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Papers by Rogerio Guedes
Medicine & Science in Sports & Exercise, 2014
Medicine & Science in Sports & Exercise, 2014
A successful kicking game is an important component in American Football (AF). A good placekicker... more A successful kicking game is an important component in American Football (AF). A good placekicker can be among a team's scoring leaders. PURPOSE: The focus of this investigation was to identify the most important biomechanical factors associated with kicking a field goal (FG) in AF based on input from AF kicking coaches. METHODS: A literature review was conducted on the biomechanics of kicking. Based on the review, an online survey was developed listing sixteen (16) factors associated with the kicking motion. Each participant (coach) was asked to select and rank the five factors considered to be the most important for FG success. The survey included an option allowing respondents to list additional factors. RESULTS: Based on the individual results, a consensus analysis model was used to identify the most important biomechanical factors associated with kicking a FG in AF as identified by coaches. The top five biomechanical factors are, in rank order based on points, hip position at ball contact (28), plant foot position (25), kicking leg ankle lock (23), angle of kicking foot (22), and torso position at ball contact (18). All other factors scored 9 or fewer points. With the least important three factors being ground reaction force (0), kicking side-arm position (0), and lower body angle (0). Only one coach provided unique factors. Biomechanical interpretation of factors for future research is also provided. CONCLUSIONS: Future 3D motion analysis on FG kicking is appropriate and should include the five most important factors.
Isokinetics and Exercise Science, 2016
BACKGROUND: Kinesiotaping (KT) has become popular among athletic trainers and physical therapists... more BACKGROUND: Kinesiotaping (KT) has become popular among athletic trainers and physical therapists. Most of KT studies investigated only the immediate responses, and only a few evaluated the long-term effects. OBJECTIVES: To evaluate the effects of 48 hours of KT on knee extensor performance of healthy subjects during isokinetic exercise at different muscle action velocities. METHODS: Twenty six healthy men were enrolled and the study presented a drop-out rate of 19%. Participants were randomly allocated to one of two intervention groups: 1. KT with the tape applied for activation of rectus femoris with 40% tension 2. Control (CO) with the tape applied on rectus femoris without tension. Measurements were collected at baseline (BL) without KT, immediately (T0) post KT application, and 24 h (T24) and 48 h (T48) after KT application. The main outcome measures were Knee extension peak torque (PT), load range (LR) and time to reach the PT (TPT). RESULTS: There were no significant differences between KT and CO for PT, LR or TPT at 60 or 240 • /s, and no significant differences on time (BL, IMD, 24 h and 48 h) for both groups. CONCLUSION: Kinesiotaping did not enhance knee extensor neuromuscular performance of healthy men at different muscle action velocities. An important finding was that the continued use of the Kinesiotaping (48 h) did not influence muscle performance.
Medicine & Science in Sports & Exercise, 2014
Medicine & Science in Sports & Exercise, 2014
A successful kicking game is an important component in American Football (AF). A good placekicker... more A successful kicking game is an important component in American Football (AF). A good placekicker can be among a team's scoring leaders. PURPOSE: The focus of this investigation was to identify the most important biomechanical factors associated with kicking a field goal (FG) in AF based on input from AF kicking coaches. METHODS: A literature review was conducted on the biomechanics of kicking. Based on the review, an online survey was developed listing sixteen (16) factors associated with the kicking motion. Each participant (coach) was asked to select and rank the five factors considered to be the most important for FG success. The survey included an option allowing respondents to list additional factors. RESULTS: Based on the individual results, a consensus analysis model was used to identify the most important biomechanical factors associated with kicking a FG in AF as identified by coaches. The top five biomechanical factors are, in rank order based on points, hip position at ball contact (28), plant foot position (25), kicking leg ankle lock (23), angle of kicking foot (22), and torso position at ball contact (18). All other factors scored 9 or fewer points. With the least important three factors being ground reaction force (0), kicking side-arm position (0), and lower body angle (0). Only one coach provided unique factors. Biomechanical interpretation of factors for future research is also provided. CONCLUSIONS: Future 3D motion analysis on FG kicking is appropriate and should include the five most important factors.
Isokinetics and Exercise Science, 2016
BACKGROUND: Kinesiotaping (KT) has become popular among athletic trainers and physical therapists... more BACKGROUND: Kinesiotaping (KT) has become popular among athletic trainers and physical therapists. Most of KT studies investigated only the immediate responses, and only a few evaluated the long-term effects. OBJECTIVES: To evaluate the effects of 48 hours of KT on knee extensor performance of healthy subjects during isokinetic exercise at different muscle action velocities. METHODS: Twenty six healthy men were enrolled and the study presented a drop-out rate of 19%. Participants were randomly allocated to one of two intervention groups: 1. KT with the tape applied for activation of rectus femoris with 40% tension 2. Control (CO) with the tape applied on rectus femoris without tension. Measurements were collected at baseline (BL) without KT, immediately (T0) post KT application, and 24 h (T24) and 48 h (T48) after KT application. The main outcome measures were Knee extension peak torque (PT), load range (LR) and time to reach the PT (TPT). RESULTS: There were no significant differences between KT and CO for PT, LR or TPT at 60 or 240 • /s, and no significant differences on time (BL, IMD, 24 h and 48 h) for both groups. CONCLUSION: Kinesiotaping did not enhance knee extensor neuromuscular performance of healthy men at different muscle action velocities. An important finding was that the continued use of the Kinesiotaping (48 h) did not influence muscle performance.