scholarly journals Relationship Between Toe Muscular Strength and the Ability to Change Direction in Athletes

2018 ◽  
Vol 64 (1) ◽  
pp. 47-55 ◽  
Author(s):  
Yasuhiro Yuasa ◽  
Toshiyuki Kurihara ◽  
Tadao Isaka
Keyword(s):  
Muscular Strength ◽  
Metatarsophalangeal Joint ◽  
American Football ◽  
Football Players ◽  
Test Results ◽  
Change Of Direction ◽  
Change Direction ◽  
Toe Flexor Strength ◽  
The Relationship ◽  
Flexor Strength

Abstract This study aimed to investigate the relationship between toe muscular strength and the ability to change direction in athletes. Seventeen collegiate American-football players participated in the study (age 19.9 ± 0.9 years, competition experience 7.3 ± 1.7 years). Two types of measurements were performed to evaluate toe muscular strength: toe flexor strength with the metatarsophalangeal joint in the planter flexed position and toe-pushing force with the metatarsophalangeal joint in the dorsiflexed position. The ability to change direction was evaluated using the pro-agility and 3-cone tests and change of direction deficits, calculated by subtracting the sprint times from the pro-agility and 3-cone times. There were significant correlations between toe-pushing force and the results of the pro-agility and 3-cone tests, but no significant correlations between toe flexor strength and the pro-agility and 3-cone tests. Neither toe-pushing force nor toe flexor strength was significantly correlated with the sprint test results. Furthermore, toe-pushing force was significantly correlated with the 3-cone test deficit, but toe flexor strength was not. The ability to change direction is more strongly affected by toe muscular strength (measured as toe-pushing force) with the metatarsophalangeal joint in the dorsiflexed angle than by toe muscular strength (measured as toe flexor strength) with the metatarsophalangeal joint in the plantar flexed angle. Our results suggest that athletes can improve their ability to change direction with toe muscular strength training with the metatarsophalangeal joint in the dorsiflexed position.

Physical and performance characteristics related to starter status, position, and division in Japanese collegiate American-football players

2021 ◽  
pp. 1-8
Author(s):  
Junta Iguchi ◽  
Minoru Matsunami ◽  
Tatsuya Hojo ◽  
Yoshihiko Fujisawa ◽  
Kenji Kuzuhara ◽  
...  
Keyword(s):  
Performance Test ◽  
Vertical Jump ◽  
American Football ◽  
Football Players ◽  
Jump Height ◽  
Test Results ◽  
Repetition Maximum ◽  
Vertical Jump Height ◽  
Division 1 ◽  
And Performance

BACKGROUND: Few studies have investigated the variations in body composition and performance in Japanese collegiate American-football players. OBJECTIVE: To clarify what characterizes competitors at the highest levels – in the top division or on the starting lineup – we compared players’ body compositions and performance test results. METHODS: This study included 172 players. Each player’s body composition and performance (one-repetition maximum bench press, one-repetition maximum back squat, and vertical jump height) were measured; power was estimated from vertical jump height and body weight. Players were compared according to status (starter vs. non-starter), position (skill vs. linemen), and division (1 vs. 2). Regression analysis was performed to determine characteristics for being a starter. RESULTS: Players in higher divisions and who were starters were stronger and had more power, greater body size, and better performance test results. Players in skill positions were relatively stronger than those in linemen positions. Vertical jump height was a significant predictor of being a starter in Division 1. CONCLUSION: Power and vertical jump may be a deciding factor for playing as a starter or in a higher division.

Effect of Turf Toe on Foot Contact Pressures in Professional American Football Players

2009 ◽  
Vol 30 (5) ◽  
pp. 405-409 ◽  
Author(s):  
Robert H. Brophy ◽  
Seth C. Gamradt ◽  
Scott J. Ellis ◽  
Ronnie P. Barnes ◽  
Scott A. Rodeo ◽  
...  
Keyword(s):  
Body Mass Index ◽  
National Football League ◽  
Peak Pressure ◽  
American Football ◽  
Football Players ◽  
Plantar Pressures ◽  
History Of ◽  
Turf Toe ◽  
The Relationship ◽  
Contact Pressures

Background: The relationship between turf toe and plantar foot pressures has not been extensively studied. Two hypotheses were tested in a cohort of professional American football players: first, that a history of turf toe is associated with increased peak hallucal and first metatarsophalangeal (MTP) plantar pressures; second, that decreased range of motion (ROM) of the first MTP correlates with increased peak hallucal and first MTP plantar pressures. Materials and Methods: Forty-four athletes from one National Football League (NFL) team were screened for a history of turf toe during preseason training. Dorsal passive MTP ROM and dynamic plantar pressures were measured in both feet of each player. Anatomical masking was used to assess peak pressure at the first MTP and hallux. Results: First MTP dorsiflexion was significantly lower in halluces with a history of turf toe (40.6 ± 15.1 degrees versus 48.4 ± 12.8 degrees, p = 0.04). Peak hallucal pressures were higher in athletes with turf toe (535 ± 288 kPa versus 414 ± 202 kPa, p = 0.05) even after normalizing for athlete body mass index ( p = 0.0003). Peak MTP pressure was not significantly different between the two groups tested. First MTP dorsiflexion did not correlate with peak hallucal or first MTP pressures. Conclusion: This study showed that turf toe is associated with decreased MTP motion. In addition, increased peak hallucal pressures were found. Further study is warranted to determine whether these pressures correlate with the severity of symptoms or progression of turf toe to first MTP arthritis.

THE RELATIONSHIP BETWEEN REPETITIVE HEAD IMPACT EXPOSURE AND CHRONIC TRAUMATIC ENCEPHALOPATHY IN AMERICAN FOOTBALL PLAYERS

2017 ◽  
Vol 13 (7) ◽  
pp. P1469-P1470
Author(s):  
Jesse Mez ◽  
Daniel H. Daneshvar ◽  
Bobak Abdolmohammadi ◽  
Patrick T. Kiernan ◽  
Michael L. Alosco ◽  
...  
Keyword(s):  
Chronic Traumatic Encephalopathy ◽  
Head Impact ◽  
American Football ◽  
Football Players ◽  
The Relationship

scholarly journals Interlimb asymmetry thresholds that negatively affect change of direction performance in collegiate American football players

2020 ◽  
Author(s):  
Nicolas Philipp ◽  
Derek Crawford ◽  
Matthew Garver ◽  
Dustin Davis ◽  
Josie Hair
Keyword(s):  
Peak Power ◽  
Operating Characteristic ◽  
Average Power ◽  
Roc Curves ◽  
Sport Performance ◽  
American Football ◽  
Football Players ◽  
Strength And Conditioning ◽  
Impact Performance ◽  
Change Of Direction

Purpose: Investigations into the effects of interlimb asymmetries on different aspects of sport performance have been of increased interest to researchers and strength and conditioning practitioners over the past couple of years. Interlimb asymmetries have been found to negatively impact performance in key performance indicators (KPI) such as jumping, sprinting, and changing directions, within various sports populations. However, there is no consensus with regard to a meaningful threshold at which asymmetries start to negatively impact KPIs or performance. The aim of this study was to investigate a potentially meaningful threshold for three asymmetry metrics (mean peak velocity (mPV), mean peak power (mPP), mean average power (mAP)) that were extracted from the Bulgarian split squat and found to be significantly related to change of direction performance (via L-drill test) within a sample of collegiate American football players. Methods: We used receiver operating characteristic (ROC) curves to identify asymmetry thresholds for all metrics that discriminate between faster and slower performers in the L-drill. Results: Asymmetry thresholds of greater than 10.65% (mAP), 14.59% (MPP), and 14.96% (mPV) were the thresholds identified by ROC curves as approximately 15% for both metrics, whereby players with asymmetries over this threshold were more likely to be classified as low performers. Conclusion: These findings may be helpful for practitioners interested in screening athletes for interlimb asymmetries that may negatively impact their change of direction performance.

Effects of Toe Flexor Strength on Forefoot Loading During Unanticipated Side-step Cutting in Football Players

2015 ◽  
Vol 47 ◽  
pp. 794
Author(s):  
Kaitlyn E. Wright ◽  
Anh-Dung Nguyen ◽  
Andrea L. Baellow ◽  
Allison K. Arpante ◽  
Jeffrey B. Taylor ◽  
...  
Keyword(s):  
Football Players ◽  
Toe Flexor Strength ◽  
Flexor Strength

scholarly journals Sports Level and the Personality of American Football Players in Poland

2021 ◽  
Vol 18 (24) ◽  
pp. 13026
Author(s):  
Paweł Piepiora ◽  
Damian Kwiatkowski ◽  
Justyna Bagińska ◽  
Dimitris Agouridas
Keyword(s):  
Big Five ◽  
Divergent Thinking ◽  
Openness To Experience ◽  
American Football ◽  
Football Players ◽  
Big Five Personality ◽  
Personality Questionnaire ◽  
Personality Tests ◽  
Football Clubs ◽  
The Relationship

Research on personality in sport is very popular as it allows prediction of the behavior of players in the starting situation. Hence, verifications of players due to their sports level may turn out to be crucial. Due to the dynamic development of American football in Poland, we undertook research to verify the relationship between the sports level and the personality of these players. The Big Five personality study that we carried out involved players aged from 20 to 29—the representatives of American football clubs in Poland (N = 140) from three league games levels: LFA 1 (n = 75), LFA 2 (n = 40), and LFA 9 (n = 25). The NEO-FFI personality questionnaire was used as a research tool. The players from the top-level games were characterized by their openness to experience, the level of which decreases along with the decrease in the players’ sports levels. The differences in openness to experience were revealed, first of all, in divergent thinking and creativity. It was ascertained that openness to experience is a characteristic personality trait for American football players in Poland. Therefore, systematic conduct of personality tests among American football players in Poland, in the process of selecting candidates for the highest levels of football competition, would be recommended. This might significantly affect the development of the sports level of this discipline in Poland. The obtained results of research on personality may, moreover, prove to be useful in selecting players and improving the predictions of important sports behaviors in American football in Poland.

Anthropometric and Athletic Performance Combine Test Results Among Positions Within Grade Levels of High School–Aged American Football Players

2018 ◽  
Vol 32 (5) ◽  
pp. 1288-1296 ◽  
Author(s):  
Todd J. Leutzinger ◽  
Zachary M. Gillen ◽  
Amelia M. Miramonti ◽  
Brianna D. McKay ◽  
Alegra I. Mendez ◽  
...  
Keyword(s):  
High School ◽  
Athletic Performance ◽  
American Football ◽  
Football Players ◽  
Test Results ◽  
Grade Levels ◽  
Combine Test

Association Between Toe Flexor Strength and Activity Levels in Community-Dwelling Japanese Older Women

2020 ◽  
Vol 28 (3) ◽  
pp. 360-364
Author(s):  
Mieko Yokozuka ◽  
Chie Miki ◽  
Makoto Suzuki ◽  
Rieko Katsura
Keyword(s):  
Muscle Strength ◽  
Older Women ◽  
Daily Activity ◽  
Community Dwelling ◽  
Activity Levels ◽  
Flexor Muscle ◽  
Toe Flexor Strength ◽  
The Relationship ◽  
Spearman’S Correlation ◽  
Flexor Strength

This study aimed to explore the relationship between toe flexor strength and the daily activity levels in 56 Japanese older women aged between 70 and 88 years. The activity levels were measured as the average number of steps/day using a pedometer and the life space assessment (LSA) scores. The Mann–Whitney U test was used to compare toe flexor muscle strength and the LSA scores between those with fewer than and more than 6,000 steps/day. Spearman’s correlation coefficient was used to investigate the relationship between toe grip strength according to age and each variable. The LSA scores were significantly higher in the group with >6,000 steps/day (β = 0.188, p < .05). A correlation was found between the number of steps/day and toe flexor strength (r = .424, β = 0.419, p < .05) and the LSA scores (r = .417, β = 0.435, p < .05) in the participants in their 80s. Increasing the number of steps/day may benefit women in their 80s.

scholarly journals The relationship between self-presentation concerns and pre-game affect among adolescent American football players

2013 ◽  
Vol 2 (3) ◽  
pp. 168-175 ◽  
Author(s):  
Leslie Podlog ◽  
Marc Lochbaum ◽  
Jens Kleinert ◽  
James Dimmock ◽  
Maria Newton ◽  
...  
Keyword(s):  
American Football ◽  
Football Players ◽  
Self Presentation ◽  
The Relationship
Sign in / Sign up

Export Citation Format

Share Document