The aim of this study was to investigate the effect of ingesting sodium bicarbonate (SB) and sodium citrate (SC) on 400 m high-intensity swimming performance and blood responses. Six nationally ranked male swimmers (20.7 ± 2.1 yrs; 184 ± 6 cm; 79.9 ± 3.9 kg; 10.6 ± 1% body fat) participated in a double blinded, placebo controlled crossover trial. Ninety minutes after consuming SB (0.3 g·kg-1), SC (0.3 g·kg-1) or a placebo (PL) participants completed a single 400-m freestyle maximal test on three consecutive days. The order of the supplementation was randomized. Capillary blood samples were collected on 4 occasions: at rest (baseline), 60 min post-ingestion, immediately post-trial and 15 min post-trial. Blood pH, HCO3- concentration and base excess (BE) were determined. Blood pH, HCO3-, BE were significantly elevated from before loading to the pre-test (60 min post-ingestion) (p < 0.05) after SB ingestion, but not after SC ingestion (p > 0.05). Performance times were improved by 0.6% (p > 0.05) after supplementation of SB over PL in 5 out of 6 participants (responders). In contrast, ingestion of SC decreased performance by 0.2% (p > 0.05). No side effects were observed in either trial. Delayed blood response was observed after SC ingestion compared to SB and this provided no or modest ergogenic effect, respectively, for single bout high-intensity swimming exercise. Monitoring the magnitude of the time-to-peak level rise in alkalosis may be recommended in order to individualize the loading time accordingly before commencement of exercise.

Limited practical recommendations related to wearing compression garments for athletes can be drawn from the literature at the present time. We aimed to identify the effects of compression garments on physiological and perceptual measures of performance and recovery after uphill running with different pressure and distributions of applied compression. In a random, double blinded study, 10 trained male runners undertook three 8 km treadmill runs at a 6% elevation rate, with the intensity of 75% VO2max while wearing low, medium grade compression garments and high reverse grade compression. In all the trials, compression garments were worn during 4 hours post run. Creatine kinase, measurements of muscle soreness, ankle strength of plantar/dorsal flexors and mean performance time were then measured. The best mean performance time was observed in the medium grade compression garments with the time difference being: medium grade compression garments vs. high reverse grade compression garments. A positive trend in increasing peak torque of plantar flexion (60º·s-1, 120º·s-1) was found in the medium grade compression garments: a difference between 24 and 48 hours post run. The highest pain tolerance shift in the gastrocnemius muscle was the medium grade compression garments, 24 hour post run, with the shift being +11.37% for the lateral head and 6.63% for the medial head. In conclusion, a beneficial trend in the promotion of running performance and decreasing muscle soreness within 24 hour post exercise was apparent in medium grade compression garments.

Objective: The purpose of the study is to compare the effect of ten-week lasting whole-body electromyostimulation (WB-EMS) and the circuit resistance training programme (RT) on body composition and strength parameters in women at risk of sarcopenia. Methods: The WB-EMS programme was carried out once a week and included ten exercise sessions, the RT was carried out twice a week and included 20 sessions. 17 elderly women participated in the study, nine in a WB-EMS intervention group (age: 63.11±1.52 years; weight: 70.07±9.07kg; height: 165.11±6.4cm; BMI 25.81±3.96kg/m2), eight in a RT group (age: 62.13±1.69 years; weight: 73.58±3.87 kg; BMI 27.34±2.58 kg/m2). To assess body composition, dual-energy X-ray absorptiometry (DXA) was used. To determine the level of strength parameters, hand dynamometry and isokinetic dynamometry of knee flexors and knee extensors were used. Results: Body composition assessment was performed by dual-energy X-ray absorptiometry and strength parameters were evaluated using isometric dynamometry (knee flexors and extensors strength). After completing ten weeks of intervention, significant differences were observed for lean muscle mass (RT group, Leanmasspre-test 43316.91 ± 1856.77 vs. Leanmasspost-test 43939.56 ± 1869.84, p= 0.0307). No significant differences were found between the pre-test and post-test in the WB-EMS group (Leanmasspre-test 39472.56 ± 3370.04 vs. Leanmasspost-test 38835.56 ± 3306.84, p= 0.5995). The isokinetic dynamometry analysis showed significant differences for the extensors and the peak torque on the right side in the RT group (Extensors Peak Torquepre-test 98.00 ± 13.55 vs. Extensors Peak Torquepost-test 38835.56 ± 3306.84, p= 0.0160; Flexors Peak Torquepre-test 54.25 ± 11.14 vs. Flexors Peak Torquepost-test 59.75 ± 11.13, p= 0.0059). Conclusions: The most obvious finding that emerges from this study is that resistance training has shown a greater effect than whole-body electromyostimulation.

Objective: This study aimed to investigate the effect of whole-body electromyostimulation (WB-EMS) and resistance training (RT) on the level of functional fitness in a group of elderly women. Participants: 63 women (60-65 years) were randomly divided into 2 experimental groups (19 in WB-EMS, 22 in RT) and one control group (22 women). Both experimental groups underwent a ten-week lasting interventional program, the control group was asked to maintain their usual daily regimen and lifestyle. Methods: Senior fitness test battery (SFT) determined the level of functional fitness in participants, and the dual-energy X-ray absorptiometry (DXA) assessed the body composition.  Results: The RT group reported a statistically significant difference between pre-and post-test in values of the Chair Stand test (p = 0.04), 8 Foot up and Go (p = 0.03), in the Back Scratch test left side (p = 0.02) and the Chair Sit and Reach test right side (p = 0.05). The WB-EMS interventional program had a positive statistically significant effect only the on level of flexibility of the lower limbs measured by the Chair Sit and Reach test left side (p = 0.05). Conclusions:  The results of all individual components of functional fitness measured by SFT in both experimental groups (WB-EMS, RT) show an improving tendency. Comparing WB-EMS and RT groups, better results were confirmed in the RT group. Study limitations: Extending the length of intervention programs could have a more significant effect on the level of functional fitness in elderly women. Keywords: ageing, functional fitness, Senior fitness test, DXA, resistance training, WB-EMS

In recent years, there has been an increasing interest in physical activity programs for older adults. Questions have been raised about the efficacy of programs regarding real effects on life. The purpose of the study is to compare the impact of ten weeks of Whole-Body Electromyostimulation (WB-EMS) and resistance training (RT) programs on one mineral density (BMD) and T-score values in women at risk of osteoporosis. The WB-EMS was carried out once per week (total: ten sessions), the RT was carried out twice per week (total: 20 sessions). Twenty-eight elderly women participated in the study, nine in a WB-EMS group (weight: 69.84±10.29kg; BMI: 25.04±4.18 kg/m2), eight in a RT group (weight: 74.16±4.19kg; BMI: 27.35±2.76 kg/m2), and ten in a control group (CG) (weight: 79.72±15.61kg kg; BMI 28.58±5.70 kg/m2). A dual-energy X-ray absorptiometry scanner (DXA) was used to assess body composition, BMD, and T-score values.  To identify the statistical significance of the differences between pre-test and post-test in all groups, the parametric t-test was used. Statistical significance was set at p ≤ 0.05. Although no significant differences were found in either BMD or T-score values, the study appeared to elicit some positive behaviour that could have an impact for more than ten weeks. The present study was designed to determine the effect of RT and WB-EMS on selected parameters in groups of women at risk of osteoporosis. Even though the results were not statistically significant, we consider the impact of programs on the level of BMD and T-score beneficial. Results show that the RT method is more practical. More tested subjects of the RT reported the same or higher level of BMD in the post-test compared to the WB-EMS method (RT 50% vs WB-EMS 44.7%). It was impossible to further investigate the significant relationships between selected parameters and intervention because the sample size was too small. Therefore, a further study with more focus on the duration of intervention and an increase in sample size is suggested.