Comparação de resposta da pressão intraocular frente a duas diferentes intensidades e volumes do treinamento resistido / A comparison of the intraocular pressure response between two different intensities and volumes of resistance training

Objetivo: Verificar a influência de duas diferentes intensidades e volumes de treinamento resistido na pressão intraocular. Método: Dezenove boxeadores (13 homens e 6 mulheres; idade média de 22 ± 3 anos) foram randomicamente submetidos a duas diferentes sessões de exercícios resistidos: resistência muscular com 3 séries de 15 repetições máximas e hipertrofia muscular com 4 séries de 8RM. A pressão intraocular foi obtida com Tonometro de Perkins antes, durante e após as sessões de exercício resistido. Os dados foram expressos em média e desvio padrão. Foi realizada análise de variância (ANOVA) com medidas repetidas e pós teste de Tukey. Resultados: Foi observada redução da pressão intraocular durante as sessões de treinamento resistido. Contudo, a sessão de exercício para resistência muscular promoveu uma redução significativa da pressão intraocular comparada a de hipertrofia muscular. Ao final da sessão de resistência muscular a pressão intraocular retornou aos valores prévios ao exercício, por outro lado na sessão de hipertrofia muscular a pressão intraocular após o término dos exercícios apresentou-se acima dos valores iniciais. Conclusão: O treinamento resistido pode influenciar os valores da pressão intraocular, especificamente 3 séries de 15 repetições com 60% de 1RM promoveu respostas hipotensivas mais expressivas na pressão intraocular do que 3 séries de 8 repetições com 80% de 1RM. Esses achados podem contribuir para prescrição de exercício resistido para pessoas com fatores de risco para o glaucoma. .

Abstract Purpose: To verify the influence of two different intensities and volumes of resistance training on intraocular pressur. Method: Nineteen athletes boxers (13 male and 6 female; mean age of 22 ± 3 years) were randomly assigned to two different resistance exercise sessions: muscular endurance with 3 sets of 15 repetition maximum and muscular hypertrophy with 4 sets of 8 RM. The intraocular pressure was measured with a Perkins tonometer before, during and after the resistance exercise sessions. Data were expressed as mean and standard deviation. A repeated-measures analysis of variance (ANOVA) was used and the Tukey post hoc test for multiple comparisons were applied. Results: A reduction in intraocular pressure during the resistance exercise session was observed. However, the muscular endurance exercise produced a significant reduction in intraocular pressure when compared with muscular hypertrophy. At the end of session, intraocular pressure returned to pre-exercise levels in muscular endurance session and above to pre-exercise levels in hypertrophy session. Conclusion: Resistance exercises influence intraocular pressure values, thus 3 sets of 15 repetitions with 60%1RM promote better intraocular pressure responses than 3 sets of 8 repetitions with 80% 1RM. This finding of the present research can contribute in prescription of resistance exercise to people with glaucoma risk factors. .

Study of plasma lipid and lipoprotein profile in elite women boxers during a six weeks' training progamme.

The present study was undertaken with an objective to frame out the lipid profile of Indian Women Boxers. Women boxing is a newly recognized game and no work has been reported on elite female boxers in India till date. The study was based on a sample of 45 women boxers (age 17 ~ 24 years) attending Senior National Women Boxing Camp at Sports Authority of India. Each subject was evaluated for Lipid Profile variables at the beginning and end of the six weeks training camp. Fasting blood samples were taken from the antecubital vein by venipuncture. Before the samples drawn the subjects were asked to take rest for ten minutes. The blood sample was analyzed by HITACHI UV-2000 spectrophotometer (Japan). Standard techniques and procedures were followed for all the estimation. Volume and intensity of different components of training was measured by observational and physiological methods. Data were subjected to statistical treatment like mean and standard deviation. Test of significance't' - test (for paired sample) was applied to asses the difference in pre & post-test. Results reveal that mean (+/-SD) Cholesterol, Triglyceride, LDL, HDL - Cholesterol and Cholesterol / HDL Cholesterol ratio was 144.7 +/- 3.6 mg%, 59.7 +/- 17.5 mg% 81.4 +/- 21.1 mg% 51.3 +/- 8.2 mg% and 2.8 +/- 0.5 respectively as found in the pre-test. Significant difference (P < 0.01) was observed in Cholesterol, LDL-Cholesterol, HDL Cholesterol level in the post-test. The study concludes that women who practice sport of boxing on regular basis have a favorable lipid profile. A significant change in lipid profile of the boxers was observed after 6 weeks' training program.

Energy expenditure in women boxing.

OBJECTIVES: Women boxing have got recognition recently and so far no work has been reported on energy expenditure of national women boxers in India. This study was aimed to estimate the energy expenditure in Indian female boxers during sparring. METHODS: A total of 20 female boxers were subjected. Energy expenditure was estimated using the same individual's HR-VO2 regression equation. Heart rate was recorded through radiotelemetry. RESULTS: Results reveal that average and maximum energy expenditure considering the total duration of boxing are 12.7 +/- 1.3 and 14.4 +/- 1.6 kcal/min. CONCLUSIONS: It is concluded that depending on the severity of energy expenditure female boxing comes under heavy category and as it is a pioneer attempt in India, further studies in this aspect are really required which will guide the coaches regarding the energy expenditure pattern in women boxing.

Heart rate & blood lactate response in amateur competitive boxing.

The heart rate (HR) and blood lactate response were studied on 26 senior national level boxers in competitive bouts to explore the aerobic-anaerobic metabolism as well as the training status of the players. The aerobic capacity (VO2 max) of the players were determined using graded running protocol on a treadmill. Heart rate and blood lactate concentration were measured during warm up and boxing rounds. The mean relative VO2 max of the heavy weight category boxers was lower (P < 0.05) than the other two weight categories. No interweight category as well as inter-round differences were observed in the heart rate and blood lactate concentration of the boxers, excepting in the 48-57 kg category, the mean lactate levels in the second and third rounds were higher (P < 0.05) than in the first round. When all weight categories were pooled the mean HR and blood lactate levels were 178 beats/min and 8.24 mMol/l respectively. The study highlights that in amateur boxing, irrespective of the weight category and aerobic capacity, the anaerobic adaptability of the boxers was the same. The training requirements of the boxers demand that they should be also to tolerate a high blood lactate level (approx. 9.0 mMol/l) and a high HR (approx. 180 beats/min) over a total duration of one bout.