ELECTROCARDIOGRAPHIC CHARACTERISTICS OF ATHLETES OF MOUNT CAMEROON ASCENT: PREVENTION OF SUDDEN DEATH

Mountain ultra-marathons participants are exposed to multiple internal and external stressors, from exercise and environment that can affect the cardiovascular response such as electrocardiographic profile (ECG). The aim of this study was to determine the electrocardiographic profile of athletes participating on the mount Cameroon race. Fifty-nine athletes and 50 non-athletes (31±7 vs 24±3 years) participated to the study during the 17th edition of Mount Cameroon ascent on February 18, 2012. ECG of 12-leads rest was measured in athletes and non-athletes. Resting heart rate (54±3 vs 71±9 bats/min) was lower (P<0.001) in athletes than non-athletes. P wave duration (108.5±1.8 vs 100.7±1.7 ms), PR interval (170.4±27.2 vs 155.8±22.3 ms), and RR interval (1072.3±188.2 vs 875.6±128.4 ms) were significantly higher (P<0.001) in athletes compared to non-athletes. However, on Rhythm and morphology abnormalities, athletes developed a sinus bradycardia (88.1 vs 8%), sinus arythmia (76.3 vs 22%) and left ventricular hypertrophy (54.2 vs 6%) higher than those of non-athletes (P<0.001). For the abnormalities of ECG conduction, atrioventricular block I (11.9 vs 6%), incomplete Right Bundle Branch Block (5.1 vs 2 %), incomplete Left Branch Block (1.7 vs 0%), Left anterior fascicular block (1.7 vs 0%), T-wave inversion (V1-V6) (10.2 vs 8%), Short PR (3.4 vs 2%), Sus ST Segment shift (5.1 vs 4%) were similar in both groups. But, early repolarization (40.7 vs 16%) was significantly higher (P<0.001) in athletes than non-athletes. Mountain race athletes develop some cardiac ECG electric morpho-functional abnormalities.  Article visualizations

Effect of Schoolbag Weight on Musculoskeletal Pain among Primary School Children in Yaounde, Cameroon: A Cross-sectional Study

Background: Heavy schoolbag is known to cause health problems for school children. The aim of this study was to determine the effects of carrying heavy schoolbags on the musculoskeletal pain among primary school children of the two subsystems in Yaounde, Cameroon. Methods: A cross-sectional study was carried out in primary schools in Yaounde. A total of 457 school-children (8.2 ± 2.2 years) were included, 202 from the French-speaking subsystem, and 255 from the English-speaking subsystem. Parameters studied included weight, height, and schoolbag weight. A questionnaire was used to collect socio-demographic information and potential musculoskeletal pain in three regions: back, shoulders, and neck. Results: The mean weight of children and their bags was 28.4 ± 8.2 kg and 5.2 ± 2.3 kg respectively. More than 50% of schoolchildren in the two subsystems carried a schoolbag weighing more than 15% of body weight. The back (38%) was the least affected area in comparison to the shoulders (58.6%) and neck (42.4%) (p < 0.001). Carrying heavy bags and walking to school was associated with pain in the back, shoulders, and neck. School-children in the French-speaking subsystem had lower risk (adjusted Odds Ratio 0.438, 95% Confidence Interval [CI] = 0.295-0.651; p < 0.001) to develop a sore neck compared to peers from the English-speaking subsystem. Conclusion: Carrying heavy schoolbags is associated to musculoskeletal pain in schoolchildren. The means moving to and from school is a main risk factor of developing musculoskeletal pain. French-speaking schoolchildren develop less neck pain than English-speaking schoolchildren

Schoolbag Weight and Low Back Pain: A Cross-Sectional Study among Children of Public and Private Primary Schools in Cameroon

Background: The issue of excessively heavy schoolbags remains a public health concern in Africa. This study aimed to determine the weight of schoolbags among students in the public and private sectors of Yaoundé city, Cameroon and identify factors associated with low back pain.Methods: A cross-sectional study was conducted during the first term of the 2020/2021 academic year in French-speaking private and public primary schools in Yaoundé city, Cameroon. The study involved 2000 pupils (8.41±2.11 years), with 1000 from the public sector and 1000 from the private sector. The variables analyzed included weight, height, and schoolbag weight. A questionnaire, developed specifically for this study and based on the Standardized Nordic Body Map Questionnaire, was used to collect socio-demographic information and assess potential musculoskeletal low back pain. A diagram was included to indicate the lower back area for reporting pain. The questionnaire was administered, and each student answered it, with assistance from the investigator if needed. Descriptive and inferential statistics, as well as multiple logistic regressions, were employed for data analysis.Results: The average weight of the children and their schoolbags was 28.51±8.04 kg and 4.04±1.72 kg, respectively. Nearly 45% of the pupils were carrying a schoolbag weighing more than 15% of their body weight, and 23% reported experiencing low back pain. Schoolbag weights ranging from 10-15% of body weight were associated with a threefold higher risk (OR=2.66; 95% CI=1.65 – 4.31; P<0.0001) of developing low back pain. Pupils in the public sector had a lower risk (OR=0.28; P<0.0001) of developing low back pain.Conclusion: Children in the private sector experience low back pain more frequently. Carrying heavy schoolbags is associated with low back pain among pupils

Musculoskeletal disorders among secondary school teachers in Douala, Cameroon: The effect of the practice of physical activities

IntroductionMusculoskeletal disorders (MSDs) represent an important threat to public health in both developed and developing countries, and are present in many occupational sectors including education. Regular practice of physical activity (PA) is known elicit preventive effects on the occurrence of MSDs.ObjectiveThis study aimed at determining the prevalence of MSDs and the preventive impact of PA on their occurrence among secondary school teachers.Participants and MethodsA cross-sectional study was conducted among 179 teachers in five government secondary schools in Douala, Cameroon. The Nordic and Ricci-Gagnon questionnaires were used to determine MSDs and to assess the level of PA, respectively.ResultsThe 12-month and 7-day prevalence of MSD (PMSD-12m and PMSD-7d) were 84.3% and 69.3%, respectively. The most affected body regions by MSDs were neck (PMSD-12m = 54.2%, PMSD-7d = 33.5%), lower back (PMSD-12m = 43%, PMSD-7d = 33%), and shoulders (PMSD-12m = 35%, PMSD-7d = 22.9%). Compared to female, males were protected against MSDs during the last 12 months (OR = 0.37; 95% CI 0.16–0.93; p = 0.04). The risk of MSDs during the last seven days was higher in teachers aged 30-40 years (OR = 2.86; 95% CI 1.14–7.14; p = 0.02) and 40-50 years (OR = 4.28; 95% CI 1.49–16.29; p = 0.008) than those under 30 years. This risk was tripled in inactive teachers (OR = 3.07; 95% CI 1.40–6.78; p = 0.005), compared to their active counterparts.ConclusionMSDs are prevalent among secondary school teachers and associated with aging, gender, and lower level of P

Anthropometry, Physiological Characteristics and Motor Performances of Young Male Soccer Players in Cameroon According to Their Age Category and Playing Position

International audienceIntroduction: This study aimed at examining the anthropometry, physiological parameters and performances of young footballers recruited and formed in Cameroon without data base and physical fitness assessments. Methods: 128 young soccer players from two training structures subdivided into 3 categories (46 U13, 41 U15 and 41 U17) and 6 playing positions participated in this study. Their height, body mass, body mass index (BMI), blood pressure and resting heart rate were determined prior to the linear sprints test (10m and 20m), vertical jump, and Léger’s shuttle run test over 20m. Data analysis and comparisons between categories and playing positions have been carried out using Statview 0.5. Differences were considered significant for p < 0.05. Results: The mean values of anthropometric parameters and blood pressure significantly increased with age category whereas resting heart rate decreased. Central defenders and goalkeepers were respectively tallest and heaviest. In general, performances increased significantly from U13 to U15 and tend to stagnate between U15 and U17 with no significant difference between playing positions. Conclusion: This study provided preliminary references in the identification and follow up of young cameroonian talents belonging to their age categories and playing positions. Developing aerobic endurance is the main emergency particularly for U17 players

Physical Fitness and Its Associated Factors Among Children and Teenagers in Urban and Semi-Urban Settings in Two Localities of the Littoral Province, Cameroon

Background: Physical fitness in Cameroonian students has been assessed previously, but most have focused on urban areas. This study aimed to objectively evaluate two components of physical fitness and factors associated with it among urban and semiurban secondary school students in two municipalities in the Littoral province, Cameroon.Methods: A cross-sectional study was conducted between January and April 2021 in three randomly selected secondary schools in the Littoral Province. The study included 459 students aged 10 to 15 years, comprising 252 students from urban areas (UA) and 207 from semi-urban areas (SUA). Each student’s height, weight, and blood pressure were assessed, and two field tests (20-m shuttle test and 4x10-m test) were performed to estimate maximal oxygen uptake (VO2max) and measure agility. Descriptive and inferential statistics were used for data analysis.Results: The overall prevalence of overweight/obesity was 21.4%, with a higher prevalence of overweight/obesity among boys in semi-urban areas and an equal prevalence of overweight among urban and semi-urban girls. SUA students performed significantly better in the speed test (4x10-m) and VO2max (P<0.001 and P=0.01, respectively) compared to UA students. A comparison of age groups [ (10-12 yrs) and (13-15 yrs)] showed no significant difference in VO2max values between urban and semi-urban dwellers (P=0.06 and P=0.29, respectively). VO2max values were above the threshold values associated with the risk of developing cardiovascular diseases.Conclusions: Urban students were less physically active than semi-urban students, but the prevalence of overweight/obesity was similar in both settings

Epidemiology of Musculoskeletal Disorders among the Teaching Staff of the University of Douala, Cameroon: Association with Physical Activity Practice

International audienceThe aim of this study was to assess the epidemiology of musculoskeletal disorders (MSDs) among the teaching staff of the University of Douala and determine their association with physical activity (PA) practice. The Nordic questionnaire was used to assess MSDs. Ricci-Gagnon questionnaire was used to determine the level of PA. We recruited 104 participants mean-aged 42 +/- 8 years, 80% male. Previous 7 days and 12 months prevalence were 56.7% and 80.8%, respectively. The most affected body regions were neck, shoulders and lower back. No significant association was found between MSDs and PA. Celibacy was significantly associated with previous 7-days MSDs (p = 0.048) while age >= 45 years and job seniority >= 10 years were significantly associated with a reduced risk of previous 12-months MSDs (p = 0.039 and p = 0.016, respectively). The prevalence of MSDs among university of Douala teaching staff showed no significant effect with the practice of PA

Poor quality of sleep and musculoskeletal pains among highly trained and elite athletes in Senegal

Abstract Background Previous studies reported that poor sleep quality (PSQ) was associated with musculoskeletal pains (MSP) and poor physical performance in athletes. Objective The current study aimed at determining PSQ and its associations with MSP in some sub-Saharan athletes. Methods A cross sectional study was conducted among 205 highly trained and 115 elite athletes (aged: 25 ± 2 years, Body mass index: 22.8 ± 0.9 kg/m2) in Dakar, Senegal, during a competitive season in a variety of sport disciplines including athletics, basketball, football, rugby, wrestling, tennis. Quality of sleep and MSP were assessed using the French version Pittsburgh Sleep Quality Index (PSQI) and French version of Nordic questionnaire respectively. Pain on body joints during a week was defined as seven-day MSP (MSP-7d) and PSQ for a PSQI > 5. Results 27.8% (95%CI: 23.2–32.9) of the overall sample suffered PSQ, with 33.7% (95%CI: 24.7–44.0) in basketball and 24.7% (95%CI: 16.9–34.6) in football. According to athletic status and gender, PSQ was more prevalent among highly trained (66.3; 95%CI: 55.9–75.3) and men (69.7%; 95%CI: 59.5–78.7). Among athletes with PSQ 43.8% (95%CI: 33.9–54.2) suffered MSP-7d, with 36.6%; highly trained (95%CI: 23.7–42.9) and 28.1% female. Considering body region, hips/thigh (14.6%; 95% CI: 8.74–23.4) and upper back (13.5%; 95%CI: 7.88 -21, 1) were more affected. Basketball players were more affected from MSP (MSP-7d = 38.5%; 95%CI: 24. 9–54.1) on high on wrists/hands (MSP-7d = 44.4%; 95%CI: 18.9 -73.3; P = 0.04). Based on athletic status, MSP-7d were higher on highly trained necks (100%; 95%CI: 56.1–100; p = 0.04). PSQ was associated with basketball (OR: 3.062, 95%CI: 1.130–8.300, p = 0.02) compared to Athletic. PSQ and MSP-7d were associated on Wrist/hands (OR: 3.352, 95%CI: 1.235–9.099, p = 0.01), and at the upper back (OR: 5.820, 95%CI: 2.096–16.161, p = 0.0007). Conclusion These results indicate that PSQ is considerable among Senegalese athletes and is associated with MSP during a week. Hence, we recommend to look for strategies optimizing good quality of sleep in order to reduce pains, to improve health

Prevalence of metabolic syndrome and components in rural, semi-urban and urban areas in the littoral region in Cameroon: impact of physical activity

Abstract Background Living areas in developing countries impact seriously lifestyle by modifying energy consumption and energy expenditure. Thus, urbanization is associated with less practice of physical activity (PA), a leading cause of metabolic syndrome (MetS) which prevalence vary in African countries. The present study aimed to assess the effect of PA on MetS according to urbanization level in the littoral region, Cameroon. Methods A cross-sectional study was conducted in three geographical settings (urban, semi-urban, and rural) in the littoral region in Cameroon. A total of 879 participants were included (urban: 372, semi-urban: 195 and rural: 312). MetS was defined according to the International Federation of Diabetes 2009. The level of PA was assessed using the Global Physical Activity questionnaire. Results Low level of PA was (P < 0.0001) reported in urban (54.5%), semi-urban (28.7%) and rural (16.9%) and high level in rural area (77.9%). The prevalence of MetS was higher in urban areas (37.2%), then rural (36.8%) and finally semi-urban (25.9%). Hyperglycemia (p = 0.0110), low HDL-c (p < 0.0001) and high triglyceridemia (p = 0.0068) were most prevalent in urban residents. Participants with low level of PA were at risk of MetS (OR: 1.751, 95% CI 1.335–2.731, p = 0.001), hyperglycemia (OR: 1.909, 95% CI 1.335–2.731, p = 0.0004) abdominal obesity(OR: 2.007, 95% CI 1.389–2.900, p = 0.0002), low HDL-c (OR: 1.539, 95% CI 1.088–2.179, p = 0.014) and those with moderate level of PA were protected against high blood pressure(OR: 0.452, 95% CI 0.298–0.686, p = 0.0002) and compared to those with high level of PA. Urban dwellers were at the risk of MetS compared to rural residents (OR: 1.708, 95% CI. 1.277–2.285, p = 0.003) and protected against high blood pressure (OR:0.314, 95% CI 0.212–0.466, p < 0.0001), abdominal obesity (OR: 0.570, 95% CI 0.409–0.794, p = 0.0009), and low HDL-c (OR: 0.725, 95% CI 0.534–0.983, p = 0.038) compared to rural residents. Conclusions MetS was more prevalent in urban dwellers and was associated with a low level of PA