Dimitrios Mexis

Mr. Dimitrios Mexis

National and Kapodistrian University of Athens, Department of Physical Education and Sports Science, Athens, Attikí, Greece

Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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26 May 2022 in Sports
Verified
Journal Article
Open access
PDF file
DMDimitrios Mexis
Dimitrios Mexis
Tzortzis NomikosTzortzis Nomikos
Tzortzis Nomikos
NKNikolaos Kostopoulos
Nikolaos Kostopoulos
The pre-season period in basketball includes all the physiological attributes that the players need to work on and develop, in order to sustain a full season workload. The monitoring of the effectiveness of pre-season training is based on a variety of biochemical and physiological indices; however, it is still unclear how pre-season training affects those markers. Therefore, this study aimed to analyze the effects of pre-season training on biochemical and physiological markers. A search was performed in five large scientific databases (Pubmed (Medline), Scopus, Science-Direct, Sport-Discus (EBSCO), Semantic Scholar) and produced 7081 results, which after removing duplicates and applying inclusion and exclusion criteria, resulted in 28 published scientific articles being included in this review. The most important findings suggested that the majority of the studies used a 6- or an 8-week pre-season training protocol, because these protocols have shown significant positive effects over the years. In addition, the plyometric training protocols that were used by many studies have been found to be beneficial for basketball athletes for many physiological parameters. Furthermore, the evaluation of biochemical markers can be a very useful tool in monitoring and managing fatigue, which is an essential part of modifying the training process, in order to maximize performance.

16 November 2023 in Sports
Verified
Journal Article
Open access
PDF file
DMDimitrios Mexis
Dimitrios Mexis
Tzortzis NomikosTzortzis Nomikos
Tzortzis Nomikos
NMNikolaos Mitsopoulos
Nikolaos Mitsopoulos
NKNikolaos Kostopoulos
Nikolaos Kostopoulos
This study aimed to investigate the effects of a 6-week preseason functional and plyometric fitness training protocol, on physiological and biochemical markers of performance and exercise-induced muscle damage, and to compare the response of these markers between high-level female and male basketball players. The sample of the study consisted of 19 professional athletes (10 male; 9 female) competing in two different teams. The examined markers were body mass, BMI, fat percentage, speed, acceleration, explosiveness, vertical jumping ability, creatine kinase (CK) and lactate dehydrogenase (LDH). The preseason training period improved speed, acceleration, explosiveness and vertical jumping ability (~1–8%) and led to significant fat percentage reductions in both groups equivalently. CK and LDH increased similarly in both groups, and the percentage increases were higher for CK compared to LDH. Further investigation and a larger sample size are required in order to determine an approach that is more capable of maximizing performance without causing any possible injuries that may be related to muscle damage.

11 February 2025 in Applied Sciences
Verified
Journal Article
Open access
PDF file
DMDimitrios Mexis
Dimitrios Mexis
Tzortzis NomikosTzortzis Nomikos
Tzortzis Nomikos
NKNikolaos Kostopoulos
Nikolaos Kostopoulos
This study examined the impact of three pre-season fitness training protocols with different training frequencies (heavy, moderate and light) on the physical abilities and the biochemical indicators of muscle damage and oxidative stress in female basketball athletes as expressed through physiological and biochemical assessments. Also, a comparison and a search for correlations were made between the physiological and biochemical changes that were caused by each protocol. The sample consisted of 28 professional female basketball athletes, who competed in three different teams, and each training protocol was assigned to each of the three teams. The somatometric and performance markers measured were as follows: weight, fat percentage, aerobic capacity, anaerobic capacity, vertical jumping ability, speed, acceleration, explosiveness and maximum lower body part strength. The biochemical measurements consisted of exercise-induced muscle damage (creatine kinase—CK, lactate dehydrogenase—LDH) and oxidative stress markers (protein carbonyls—PCs, glutathione peroxidase—GPx). The three fitness training protocols that were used improved the fitness status of high-level female basketball athletes after 6 weeks during the pre-season period, but they were also accompanied by some significant differences between them (fat percentage, anaerobic capacity, speed and acceleration). The results were also accompanied by an increase in CK and LDH for the three teams and by an increase in GPx for Teams 1 and 3. Also, we concluded that even 4 more or 4 less fitness training units (TUs) during a 6-week basketball preparation period can be considered important to differentiate the outcomes of physiological and biochemical markers. The purpose of this study was to provide more theoretical and practical knowledge to basketball coaches and trainers, so they can optimize the training process during the preparation period and thus maximize the performance of their athletes. Nevertheless, the present study was created with certain limitations, such as the small sample size for each team, the absence of a long-term follow-up or the lack of a control group. Future studies may need to turn their focus on fitness protocols with longer durations, try to differentiate the types of training protocols and attempt to achieve a better balance between maximizing performance and mitigating the muscle damage and oxidative stress levels.