Apostolos Theos

Associate Professor in Sports Medicine

Director Umeå School of Sport Sciences

Teaching and Researching in the field of Exercise Physiology

0000-0001-8191-6659

Contact

apostolos.theos@umu.se

+46 90 786 66 19

Works as

Associate professor at Department of Community Medicine and Rehabilitation Section: Sports Medicine

Biologihuset hus C, plan 6, Umeå universitet, Avdelningen för Idrottsmedicin Umeå universitet, 901 87 Umeå

Affiliated as other position at Umeå School of Sport Sciences Role: Director

IKSU Sport, Gösta Skogslunds Väg 35, Idrottshögskolans kansli Umeå universitet, 901 87 Umeå

Since 2025, I have been the Director of the School of Sport Sciences. Previously, I served as Head of the Section of Sports Medicine for ten years and as Deputy Head of the Department of Community Medicine and Rehabilitation for three years.

I teach exercise physiology at both undergraduate and advanced levels, with a particular focus on children and exercise, testing methodology, and muscle physiology.

My research focuses on the effects of exercise on hormonal and metabolic variables in children, as well as on the development and application of physiological tests to predict performance in elite athletes.

I earned my PhD in December 2012 from the University of Athens, Greece, in the field of molecular exercise physiology.

Factors associated with muscle strength in 10–16-year-old trained male children and adolescents

BMC Sports Science, Medicine and Rehabilitation, BioMed Central (BMC) 2025, Vol. 17, (1)

Jansson, Daniel; Domellöf, Magnus; Andersson, Helena; et al.

Hormonal and inflammatory responses in prepubertal vs. pubertal male children following an acute free-weight resistance training session

European Journal of Applied Physiology, Springer Nature 2025, Vol. 125, (2) : 381-392

Jansson, Daniel; Lundberg, Elena; Rullander, Anna-Clara; et al.

Cortisol and β-endorphin responses during a two-month exercise training program in patients with an opioid use disorder and on a substitution treatment

International Journal of Molecular Sciences, MDPI 2025, Vol. 26, (11)

Psarianos, Alexandros E.; Philippou, Anastassios; Papadopetraki, Argyro; et al.

Dietary intake of soccer players before, during and after an official game: influence of competition level and playing position

Nutrients, MDPI 2024, Vol. 16, (3)

Chryssanthopoulos, Costas; Souglis, Athanasios; Tsalouhidou, Sofia; et al.

Differences in physiological responses between two repeated sprint protocols in female soccer players

International Journal of Exercise Science, Western Kentucky University 2024, Vol. 17, (6) : 1605-1617

Hörnlund, Emma; Hadjispyrou, Spyridon; Theos, Apostolos

Predicting competitive alpine skiing performance by multivariable statistics: the need for individual profiling

Frontiers in Sports and Active Living, Frontiers Media S.A. 2024, Vol. 6

Nilsson, Robert; Theos, Apostolos; Lindberg, Ann-Sofie; et al.

Young artistic gymnasts drink ad libitum only half of their fluid lost during training, but more fluid intake does not influence performance

Nutrients, MDPI 2023, Vol. 15, (12)

Chryssanthopoulos, Costas; Dallas, Georgios; Arnaoutis, Giannis; et al.

Mitochondrial dysfunction and sarcopenic obesity: the role of exercise

Journal of Clinical Medicine, MDPI 2023, Vol. 12, (17)

Hadjispyrou, Spyridon; Giannopoulos, Antonios; Philippou, Anastassios; et al.

Effects of COVID-19 on physical activity and mood in the middle-aged people: Concerns and strategies

Turkish Journal of Sports Medicine, Turkish Spors Medicine Association 2022, Vol. 57, (1) : 38-43

Aghababa, Alireza; Rohani, Hadi; Nabilpoor, Maghsood; et al.

Effects of Resistance and Endurance Training Alone or Combined on Hormonal Adaptations and Cytokines in Healthy Children and Adolescents: A Systematic Review and Meta-analysis

Sports Medicine - Open, Springer 2022, Vol. 8, (1)

Jansson, Daniel; Lindberg, Ann-Sofie; Lundberg, Elena; et al.

Oxygen Uptake in Repeated Cycling Sprints Against Different Loads Is Comparable Between Men and Preadolescent Boys

Frontiers in Physiology, Frontiers Media S.A. 2022, Vol. 13

Theos, Apostolos; Bogdanis, Gregory C.; Jansson, Daniel; et al.

Effects of core strength training on skiing economy in elite junior cross-country skiers

Research Quarterly for Exercise and Sport, Routledge 2022, Vol. 93, (3) : 608-614

Therell, Terese; Jansson, Daniel; Theos, Apostolos

Effects of Different Types of Lower Body Resistance Exercise on Upper-body Strength in Men and Women, with Special Reference to Anabolic Hormones

International Journal of Exercise Science, Western Kentucky University 2021, Vol. 14, (3) : 1052-1069

Jakobsson, Johan; Theos, Apostolos; Malm, Christer B.

Effects of Different Types of Lower Body Resistance Exercise on Upper-body Strength in Men and Women, with Special Reference to Anabolic Hormones

International Journal of Exercise Science, Western Kentucky University 2021, Vol. 14, (3) : 1052-1069

Jakobsson, Johan; Theos, Apostolos; Malm, Christer B.

Lack of Predictive Power in Commonly Used Tests for Performance in Alpine Skiing

Sports Medicine International Open, Georg Thieme Verlag KG 2021, Vol. 5, (1) : E28-E36

Nilsson, Robert; Theos, Apostolos; Lindberg, Ann-Sofie; et al.

Expression of tissue remodelling, inflammation- and angiogenesis-related factors after eccentric exercise in humans

Molecular Biology Reports, Springer 2021, Vol. 48, (5) : 4047-4054

Philippou, Anastassios; Tryfonos, Andrea; Theos, Apostolos; et al.

How Exercise Benefits Your Health - The Cellular and Molecular Mechanisms

Journal of Orthopedic Research and Therapy, Gavin Publisher 2019, Vol. 4 : 1151-1151

Moustogiannis, Athanasios; Theos, Apostolos

Aerobic Variables for Prediction of Alpine Skiing Performance: A Novel Approach

Sports Medicine International Open, Georg Thieme Verlag KG 2018, Vol. 2, (4) : E105-E112

Nilsson, Robert; Lindberg, Ann-Sofie; Theos, Apostolos; et al.

Quantification of Cell Generated Forces: A Tool to Assess Functionality

Journal of Orthopedic Research and Therapy, (8)

Giannopoulos, Antonios; Yeung, Ching-Yan Chloé; Theos, Apostolos

Effects of Training Surface on Physiological Characteristics of Prepubescent Female Volleyball Players

International Journal of Pediatric Health Care & Advancements, Delaware, USA: SciDoc Publishers 2017, Vol. 4, (5) : 48-53

Theos, Apostolos; Gortsila, Eugenia; Maridaki, Maria

Cancer cachexia and the effects of physical activity

Gavin Journal of Orthopedic Research and Therapy, Lisle: Gavin Publishers 2016, (3)

Krooks, Daniela; Johansson, Malin; Theos, Apostolos

Effect of Training Surface on Agility and Passing Skills of Prepubescent Female Volleyball Players

Journal of Sports Medicine & Doping Studies, Vol. 3

Gortsila, Eugenia; Theos, Apostolos; Nesic, Goran; et al.

Subdivision of molecularly-classified groups by new gene signatures in breast cancer patients

Oncology Reports, Vol. 28, (6) : 2255-2263

Armakolas, Athanasios; Stathopoulos, George P.; Nezos, Adrianos; et al.

Cytokines in muscle damage

Advances in Clinical Chemistry, Vol. 58 : 49-87

Philippou, Anastassios; Maridaki, Maria; Theos, Apostolos; et al.

Effects of two different half-squat training programs on fatigue during repeated cycling sprints in soccer players

Journal of Strength and Conditioning Research, Wolters Kluwer 2011, Vol. 5, (7) : 1849-1856

Bogdanis, Gregory C.; Papaspyrou, Aggeliki; Souglis, Athanasios; et al.

IGF1Ec Expression in MG-63 Human Osteoblast-like Osteosarcoma Cells

Anticancer Research, Vol. 31, (12) : 4259-4265

Philippou, Anastassios; Armakolas, Athanasios; Panteleakou, Zacharoula; et al.

Effects of a hypertrophy and a maximal training program on speed, force and power of soccer players

Science and Football, VI: The Proceedings of the Sixth World Congress on Science and Football, Routledge 2008 : 290-295

Bogdanis, Gregory C.; Papaspyrou, Aggeliki; Souglis, Athanasios; et al.

Influence of resistive load on power output and fatigue during intermittent sprint cycling exercise in children

European Journal of Applied Physiology, Springer 2007, Vol. 101, (3) : 313-320

Bogdanis, Gregory C.; Papaspyrou, Aggeliki; Theos, Apostolos; et al.

Factors associated with muscle strength in 10–16-year-old trained male children

Jansson, Daniel; Domellöf, Magnus; Andersson, Helena; et al.

Individual Profiling for Prediction of Competitive Performance in Alpine Skiing

Nilsson, Robert; Theos, Apostolos; Lindberg, Ann-Sofie; et al.

Lack of Predictive Power in Commonly Used Tests for Performance in Alpine Skiing

Nilsson, Robert; Theos, Apostolos; Lindberg, Ann-Sofie; et al.

View publications in DiVA

Research projects

1 March 2024 until 1 March 2029

Hip and groin problems in elite ice hockey players

I teach exercise physiology at both undergraduate and advanced levels, with a particular focus on children and exercise, testing methodology, and muscle physiology. I am the course coordinator for the course "Field integrated Exercise Physiology for the Exercise Physiologist Programme" and supervise students at both bachelor's and master's levels.

I also serve as the internationalization contact person for the Exercise Physiology Programme, responsible for promoting international collaborations and student exchanges.