MW efficacy in DSP

Abstract In this study, we aimed to investigate the effects of single bout of volleyball on body composition in elite professional female players. Sixteen elite professional female players that play volleyball in a club in Turkish Premier League were enrolled in the study. Prior to one league match (pre-exercise) bioelectric impedance analyzes were performed using a bioelectric impedance analyzer. After the final period (3 rd set) of match was ended, bioelectric impedance analyzes were repeated (post-exercise). There were no significantly changes in body mass index, body cell mass, body capacitance, lean body mass, and basal metabolic rate at post-exercise time. Body resistance, reactance and fat mass were all significantly lower than pre-exercise time (p<0.01). On the other hand, extracellular mass increased at post-exercise time, and that significances were found to be p<0.05. As an intense aerobic exercise, single bout of volleyball (three sets) decreases body fat mass at post-exercise time. This change is associated with decreases in body resistance and reactance. Excess lost of body fat may be related to frequently using anaerobic process for energy requirement in volleyball players and prolonged exercise for competition

Effect of mobile phone usage duration during pregnancy on the general motor movements of infants

AbstractRadiofrequency radiation (RFR) emitted from wireless devices increases rapidly and the most sensitive groups are pregnant women and children. Therefore, we aimed to evaluate the fidgety movements (FMs) and motor repertoires of the infants of pregnant women with different durations of mobile phone usage (DOMFU) in the prenatal period by performing a general movement assessment (GMA) using the Prechtl method. Infants suitable for the study were divided into 4 groups according to their mothers’ duration of mobile phone usage during pregnancy, comprising those who did not talk on a mobile phone (Control Group, n: 31), those with mobile phone usage (MFU) of ∼20 min a day (Group 1, n: 33), those with MFU of ∼40 min a day (Group 2, n: 31), and those with MFU of ∼2 h a day (Group 3, n: 28). The analysis showed that the abnormal fidgety (AF) and absent fidgety (F–), suboptimal motor optimality score (MOS) and reduced motor repertoire were statistically higher in Group 3 compared to the other groups. Normal posture and the quality of other movements were statistically higher in the Control, and Groups 1 and 2 compared to Group 3. According to the findings, infants of mothers with different DOMFU during pregnancy differed with regard to the quality of FMs, MOS, repertoire, posture and other movements. In conclusion, the findings suggested that there may be a relationship between prenatal RFR exposure and motor development in infants. More long-term studies are needed to determine whether these changes are temporary or permanent

Effects of Low-Intensity Microwave Radiation on Oxidant-Antioxidant Parameters and DNA Damage in the Liver of Rats

ALKIS, Mehmet Esref/0000-0002-3321-2873; Dasdag, Suleyman/0000-0003-1211-9677; Akdag, Mehmet Zulkuf/0000-0003-2826-2734WOS:000601618000001PubMed: 33368426The continuously increasing usage of cell phones has raised concerns about the adverse effects of microwave radiation (MWR) emitted by cell phones on health. Several in vitro and in vivo studies have claimed that MWR may cause various kinds of damage in tissues. The aim of this study is to examine the possible effects of exposure to low-intensity MWR on DNA and oxidative damage in the livers of rats. Eighteen Sprague-Dawley male rats were divided into three equal groups randomly (n = 6). Group 1 (Sham-control): rats were kept under conditions the same as those of other groups, except for MWR exposure. Group 2: rats exposed to 1800 MHz (SAR: 0.62 W/kg) at 0.127 +/- 0.04 mW/cm(2) power density, and Group 3: rats exposed to 2,100 MHz (SAR: 0.2 W/kg) at 0.038 +/- 0.03 mW/cm(2) power density. Microwave application groups were exposed to MWR 2 h/day for 7 months. At the end of the exposure period, the rats were sacrificed and DNA damage, malondialdehyde (MDA), 8-hydroxydeoxyguanosine (8-OHdG), and total oxidant-antioxidant parameter analyses were conducted in their liver tissue samples. It was found that 1800 and 2100 MHz low-intensity MWR caused a significant increase in MDA, 8-OHdG, total oxidant status, oxidative stress index, and comet assay tail intensity (P < 0.05), while total antioxidant status levels (P < 0.05) decreased. The results of our study showed that whole-body exposure to 1800 and 2100 MHz low-intensity MWR emitted by cell phones can induce oxidative stress by altering oxidant-antioxidant parameters and lead to DNA strand breaks and oxidative DNA damage in the liver of rats. Bioelectromagnetics. (c) 2020 Bioelectromagnetics Societ

Interstitial space between cells in the left and right lobes of rat brains exposed to 900, 1800 and 2100 MHz radiofrequency radiation

AbstractThe head is the body part that is most exposed to radiofrequency radiation (RFR) during a mobile phone conversation. Therefore, it can be expected that brain cells will be positively or negatively affected by this physical agent. The purpose of this study was to investigate the effects of 900, 1800 and 2100 MHz on the interstitial space between cells in the right and left lobes of the brain. The study was carried out on 28 Wistar Albino rats, which were divided randomly into four groups (n: 7): sham control, 900 MHz, 1800 MHz and 2100 MHz exposure groups. The rats in the exposure groups were subjected to RFR for 3 h/day for one month. At the end of the last exposure, brains were immediately removed and prepared for electron microscopic examination. We determined the interstitial space (µm) between brain cells in the left and right lobes separately and compared them statistically. The results indicated that all three frequencies used in this study increased the interstitial space between cells in both brain lobes. The maximum effective frequencies were 1800 MHz for the right lobe and 2100 MHz for the left lobe. In conclusion, we observed that the RFR used in this study enhanced the interstitial space between cells in both lobes of the brain. Further studies are needed to confirm the results of this study, which we think will open different horizons

Does all-day and long-term exposure to radiofrequency radiation emitted from Wi-Fi affect hearing?

We investigated the long-term effects of radiofrequency radiation (RFR) emitted from Wi-Fi systems on hearing. Sixteen Wistar albino rats were divided equally into two groups: sham control and exposure groups. The rats in the experimental group were exposed to 2.4 GHz RFR emitted from a Wi-Fi generator for 24 h/day for one year. The same procedure was applied to the rats in the sham group, except that the Wi-Fi generator was turned off. All groups were kept in Faraday cages during the 12 months to eliminate external electromagnetic fields. The distance between the Wi-Fi generator antenna and the exposure cages was 50 cm. Pre-exposure distortion product otoacoustic emissions (DPOAE) of all rats were measured at the beginning, 6th and 12th months of the study. The DPOAE values of the sham, baseline and exposure groups were compared statistically. For the 6000 Hz hearing frequency, the DPOAE values in the exposure group were lower than those in the sham group (p < 0.05). Similarly, the 6000 Hz hearing frequency values obtained at the end of the 12th month were also lower than the baseline and 6-month values in the exposure group (p < 0.05). In contrast, the DPOAE values at the 6th and 12th months of exposure for the 2000 Hz hearing frequency were higher than the baseline value (p < 0.05). These results indicated that 12 months of RFR (24 h/day) at 50 cm from a 2.4 GHz Wi-Fi source can affect hearing. However, further studies are necessary

Adverse effects of 900, 1800 and 2100 MHz radiofrequency radiation emitted from mobile phones on bone and skeletal muscle

The goal of this study was to biomechanically and morphologically research both the impact of mobile phone like radiofrequency radiations (RFR) on the tibia and the effects on skeletal muscle through oxidative stress parameters. Fifty-six rats (200-250 g) were put into groups: healthy sham (n = 7), healthy RFR (900, 1800, 2100 MHz) (n = 21), diabetic sham (n = 7) and diabetic RFR (900, 1800, 2100 MHz) (n = 21). Over a month, each group spent two hours/day in a Plexiglas carousel. The rats in the experimental group were exposed to RFR, but the sham groups were not. At the end of the experiment, the right tibia bones and skeletal muscle tissue were removed. The three-point bending test and radiological evaluations were performed on the bones, and CAT, GSH, MDA, and IMA in muscles were measured. There were differences in biomechanics properties and radiological evaluations between the groups (p < .05). In the measurements in the muscle tissues, significant differences were statistically found (p < .05). The average whole-body SAR values for GSM 900, 1800 and 2100 MHz were 0.026, 0.164, and 0.173 W/kg. RFRs emitted from mobile phone may cause adverse effects on tibia and skeletal muscle health, though further studies are needed.Van Yuzuncu Yil University Scientific Research Foundation [BAP, Turkey]; Van Yuzuncu Yil University Scientific Research Foundation [BAP, Turkey, Van Yuzuncu Yil University Scientific Research Foundation [BAP, Turkey]; [TYD-2021-9598]This work was supported by the the Van Yuzuncu Yil University Scientific Research Foundation [BAP, Turkey] under Grant [number TYD-2021-9598]; Van Yuzuncu Yil University Scientific Research Foundation [BAP, Turkey, Van Yuzuncu Yil University Scientific Research Foundation [BAP, Turkey]; Van Yuzuncu Yil University Scientific Research Foundation [BAP, Turkey] Grant [number TYD-2021-9598]

3.5 GHz radiofrequency radiation may affect biomechanics of bone and muscle of diabetics

AbstractWith the developments in wireless technologies, living beings are increasingly exposed to electromagnetic fields (EMFs). EMFs are known to affect bone metabolism and muscle tissue. However, their effects on bones and skeletal muscles are controversial, as some studies have reported positive effects while others have reported adverse effects. In this study, the effects of radiofrequency radiation (RFR) on bone biomechanics and skeletal muscle tissues were investigated in diabetic and healthy rats. Rats were exposed to 3.5 GHz RFR for 2 h per day for 30 days. Bone biomechanics measurements were taken to evaluate the effects of RFR on bone quality, flexibility and durability. The whole-body specific absorption rate (SAR) was found to be 37 mW/kg. The results showed that RFR exposure had adverse effects on bone biomechanics, including decreased elasticity coefficient and Young’s modulus, increased maximum displacement and decreased maximum force. However, oxidative stress parameters in diabetics were also altered by 3.5 GHz RFR to a greater extent than in healthy rats. In conclusion, 3.5 GHz RFR may have potential to alter bone quality and structural integrity including muscle oxidative stress parameters in rats. It should be emphasized that the observed changes were more obvious in diabetic rats. In addition, the changes observed in healthy and diabetic rats exposed to RFR showed a statistically significant difference according to the sham groups