EFFECT OF LINEAR VS BLOCK PERIODIZATION OF HIGH INTENSITY TRAINING EXERCISE PROGRAM ON KICKING VELOCITY AND EXPLOSIVE POWER IN SEMIPROFESSIONAL TAEKWONDO PLAYERS A RANDOMIZED CONTROLLED TRIAL INTRODUCTION Taekwondo is a fast paced fighting sport that demands extraordinary levels of neuromuscular coordination explosive power and technical accuracy. Maintaining tactical supremacy during competition and landing successful scoring tactics depend on the capacity to produce high kicking velocity. Training regimens must be carefully designed to maximize performance improvements while lowering the danger of overtraining and injury when players reach higher skill levels. A fundamental concept in strength and conditioning periodization is the deliberate and methodical change of training variables over time including volume intensity frequency and exercise choice. Maximizing performance adaptations while reducing the risk of overtraining and injury is the main goal of periodization. Athletes can develop particular physical attributes gradually and reach their peak at crucial moments like major events by structuring their training into phases. Periodized training is typically broken down into three categories macrocycles long term planning mesocycles many weeks to months and microcycles weekly plans. Each cycle is intended to target certain adaptations such as strength power speed and skills unique to a particular activity. Linear periodization and block periodization are two of the most often utilized periodization models in athletic training especially in strength and conditioning studies. A steady transition from high training volume and low intensity to reduced volume and higher intensity is the hallmark of linear periodization also known as classical periodization. Before moving on to maximal strength and eventually sport specific power and speed development this method often aims to build a strong foundation of general fitness and muscular endurance. Block periodization on the other hand divides training into distinct blocks each of which focuses primarily on the development of a specific physical attribute such as power maximal strength or hypertrophy. In order for the adaptations created in one phase to support and improve performance in later phases these blocks are arranged strategically. It is believed that block periodizations concentrated training stimuli encourage more targeted and effective adaptations especially in skilled or competitive athletes. Both linear and block periodization models may be useful for semi professional Taekwondo athletes whose success mostly depends on quick lower limb force output and high velocity kicking actions. When compared to non periodized training methods evidence from other sports populations indicates that structured periodized training regimens result in larger gains in strength and power. Nevertheless despite Taekwondos physical demands there is still a dearth of study specifically looking at the use of organized periodization models in this discipline. Isolated case studies such as a collegiate Taekwondo program using a 20 week linear periodization model that advanced from general conditioning to strength and explosive power development are examples of the evidence now available. However there are few thorough experimental trials using exacting technique. It is commonly acknowledged that lower limb explosive force and kicking velocity are important factors in Taekwondo competition success. Increased impact forces and increased scoring potential during competition are linked to faster kicking speeds. Elastic resistance training is one sport specific resistance technique that has been shown to dramatically increase roundhouse kick velocity in a comparatively short training session. Further research has shown that frequent Taekwondo practice mixed with elastic resistance training improves kicking velocity and impact quality especially in young athletes. Significant correlations between hip and knee isokinetic strength and kicking velocity have been found in research looking at the relationship between lower limb strength and kicking performance. These findings highlight how crucial neuromuscular coordination and muscular strength are for performing quick forceful kicks. Therefore a key physical attribute supporting successful kicking performance is explosive power which is defined as the capacity to produce high levels of force in a brief amount of time. Since the international governing organization World Taekwondo implemented electronic scoring methods Taekwondos technical and competitive standards have evolved. The sport is a complex physical challenge because it requires strong lower limb strikes agility quick footwork great aerobic and anaerobic capacity flexibility and balance. These technological and regulatory innovations have affected the dynamics of competition athlete conduct and possibly injury patterns. Top international Taekwondo competitors typically have low body fat a lean somatotype and a body composition that favors musculoskeletal lean mass over excess fat according to studies. Taekwondo athletes require both aerobic capacity for sustaining fights and recovering between rounds and anaerobic power especially in the lower limbs for kicks and explosive actions. Taekwondo sessions have been associated with improvements in body composition lower body fat higher muscle mass and with consistent practice potential protection against metabolic hazards in addition to improving physical performance. A pooled analysis of observational studies conducted before 2008 revealed an overall injury rate of about 79.3 per 1000 athlete exposures more recent data on high performance elite athletes still shows a significant injury incidence depending on study design and exposure metric. The lower limbs foot knee and ankle sustain the great bulk of injuries. These injuries which include contusions sprains strains and ligament injuries are usually caused by direct contact during kicks or collisions. For instance in a national study of Taekwondo practitioners in Portugal 38.7 percent said they had been harmed at least once since they started practicing and 22.3 percent said they had been hurt in the previous year alone. Muscle contusions and strains particularly in the lower limbs were the most frequent injuries. Furthermore turning kicks accounted for a large percentage of injuries in elite competition tests and inadequate blocking or defense abilities were found to be a major contributing reason. In a major worldwide cohort research involving 936 participants from 145 countries most injuries were caused by contact between athletes with lower extremities accounting for a large percentage and contusions or hematomas being the most common. These findings imply that although Taekwondo offers numerous health and physical advantages there is a considerable risk of acute injuries particularly when training and competition loads are high. Despite these encouraging results well controlled long term periodized training regimens have not consistently looked at sport specific performance outcomes like kicking velocity. This is particularly true for research using traditional resistance training techniques like structured plyometric programs and free weight training. The existing literature still has a number of significant research gaps. First there are not many direct comparative studies that look at how different periodization models especially linear versus block periodization affect Taekwondo players lower limb explosive strength and kicking ability. Second most of the research that is currently available focuses on alternative training techniques with little attention paid to traditional strength training regimens organized within a precise periodized framework. Lastly a lot of the research has been done on young or college populations which limits the applicability to semi professional or elite Taekwondo athletes. NEED OF STUDY In Taekwondo kicking velocity and explosive lower limb power are important performance factors that directly impact scoring potential and competitive success. Periodization plays a central role in structuring high intensity training by systematically manipulating training variables to maximize performance while minimizing overtraining and injury. Among the various models linear periodization is traditionally favored for its simplicity and progressive overload whereas block periodization has gained attention for its concentrated loading and targeted development. Previous literature comparing linear and block periodization in Taekwondo is limited and lacks clear comparative data. Coaches often rely on personal preference rather than evidence based programming. Determining whether linear or block periodization offers better gains can help maximize performance results reduce injury risk and improve athlete preparedness. RESEARCH QUESTION Will there be any significant difference in kicking velocity and explosive power between linear and block periodization high intensity training exercise program methods in semiprofessional Taekwondo players over 8 weeks AIM To determine the effectiveness of a linear versus block periodization model of high intensity training on kicking velocity and explosive power in competitive semiprofessional Taekwondo athletes OBJECTIVES - To determine the effectiveness of linear and block periodization on kicking velocity using a high speed video system
- To determine the effectiveness on explosive power using countermovement jump test
- To compare effectiveness between both models
HYPOTHESES Null Hypothesis H0
There will be no significant difference in kicking velocity and explosive power between linear and block periodization methods Alternative Hypothesis H1
There will be a significant difference in kicking velocity and explosive power between linear and block periodization methods METHODOLOGY Source of Data Samarth Sports Academy
Study Setting Samarth Sports Academy
Study Type Experimental study
Study Design Single blinded randomized controlled trial
Study Duration 2 years
Protocol Duration 8 weeks
Sample Size 60
Sampling Method Simple randomized sampling
Study Population Semiprofessional Taekwondo athletes SELECTION CRITERIA Inclusion Criteria Age 18 to 25 years All genders Regular training at least 3 sessions Willing to participate Able to commit to schedule Exclusion Criteria Participation in other strength studies Psychological instability Use of performance enhancing drugs Current injury Acute illness MATERIALS Session RPE scale Informed consent forms Data recording sheets Patient information brochure EQUIPMENTS Measuring tape Marking cones Jump mat Stopwatch Plyometric boxes Agility ladders Stadiometer Weighing scale PROCEDURE Study design will be prepared and ethical clearance will be obtained from the IEC. The Participants will be selected based on the inclusion and exclusion criteria for eligibility. Informed consent will be obtained from the participants and demographic data is recorded. Participants will be randomly divided with standard method and will be allocated to 3 groups that is experimental group n ill be 20 , Experimental group n will be 20 And control exercise group n will be 20Prior assessment of the participants will be done. Group A will be Experimental group and group B will be control group and group c will be conventional physiotherapy Experimental group will be administered with Block periodization model for taekwondo players and group B will be administered with linear periodization model for taekwondo athletes and control group will administer conventional physiotherapy exercise program All the instructions will be given verbally, provided proper demonstration and guidance to the participants. The participants will be given exercise regimen and administered to perform 1 hr one session per day for 4 days in a week for 12 weeks. The selective variables like single leg hop test, questionnaires will be measured at week 0 week 6 and week 12. Statistical analysis will be done and the results with the conclusion will be mentioned OUTCOME MEASURES Primary Explosive power single leg hop test countermovement jump Kicking accuracy high speed system Secondary Dynamic postural control INTERVENTION Block Periodization Model Group A Accumulation Phase Weeks 1 to 4
Transmutation Phase Weeks 4 to 8
Realization Phase Weeks 9 to 12 The accumulation phase focuses on aerobic endurance movement efficiency core stability balance and flexibility with low to moderate intensity and high training volume. Exercises included circuit strength training continuous running high volume kicking drills core stabilization exercises lower limb strengthening balance training and daily flexibility exercises. The transmutation phase emphasized maximal strength and anaerobic conditioning with moderate to high intensity and moderate volume. Training included heavy squats and deadlifts plyometric drills sprint and shuttle intervals counterattack practice controlled sparring and core stability exercises. The realization phase focused on speed power and performance readiness with high to very high intensity and reduced volume. Exercises included speed kicking drills plyometric kicks tactical sparring light strength maintenance training flexibility exercises and mental rehearsal or visualization techniques. Linear Periodization Model The linear periodization program was conducted for 12 weeks progressing gradually from low to high intensity training. General Preparation Phase Weeks 1 to 4
Focused on developing aerobic capacity strength endurance and technical skill practice. Training included circuit strength training continuous running high volume kick repetitions core stability exercises and daily flexibility training at low to moderate intensity. Strength Development Phase Weeks 4 to 8
Increased training intensity to moderate to high levels while maintaining moderate volume. Exercises included heavy squats deadlifts plyometric kicking drills anaerobic sprint intervals counterattack drills controlled sparring and core strengthening exercises. Power and Competition Phase Weeks 9 to 12
Emphasized speed power and tactical readiness. Training consisted of speed kicking drills plyometric kicks tactical sparring light strength maintenance exercises mental rehearsal strategies and daily flexibility training. Conventional Physiotherapy Exercise Program The control group followed a conventional physiotherapy exercise program throughout the intervention period. Each session began with a 10 minute warm up including light aerobic exercises and mobility exercises. The main exercise session consisted of basic lower limb strengthening exercises such as squats and forward lunges along with Taekwondo specific drills performed at controlled intensity including slow front kicks roundhouse kicks at submaximal speed and shadow kicking without resistance. Each session ended with a 5 minute cool down which included light walking and static stretching exercises for the lower limb and trunk muscles to promote recovery and maintain flexibilit |