**Contents**

Physical Characteristics and Physical Fitness Profiles of Korean Taekwondo Athletes: A Systematic Review

Reprinted from: *Int. J. Environ. Res. Public Health* **2021**, *18*, 9624, doi:10.3390/ijerph18189624 . . . **97**

#### **I-Lin Wang, Li-I Wang, Yang Liu, Yu Su, Shun Yao and Chun-Sheng Ho**

Application of Real-Time Visual Feedback System in Balance Training of the Center of Pressure with Smart Wearable Devices

Reprinted from: *Int. J. Environ. Res. Public Health* **2021**, *18*, 9637, doi:10.3390/ijerph18189637 . . . **115**

#### **Karoly Dobos, Dario Novak and Petar Barbaros**

Neuromuscular Fitness Is Associated with Success in Sport for Elite Female, but Not Male Tennis Players

Reprinted from: *Int. J. Environ. Res. Public Health* **2021**, *18*, 6512, doi:10.3390/ijerph18126512 . . . **125**

#### **Chin-Yi Gu, Xiang-Rui Li, Chien-Ting Lai, Jin-Jiang Gao, I-Lin Wang and Li-I Wang**

Sex Disparity in Bilateral Asymmetry of Impact Forces during Height-Adjusted Drop Jumps Reprinted from: *Int. J. Environ. Res. Public Health* **2021**, *18*, 5953, doi:10.3390/ijerph18115953 . . . **135**

#### **Wiesław Błach, Łukasz Rydzik, Łukasz Błach, Wojciech J. Cynarski, Maciej Kostrzewa and Tadeusz Ambrozy˙**

Characteristics of Technical and Tactical Preparation of Elite Judokas during the World Championships and Olympic Games Reprinted from: *Int. J. Environ. Res. Public Health* **2021**, *18*, 5841, doi:10.3390/ijerph18115841 . . . **145**

**Wojciech J. Cynarski, Jan Słopecki, Bartosz Dziadek, Peter B ¨oschen and Paweł Piepiora** Indicators of Targeted Physical Fitness in Judo and Jujutsu—Preliminary Results of Research Reprinted from: *Int. J. Environ. Res. Public Health* **2021**, *18*, 4347, doi:10.3390/ijerph18084347 . . . **155**

#### **Alex Ojeda-Aravena, Tom ´as Herrera-Valenzuela, Pablo Vald´es-Badilla, Jorge Cancino-L ´opez, Jos ´e Zapata-Bastias and Jos´e Manuel Garc´ıa-Garc´ıa**

Effects of 4 Weeks of a Technique-Specific Protocol with High-Intensity Intervals on General and Specific Physical Fitness in Taekwondo Athletes: An Inter-Individual Analysis Reprinted from: *Int. J. Environ. Res. Public Health* **2021**, *18*, 3643, doi:10.3390/ijerph18073643 . . . **165**

#### **Rafel Cirer-Sastre, Francisco Corbi, Isaac L ´opez-Laval, Luis Enrique Carranza-Garc´ıa and Joaqu´ın Reverter-Masi `a**

Exercise-Induced Release of Cardiac Troponins in Adolescent vs. Adult Swimmers Reprinted from: *Int. J. Environ. Res. Public Health* **2021**, *18*, 1285, doi:10.3390/ijerph18031285 . . . **183**

**Łukasz Rydzik, Tadeusz Ambrozy, Zbigniew Obmi ´ ˙ nski, Wiesław Błach and Ibrahim Ouergui** Evaluation of the Body Composition and Selected Physiological Variables of the Skin Surface Depending on Technical and Tactical Skills of Kickboxing Athletes in K1 Style Reprinted from: *Int. J. Environ. Res. Public Health* **2021**, *18*, 11625, doi:10.3390/ijerph182111625 . **189**

#### **Joanna M. Bukowska, Małgorzata Jekiełek, Dariusz Kruczkowski, Tadeusz Ambrozy and ˙ Jarosław Jaszczur-Nowicki**

Biomechanical Aspects of the Foot Arch, Body Balance and Body Weight Composition of Boys Training Football

Reprinted from: *Int. J. Environ. Res. Public Health* **2021**, *18*, 5017, doi:10.3390/ijerph18095017 . . . **205**

#### **Łukasz Rydzik and Tadeusz Ambrozy˙**

Physical Fitness and the Level of Technical and Tactical Training of Kickboxers Reprinted from: *Int. J. Environ. Res. Public Health* **2021**, *18*, 3088, doi:10.3390/ijerph18063088 . . . **217**


**Author details**

Nuri Mamak *Department of Internal Medicine, Faculty of Veterinary Medicine, University of Mehmet Akif Ersoy, Turkey*

İsmail Aytekin *Department of Internal Medicine, Faculty of Veterinary Medicine, University of Balikesir, Turkey*