Objective: We examined the effects of eight weeks of single-mode resistance, repeated sprint training, and the combination of the two programs on selected measures of physical fitness (muscle power, speed, and body composition), hematological parameters, and plasma volume variations in highly trained soccer players. Sixty male soccer players from the Tunisian national Ligue were randomly allocated to a resistance training group (RTG), a repeated sprint training group (RSTG), a combined resistance and repeated sprint training group (CTG), or an active control group (CG, soccer training only). The training volumes were similar between groups. Before and after training, we examined body composition, squat jump (SJ), countermovement jump (CMJ), sprint 30 m (S30), repeated-sprint sequences (RSSs), hematocrit, hemoglobin, mean hemoglobin concentration (MHC), and plasma volume. Significant group-by-time interactions were recorded for the RSS indices, SJ, and S30 (p < 0.039], 0.1< ηp2 < 0.49]), as well as the hematological parameters (p = 0.0001–0.045, 0.11 < ηp2 < 0.46). In terms of physical fitness, using post hoc tests, the CTG showed significantly greater gains compared to the RSTG, RTG, and the CG on the best time index of the RSSs (p = 0.008; d = 4.1), SJ (p = 0.004; d = 4.18) and 30 m linear sprint time (p = 0.008; d = 3.84). Body fat percentage also decreased significantly in the CTG compared to all other groups (p < 0.005, 0.21 < d< 0.35). Regarding hematological parameters (i.e., hemoglobin and hematocrit), the CTG, RSTG, and RTG showed significant decreases (p < 0.05) in their hemoglobin and hematocrit values compared to the CG (p < 0.05, 0.11 < d< 2.22]). Eight weeks of combined training compared to single-mode training was found to be more effective in improving fitness measures in highly trained soccer players. However, there appeared to be no consensus regarding the effect of single and combined repeated-sprint and resistance training on the hematological system.

This study aimed to evaluate the effects of Blazepod technology when incorporated with various training regimens on the essential elements of physical fitness in volleyball, such as agility, speed, visual response time, and vertical leap. Thirty-six participants (age :17.33±0.48 y, height: 183.78±6.34 cm, weight: 77.14±5.16 kg) were in-volved in this study. In randomized design, three equal groups with two experimental groups and one control group were involved in the study over a period of six weeks: (GE1) used Blazepod technology to workout at a low level; (GE2) used Blazepod technology to workout at a higher intensity; (CG) did not employ Blazepod technology, but it adhered to the same fundamental training curriculum. We conducted agility, speed, reaction time, and vertical jump tests before, midway and after the study to determine optimal training volume, intensity, and frequency. A significant main effect of time (P0.01), and time×group interaction (P>0.001) were found for all tests. Post hoc test showed that the two experimental groups gadget significantly improved in all performance variables (P

Background: There is increasing awareness of the physiological effects of Ramadan intermittent fasting (RIF) in obese subjects. However, there are no data on the effects of RIF on plasma volume changes (ΔPV) in individuals with different body weights. Background and Objectives: This study investigated the effects of RIF on ΔPV in normal-weight (NW) and overweight (OW) adult men, and adult men with obesity (OB) and severe obesity (SO). Materials and Methods: Thirty-two male subjects (32) were divided into four groups (n = 8 per group) according to their body mass index (BMI): normal weight (NW) (BMI < 25 kg/m²; age = 27.4 ± 3.8), overweight (OW) (BMI between 25 and 29.9 kg/m²; age = 26.8 ± 3.7), obese subjects (OB) (BMI between 30 and 34.9 kg/m²; age = 25.6 ± 2.9), and severely obesity (SO) (BMI between 35 and 40 kg/m²; age = 24.0 ± 4.1). Blood samples were collected for 24 h on 4 different occasions, at T0 before the start of the Ramadan month, at T1 15 days after the start of Ramadan, at T2 one day after the end of Ramadan, and at T3 on the 21st day after the end of Ramadan to determine ΔPV. All groups completed their fasting rituals for the 30 days of Ramadan. Results: A significant group × time effect occurred for body mass (p = 0.001; ES = 0.53), BMI (p = 0.001; ES = 0.53), and body fat percentage (p = 0.001; ES = 0.52). Post hoc tests indicated reductions in body mass in OB and SO at T1 (p = 0.03; ES = 0.21 and p = 0.002; ES = 0.12) and T2 (p = 0.03; ES = 0.31 and p = 0.02; ES = 0.23), reductions in BMI in OB and SO at T1 (p = 0.04; ES = 0.35 and p = 0.03; ES = 0.42) and T2 (p = 0.03; ES = 0.52 and p = 0.005; ES = 0.48), and reductions in body fat percentage only in OB AT T1 (p = 0.002; ES = 0.31) and T2 (p = 0.001; ES = 0.17). A significant group × time effect occurred for hematocrit (p = 0.02; ES = 0.34), hemoglobin (p = 0.01; ES = 0.35), and ΔPV (p = 0.02; ES = 0.18). Post hoc tests indicated increases in hematocrit in OB at T2 (p = 0.03; ES = 0.36) and hemoglobin in OB and SO at T1 (p = 0.03; ES = 0.35 and p = 0.002; ES = 0.32) and T2 (p = 0.003; ES = 0.21 and p = 0.002; ES = 0.33). There were also increases in ΔPV in OB at T1 and T2 (p = 0.002; ES = 0.25 and p = 0.003; ES = 0.22) and in SO only at T2 (p = 0.02; ES = 0.37). Contrast analysis indicated that NW was significantly lower than the grand mean of OW, Ob, and SO for all anthropometric and PVV variables (all p < 0.05). Conclusions: The effects of RIF on ΔPV and anthropometric characters was greater in obese individuals compared to normal-weight and overweight participants, suggesting that the improvements in body composition and ΔPV produced by RIF could positively influence obesity.

Objective: The study aimed to investigate the effect of light stimulation technology when integrated with different training systems on certain physical attributes in volleyball. Methodology: The study adopted the experimental approach, with a sample consisting of 36 volleyball players from the Algerian Premier League. They were randomly divided into three equal groups: two experimental groups and one control group, Group 1: Utilized light stimulation technology for low-intensity training Group 2: Utilized light stimulation technology for high-intensity training, Control Group: Did not use light stimulation technology but adhered to the same basic training program of the team, Tests for agility, reaction speed, and jumping ability were conducted before, during, and after the study to determine the optimal volume and intensity of training, Results: Post-study results revealed significant improvements in all physical attributes under study for the experimental groups, while no significant changes were observed in the control group. The improvement rates in the post-test measurements for agility tests (IAT) were as follows: Group 1: 0.72, Group 2: 0.78, Control Group: 0.23. For the T-Drill test: Group 1: 0.72, Group 2: 0.68, Control Group: 0.05. For visual reaction speed tests (Balsom): Group 1: 0.92, Group 2: 0.72, Control Group: 0.12, and the Zig-Zag test: Group 1: 0.88, Group 2: 0.50, Control Group: 0.21. For vertical jump tests (Sargent Jump): Group 1: 0.85, Group 2: 0.77, Control Group: 0.33, and the Run-Up Double-Leg Take-Off Jump: Group 1: 0.59, Group 2: 0.72, Control Group: 0.25. Recommendations: The adoption of light stimulation technology (Blazepod) as an effective training tool for enhancing physical and skill performance is highly recommended. الهدف: هدفت الدراسة إلى معرفة تأثير تقنية المثيرات الضوئية عند دمجها مع أنظمة التدريب المختلفة على بعض الصفات البدنية في الكرة الطائرة، المنهج: اعتمدت الدراسة على المنهج التجريبي، حيث تكونت عينة الدراسة من(36) لاعب كرة طائرة من الدوري الجزائري للدرجة الممتازة، تم تقسيمهم بطريقة عشوائية إلى ثلاث مجموعات متساوية تضم مجموعتين تجريبيتين ومجموعة ضابطة واحدة وفق التالي: (المجموعة 1) استخدمت تقنية المثيرات الضوئية للتمرين على مستوى منخفض الكثافة، (المجموعة 2) استخدمت تقنية المثيرات الضوئية للتمرين على مستوى عالي الكثافة، (المجموعة الضابطة) لم تستخدم تقنية المثيرات الضوئية ولكنها التزمت بنفس برنامج التدريب الأساسي للفريق، و تم إجراء اختبارات الرشاقة وسرعة رد الفعل والوثب قبل الدراسة، وفي منتصفها، وبعدها...