प्रायोगिक जीवविज्ञान के यूरोपीय जर्नल खुला एक्सेस

अमूर्त

Effect of growth level on changing pattern of cardio–respiratory fitness index (Vo2 peak) in 8 to 14 year old non-athletic girls

Attari. Elham, Nobakht Ramezani. Zahra and Sadeghi. Nahid

Cardiovascular respiratory endurance linearly increases since childhood and reaches its jumping point in puberty. Maximal oxygen consumption is an index of efficiency measurement for oxygen transmission system. Children and adolescents with equal chronological age have different growth levels. This biological parameter affects behavior of sex hormones, climatic conditions, genetic mutations and body composition (allometric equations related to body size). Hence, it is very important to consider growth level of puberty while drawing physico-motor fitness norms or processes of sports talent programs. Seven hundred 8 to 14 year old girl students in seven age groups were classified to three growth levels of normal, early or late. Anthropometric parameters and maximal oxygen cost were measured. In terms of anthropometric factors of height, weight and body mass index at various ages and different growth levels, no statistically significant difference was found (p>0.05). A significant difference was observed between three growth levels according to Vo2 peak body weight at age of 9 (p <0.05) and no significant difference was found at other ages. Maximal oxygen consumption tended to increase and decrease proportional to growth level in 8 to 14 year old girls in terms of absolute and relative values, respectively.