/jfmk10020201","DOIUrl":"10.3390/jfmk10020201","url":null,"abstract":"<p><p><b>Background</b>: To the best of the authors' knowledge, the different injury mechanisms of the hamstring muscle group have not been defined in detail in men's professional football. For this reason, the main aim of this study is to determine the mechanisms and contextual patterns associated with hamstring muscle group injuries in professional male football players in competition, using a systematic video analysis method. <b>Methods</b>: Video recordings of official matches from two consecutive seasons (2017/18 and 2018/19) of the Spanish First Division of Football (LaLiga^TM) were used for this research. The process to determine the moment of injury was carried out by two independent evaluators using an ad hoc observation tool and, subsequently, all relevant data were collected to detail the specific patterns of injury events observed. <b>Results</b>: In total, 78 cases of hamstring injuries were included for the final analysis of specific patterns. The most outstanding results were that, (1) although the sprint-related pattern (SP) is predominate (54%; 42 cases), the combined pattern 2 (COMB2) is another mechanism that appears frequently (26%; 20 cases), (2) within the SP, curved runs show a greater number of cases (52% of SP; 22 cases), (3) the majority of the injuries occur without contact (83%; 65 cases) and with the presence of the ball (88%; 69 cases), and finally, (4) the most injured positions were fullbacks/wingbacks (28%; 22 cases), central defenders (27%; 21 cases), and wingers/wide midfielders (23%; 18 cases). <b>Conclusions</b>: The SP remains the most frequent pattern in hamstring injuries; however, the present study presents other mechanisms that are also quite common and should be considered, such as curvilinear runs in SP and COMB2.</p>","PeriodicalId":16052,"journal":{"name":"Journal of Functional Morphology and Kinesiology","volume":"10 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12193792/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of Youth Water Polo Players' Swimming Sprint Potential: A New Approach to Building an International Model.","authors":"Andrea Perazzetti, Antonio Tessitore, Mehmet Zeki Özkol, Nebojša Novoselac, Milivoj Dopsaj","doi":"10.3390/jfmk10020200","DOIUrl":"10.3390/jfmk10020200","url":null,"abstract":"<p><p><b>Background</b>: To cope with their horizontal swimming phases, water polo players use different swimming techniques, such as specific variants of the crawl swimming style. Thus, this study aimed to investigate the swimming skills of young water polo players. <b>Methods</b>: An all-out 25-m sprint swimming test in crawl style was completed by 273 international youth water polo players (age = 14.0 ± 0.8 yrs) in two modalities: basic crawl with the head in the water (25C_HeadIN), and a crawl performed while dribbling the ball (25C_Ball). <b>Results</b>: We registered an average time of 14.79 and 15.64 s for 25C_HeadIN and 25C_Ball, respectively, in which the ball dribbling increased to 5% of the swimming time. A swimming skill index (25C_SIC) was calculated to account for differences in ball dribbling speeds, which, considering our international sample and in the absence of previous data, we could speculate as the first international standard value for 14-year-old male water polo players competing at international level. The averaged values for 25C_SI and 25C_SIC were 0.94 ± 0.04 (a.u.) and 1.52 ± 0.15 (a.u.), respectively. Factor analysis indicated that swimming with and without the ball are structurally distinct technical skills, highlighting the specificity of these water polo players' abilities. Moreover, the study shows significant differences (<i>p</i> < 0.05) between players from different countries and despite some limitations, its results provide valuable insights for the assessment and development of sprint swimming skills in youth water polo players. <b>Conclusions</b>: In summary, the findings of this research provide practical implications for training, player selection, player development and the optimization of youth water polo player performance.</p>","PeriodicalId":16052,"journal":{"name":"Journal of Functional Morphology and Kinesiology","volume":"10 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12194155/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Role of Post-Operative Rehabilitation in TM Joint Arthritis: Functional Outcomes of Interposition Trapeziectomy vs. Prosthesis.","authors":"Camillo Fulchignoni, Silvia Pietramala, Leopoldo Arioli, Emanuele Gerace, Domenico De Mauro, Giulia Frittella, Elisa Di Dio, Mirko Grauso, Gianfranco Merendi, Lorenzo Rocchi","doi":"10.3390/jfmk10020198","DOIUrl":"10.3390/jfmk10020198","url":null,"abstract":"<p><p><b>Background</b>: Trapeziometacarpal (TM) joint arthritis is a common condition causing pain and functional limitations, particularly in activities requiring pinch and grip strength. Surgical options such as interposition trapeziectomy and prosthetic joint replacement have demonstrated varying degrees of success. However, the role of post-operative rehabilitation in optimizing outcomes for these procedures remains underexplored. Effective rehabilitation may be critical for restoring strength, range of motion (ROM), and overall hand function; yet, no consensus exists on the best approach for either surgical modality. This study aims to evaluate the impact of post-operative rehabilitation on functional and clinical outcomes in patients undergoing interposition trapeziectomy versus prosthetic replacement for TM joint arthritis. <b>Methods</b>: A retrospective cohort study was conducted on patients treated for TM joint arthritis between November 2023 and October 2024. Patients were divided into two groups based on the surgical procedure: interposition trapeziectomy and prosthetic replacement. Patients randomly followed post-operative rehabilitation protocols, auto-assisted exercises, or no type of rehabilitation. The outcomes assessed included pain (VAS), return to work or heavy activities, post-operative complications, hand function (DASH score), and patient satisfaction at 1 and 6 months after surgery. <b>Results</b>: The prosthesis group consisted of 30 patients, while 31 patients underwent interposition trapeziectomy. Patients in both groups showed good improvements in pain, ROM, and hand function post rehabilitation. The prosthetic group demonstrated a faster recovery of strength and higher early satisfaction scores, but in the long term, the results were overlapping. No significant differences were observed in long-term functional outcomes or patient satisfaction at 6 months. In the trapeziectomy group, for patients who followed a rehabilitation program, no significant differences were found. <b>Conclusions</b>: Post-operative rehabilitation finds its place in recovery after both interposition trapeziectomy and prosthetic replacement for TM joint arthritis. While prosthetic replacement allows for quicker functional recovery, interposition trapeziectomy offers comparable long-term results with a lower complication profile. Tailored rehabilitation protocols may enhance outcomes and should be considered an integral part of TM joint arthritis management in selected patients.</p>","PeriodicalId":16052,"journal":{"name":"Journal of Functional Morphology and Kinesiology","volume":"10 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12193712/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effectiveness of Multisport Play-Based Practice on Motor Coordination in Children: A Cross-Sectional Study Using the KTK Test.","authors":"Nicola Mancini, Rita Polito, Francesco Paolo Colecchia, Dario Colella, Giovanni Messina, Vlad Teodor Grosu, Antonietta Messina, Siria Mancini, Antonietta Monda, Maria Ruberto, Fiorenzo Moscatelli","doi":"10.3390/jfmk10020199","DOIUrl":"10.3390/jfmk10020199","url":null,"abstract":"<p><p><b>Objectives:</b> This study aimed to evaluate the effectiveness of a structured multisport play-based program on the development of motor coordination in Italian children aged 6 to 10 years, using the Körperkoordinationstest für Kinder (KTK). <b>Methods:</b> An observational cross-sectional design was applied, involving 320 children (mean age 8.1 ± 1.4 years; 52% male) from the Puglia region in southern Italy. Participants were divided into a Multisport Group (MG; <i>n</i> = 162), engaged in multisport activities, and a Curricular Group (CG; <i>n</i> = 158), involved in standard physical education programs. Anthropometric measurements (weight, height, and BMI) and motor coordination outcomes (Motor Quotient, MQ) were assessed using the KTK. Statistical analyses included ANOVA, Pearson's correlations, and logistic regression models. <b>Results:</b> The results showed that the MG achieved significantly higher MQ scores (108.3 ± 12.5) compared to the CG (101.2 ± 13.4; <i>p</i> < 0.001). Moreover, higher BMI values were significantly associated with an increased risk of lower MQ scores (OR = 2.35; 95% CI: 1.45-3.81; <i>p</i> < 0.001), indicating that children with elevated BMI had more than twice the likelihood of showing impaired motor coordination. Strong positive correlations were found between all KTK subtests and the total MQ score. <b>Conclusions:</b> Participation in structured multisport programs appears to enhance motor coordination in children and may represent a valuable educational and preventive strategy within primary school physical education and public health interventions.</p>","PeriodicalId":16052,"journal":{"name":"Journal of Functional Morphology and Kinesiology","volume":"10 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12194538/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Positional Profiling of Anthropometric, Baropodometric, and Grip Strength Traits in Male Volleyball Players: Insights from a National Colombian Study.","authors":"Adrián De la Rosa, María Alejandra Camacho-Villa, Fernando Millan-Domingo, Juan Carlos Saavedra, Marina Politi Okoshi, Luana Urbano Pagan","doi":"10.3390/jfmk10020197","DOIUrl":"10.3390/jfmk10020197","url":null,"abstract":"<p><p><b>Background:</b> In volleyball, upper limb dimensions, handgrip strength (HGS), and baropodometric parameters are critical for executing offensive and defensive actions during the match. These movements demand not only physical precision but also carry a significant risk of injury, varying by playing position. <b>Objectives:</b> This study aimed to determine the differences in specific upper limb anthropometric characteristics, HGS, and selected baropodometric variables among U-23 male volleyball players concerning playing position. <b>Methods:</b> The sample consisted of 92 U-23 male players who prepared for the U-23 Men's Volleyball National Championship 2022 (20.39 (1.74) years, 184 (8.46) cm, 75.52 (10.20) kg). Playing positions analyzed were setters (<i>n</i> = 12), outside (<i>n</i> = 18), opposites (<i>n</i> = 19)<i>,</i> middle blockers (<i>n</i> = 16), and liberos <i>(n</i> = 12). <b>Results:</b> player position differences in HGS and several anthropometric upper limb variables were observed. Middle blockers, outsides, and opposites exhibited superior anthropometric traits in most of the measurements compared to liberos and setters (<i>p</i> < 0.05). Differences in baropodometric parameters were only found between feet and their zones when the entire sample was evaluated. Finally, regression analysis identified dominant hand breadth (β = 3.42, 95%CI [0.43, 6.40], upper arm muscle area (β = 0.157, 95%CI [0.02, 0.29]), and wrist diameter (β = 3.59, IC 95% [0.49, 6.68]) as associated variables of HGS. <b>Conclusions:</b> The study underscores the importance of positional profiling in volleyball, revealing key physical traits linked to performance. The observed differences are likely attributable to the specific role and physical demands inherent to each playing position. These findings can guide targeted training and injury prevention strategies to enhance performance.</p>","PeriodicalId":16052,"journal":{"name":"Journal of Functional Morphology and Kinesiology","volume":"10 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12193723/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CrossFit^® and Its Influence on Health Behaviors, Functional Capacity, and Psychosocial Outcomes: An Explorative Study of Gender Differences in Athlete Perspectives.","authors":"Alessandra Amato, Luca Petrigna, Leonardo Di Gregorio, Giuseppe Musumeci","doi":"10.3390/jfmk10020196","DOIUrl":"10.3390/jfmk10020196","url":null,"abstract":"<p><p><b>Objectives:</b> This explorative study aimed to evaluate athletes' perceptions of how CrossFit^® affects physical, psychological, and social well-being, exploring gender differences. CrossFit^® is a high-intensity functional training modality aimed at enhancing overall fitness and health. Limited research has explored its perceived impact on broader aspects of well-being, particularly considering gender differences. <b>Methods</b>: A total of 202 participants (age 34.3 ± 10.0 years) with at least 6 months of CrossFit^® experience completed an online self-reported questionnaire not previously published but created following published guidelines. The questions explore athletes' perceptions of their improvements in physical fitness, injury occurrence, and the effects on mental well-being. Statistical analysis included descriptive statistics and parametric and non-parametric tests to investigate gender differences. <b>Results</b>: In total, 81.2% of participants perceived improvements in strength, while 83.2% reported enhanced aerobic capacity. Significant body composition improvements were noted by 68.3% of the sample, and 87.6% reported changes in eating habits. Injury incidence was lower among women (30.2%) than men (45.3%) (<i>p</i> = 0.02). Regarding psychological outcomes, 95% of respondents indicated a reduction in stress levels, 73.3% reported better sleep quality, and over 90% perceived improvements in self-esteem and daily energy. Furthermore, 98.5% of participants formed new social connections through CrossFit^®, with 79.2% acknowledging a positive impact on social relationships. No significant gender differences were found across most psychological and social outcomes. <b>Conclusions</b>: CrossFit^® is perceived positively by participants, with similar views across genders, except for injury rates. It enhances physical fitness, mental health, and social well-being, with high training adherence and relatively low injury risk.</p>","PeriodicalId":16052,"journal":{"name":"Journal of Functional Morphology and Kinesiology","volume":"10 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12193776/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sports Massage and Blood Flow Restriction Combined with Cold Therapy Accelerate Muscle Recovery After Fatigue in Mixed Martial Arts Athletes: A Randomized Controlled Trial.","authors":"Robert Trybulski, Robert Roczniok, Gracjan Olaniszyn, Yaroslav Svyshch, Andryi Vovkanych, Michał Wilk","doi":"10.3390/jfmk10020194","DOIUrl":"10.3390/jfmk10020194","url":null,"abstract":"<p><strong>Objectives: </strong>The purpose of this study is to quantitatively evaluate the combined effects of sports massage, blood flow restriction (BFR), and cold therapy on quadriceps recovery in mixed martial arts (MMA) athletes following eccentric exercise, focusing on muscle biomechanical properties, pain, and strength.</p><p><strong>Methods: </strong>This randomized, single-blind clinical trial involved 36 men and women MMA-trained participants, divided into three groups: massage (n = 12) received massage, BFR/cool (n = 12) received combined BFR and cooling, and control (n = 12) received passive rest as a control. The fatigue protocol involved MMA fighters performing five sets of plyometric jumps on a 50 cm box until exhaustion, with 1-min breaks between sets. After that, the massage group received a 20-min massage overall using standardized techniques; BFR/cool underwent a 20-min alternating blood flow restriction (200 mmHg) and cooling treatment with ice bags on the quadriceps; and the final group served as the control group with passive rest and no intervention. Participants were assessed four times-before exercise, immediately after exercise, 24 h post-exercise (after two recovery sessions), and 48 h post-exercise (after four recovery sessions)-for perfusion unit (PU), muscle elasticity, pressure pain threshold (PPT), reactive strength index (RSI), and total quality recovery (TQR).</p><p><strong>Results: </strong>The statistical analysis revealed significant effects of both massage and BFR/cooling interventions across key recovery outcomes, with large effect sizes for time-related changes in RSI (<i>p</i> < 0.0001; η² = 0.87), elasticity (<i>p</i> < 0.0001; η² = 0.84), and PPT (<i>p</i> < 0.0001; η² = 0.66). Notably, post-exercise 48 h values for RSI, elasticity, PU, and TQR were significantly improved in both the massage and BFR/cool groups compared to control (<i>p</i> < 0.05)), while no significant group differences were observed for PPT.</p><p><strong>Conclusions: </strong>The study concludes that both massage and combined blood flow restriction with cooling interventions significantly enhance post-exercise recovery-improving muscle perfusion, elasticity, reactive strength, and perceived recovery-compared to passive rest.</p>","PeriodicalId":16052,"journal":{"name":"Journal of Functional Morphology and Kinesiology","volume":"10 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12194449/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of 12 Weeks of Interval Block Resistance Training Versus Circuit Resistance Training on Body Composition, Performance, and Autonomic Recovery in Adults: Randomized Controlled Trial.","authors":"Héctor Fuentes-Barría, Raúl Aguilera-Eguía, Juan Maureira-Sánchez, Miguel Alarcón-Rivera, Victor Garrido-Osorio, Olga Patrica López-Soto, Juan Alberto Aristizábal-Hoyos, Lissé Angarita-Davila, Diana Rojas-Gómez, Valmore Bermudez, Cherie Flores-Fernández, Ángel Roco-Videla, Jorge Enrique González-Casanova, Sebastian Urbano-Cerda, Dan Iulian Alexe","doi":"10.3390/jfmk10020195","DOIUrl":"10.3390/jfmk10020195","url":null,"abstract":"<p><p><b>Objectives:</b> Interval block resistance training (IBRT) and circuit resistance training (CRT) are periodization models aimed at enhancing neuromuscular and metabolic adaptations. This study aims to evaluate the effects of a 12-week IBRT program compared to CRT on body composition, muscle strength, speed, functional capacity, and autonomic recovery in young Chilean adults. <b>Methods:</b> A randomized, parallel, double-blind study was conducted with 30 participants assigned to IBRT (n = 15) or CRT (n = 15). Assessments included body mass index (BMI), waist circumference, right-hand grip strength, the running anaerobic sprint test (RAST), the 6 min walk test (6 MWT), and heart rate variability (HRV) indices: low-frequency to high-frequency ratio (LF/HF) and root mean square of successive differences (RMSSD, a time-domain HRV metric reflecting parasympathetic activity). Statistical analyses included <i>t</i>-tests and ANCOVA. <b>Results:</b> Groups were similar in age (IBRT: 25.2 ± 3.19; CRT: 23.27 ± 3.69, <i>p</i> = 0.14) and BMI (IBRT: 21.56 ± 2.22; CRT: 22.36 ± 1.70 kg/m², <i>p</i> = 0.40). Both groups improved significantly in waist circumference (IBRT: -1.85%; CRT: -2.37%), grip strength (IBRT: +5.47%; CRT: +4.02%), RAST (IBRT: -2.67%; CRT: -1.04%), 6 MWT (IBRT: +4.53%; CRT: +2.17%), LF/HF (IBRT: -11.43%; CRT: -5.11%), and RMSSD (IBRT: +5.36%; CRT: +3.81%) (all <i>p</i> ≤ 0.01). IBRT produced significantly greater gains in 6 MWT (B = 19.51, 95% CI: 0.79 to 38.23, <i>p</i> = 0.04). <b>Conclusions:</b> Both IBRT and CRT effectively improved body composition, muscle strength, speed, functional capacity, and autonomic recovery. However, IBRT demonstrated a superior effect on aerobic capacity.</p>","PeriodicalId":16052,"journal":{"name":"Journal of Functional Morphology and Kinesiology","volume":"10 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12194698/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"How Select Strength and Power Measures Relate to FCS Football On-Field Performance.","authors":"Seth Long, Nanette V Lopez, Jay T Sutliffe, Dierdra Bycura, Jessica R Szczepanski, Scott N Drum","doi":"10.3390/jfmk10020193","DOIUrl":"10.3390/jfmk10020193","url":null,"abstract":"<p><p><b>Objective:</b> Understanding unique ways that strength and power contribute to on-field performance in collegiate-based American football might aid coaches in recruiting and determining starters. Using retrospective analysis of existing data, including starting status (STR) and number of defensive tackles or contributing plays (CP), we sought a viable strategy to observe on-field play. Our purpose was to determine what role baseline and in-season strength, and power metrics contributed to on-field football performance (e.g., using STR and CP) from one Football Championship Subdivision (FCS) university. We hypothesized greater pre-season (baseline) and in-season (repeated variables) strength and power outcomes would lead to an increased number of STR among players (<i>n</i> = 53) as well as CP among defensive players (<i>n</i> = 30). <b>Method:</b> Power, determined through countermovement jump (CMJ) was observed weekly using a VALD Performance force deck (i.e., jump height) over a 9-week, in-season period (excluding weeks 6 and 8, a bye week, and erroneous data, respectively). Baseline measures of strength and power were also collected at the beginning of the season for each player using four specific measurements, namely the following: (a) peak vertical jump; (b) pull-ups to failure; (c) a one rep max for bench press; (d) power clean. Pearson's correlation was used to correlate baseline measures and weekly power, along with baseline measures and the total number of STR and CP each week. Additionally, linear regressions were used to examine the effects of baseline measures (vertical jump, bench press) on STR and CP. <b>Results:</b> Moderate correlations (r > 0.5) were observed between baseline variables and weekly CMJ measures. Baseline measures of power clean were correlated with CP only in week 4. All other analyses were not significant. <b>Conclusions:</b> Since our on-field performance variables were not significant, future research should focus on more potent variables, as reported in the literature, such as football IQ, initial recruiting status, and psychological resilience, in addition to accounting for strength and power metrics.</p>","PeriodicalId":16052,"journal":{"name":"Journal of Functional Morphology and Kinesiology","volume":"10 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12193737/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}